infinite spin in RT when booting with DHCP on

infinite spin in RT when booting with DHCP on

[Hector Palacios]

Hello,

I'm working on a 2.6.31.14 kernel on ARM where I applied the RT PREEMPT patch 
2.6.31.12-rt21.

When booting my platform with DHCP on, the DHCP request is sent by the network driver 
before the PHY has even started the autonegotiation.
Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY but the 
softirq [sirq-net-tx] seems to have entered an infinite spin, as my system is 
practically hung and 'top' reveals [sirq-net-tx/0] is consuming 95% of CPU. This is 
preventing the PHY autonegotiation (which is scheduled as a delayed work) to start, so 
the PHY is never ready and the packet never reaches the network.

I was wondering if this situation resembles what the patch by Ingo Molnar "tasklet/rt: 
Prevent tasklets from going into infinite spin in RT" describes.

This patch is already in 2.6.31.12-rt21 patch which I'm using so either it is a 
different problem or a corner case of the same issue.

Could anyone tell whether it is the same or a different problem?
Thank you
-- 
Héctor Palacios

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Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

Hi
> When booting my platform with DHCP on, the DHCP request is sent by the
> network driver before the PHY has even started the autonegotiation.
> Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY
> but the softirq [sirq-net-tx] seems to have entered an infinite spin, as
> my system is practically hung and 'top' reveals [sirq-net-tx/0] is
> consuming 95% of CPU. This is preventing the PHY autonegotiation (which is
> scheduled as a delayed work) to start, so the PHY is never ready and the
> packet never reaches the network.
Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is
enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
static ip is configured and the probably during network transfer the network
interface is reconfigured. Basically it seems the sirq-net-tx thread tries to
send a packet on a non configured interface.

But one thing that makes me thinking, is that this thing is only happening on
arm and not on x86. So Hector what platform are you working on. Are you by
chance using the same fec.c ethernet driver?

I have verified that in my case the driver takes always the return statement in
line fec.c:247: return NETXDEV_TX_BUSY;  
It never stops on a breakpoint set on line 250 which shows that the interface
gets never configured.

I have taken some screenshots of my hw debugger:

trace:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit.png
stack:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stacktrace.png
locals:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stack+locals.png

Whats interesting to note is that phy_dev and mii_dev are both null pointers.

Best regards
Tim

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147  
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147 
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhorst | Aufsichtsratsvorsitzender: James Charles Webster

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Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

Hello,

On 02/02/2012 01:38 PM, Tim Sander wrote:
 > Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is
 > enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
 > static ip is configured and the probably during network transfer the network
 > interface is reconfigured. Basically it seems the sirq-net-tx thread tries to
 > send a packet on a non configured interface.
 >
 > But one thing that makes me thinking, is that this thing is only happening on
 > arm and not on x86. So Hector what platform are you working on. Are you by
 > chance using the same fec.c ethernet driver?

I'm working on an i.MX51 and using the fec.c driver as well. Interesting that it is 
not happening on x86.

 > I have verified that in my case the driver takes always the return statement in
 > line fec.c:247: return NETXDEV_TX_BUSY;
 > It never stops on a breakpoint set on line 250 which shows that the interface
 > gets never configured.

Autonegotiation is triggered by phy_state_machine() at phy.c which is scheduled as a 
delayed work by phy_device.c upon PHY device creation.
This is not even started when the fec_enet_start_xmit() function is called.

 > I have taken some screenshots of my hw debugger:
 >
 > 
trace:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit.png
 > 
stack:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stacktrace.png
 > 
locals:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stack+locals.png
 >
 > Whats interesting to note is that phy_dev and mii_dev are both null pointers.

I'll check this but it is probably because the PHY device is not yet created or 
initialized.

Best regards,
-- 
Héctor Palacios
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Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

Hi
> On 02/02/2012 01:38 PM, Tim Sander wrote:
>  > Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp
>  > is enabled the ksoftirq is also running wild with 3.0-rt. This also
>  > happens when static ip is configured and the probably during network
>  > transfer the network interface is reconfigured. Basically it seems the
>  > sirq-net-tx thread tries to send a packet on a non configured
>  > interface.
>  > 
>  > But one thing that makes me thinking, is that this thing is only
>  > happening on arm and not on x86. So Hector what platform are you
>  > working on. Are you by chance using the same fec.c ethernet driver?
> 
> I'm working on an i.MX51 and using the fec.c driver as well. Interesting
> that it is not happening on x86.
Well, at least no one else spoke out on this problem before

>  > I have verified that in my case the driver takes always the return
>  > statement in line fec.c:247: return NETXDEV_TX_BUSY;
>  > It never stops on a breakpoint set on line 250 which shows that the
>  > interface gets never configured.
> 
> Autonegotiation is triggered by phy_state_machine() at phy.c which is
> scheduled as a delayed work by phy_device.c upon PHY device creation.
> This is not even started when the fec_enet_start_xmit() function is called.
> 
>  > I have taken some screenshots of my hw debugger:
> trace:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_
> start_xmit.png
> 
> stack:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_
> start_xmit_stacktrace.png
> 
> locals:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet
> _start_xmit_stack+locals.png
> 
>  > Whats interesting to note is that phy_dev and mii_dev are both null
>  > pointers.
> 
> I'll check this but it is probably because the PHY device is not yet
> created or initialized.
Well the phy seems to be initialized in fec_enet_open->fec_enet_mii_probe.
But opened is set to 0 so this codepath has not been run, so not initialized.
If the device is not opended how does it tries to send packets?

Best regards
Tim

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147  
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147 
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Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

Hi

Attached you will find a hacky patch which should just verify that the problem 
hypothesis can be validated.
It just initializes the phy with driver initialisation and should work around 
this ksoftirq/sirq-net-tx problem.

Best regards
Tim


From 5dda8d2f7d068ca2534441215d9437f3bbb0c652 Mon Sep 17 00:00:00 2001

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

Registered as GmbH (German limited liability corporation) in the commercial register at the local court of Darmstadt, HRB 1147  
Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of the board: James Charles Webster

Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregister des Amtsgerichts Darmstadt unter HRB 1147 
Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhorst | Aufsichtsratsvorsitzender: James Charles Webster

The information in this email is confidential. It is intended solely for the addressee. If you are not the intended recipient, please let me know and delete this email.

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From: Tim Sander <tim.sander@hbm.com>
Date: Thu, 2 Feb 2012 15:51:06 +0100
Subject: [PATCH] fec: hack around ksoftirqd problem

---
 drivers/net/fec.c |   58 ++++++++++++++++++++++++++++------------------------
 1 files changed, 31 insertions(+), 27 deletions(-)

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 885d8ba..292ae7e 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -231,6 +231,7 @@ static void *swap_buffer(void *bufaddr, int len)
        return bufaddr;
 }
 
+
 static netdev_tx_t
 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 {
@@ -1135,24 +1136,6 @@ static int
 fec_enet_open(struct net_device *ndev)
 {
        struct fec_enet_private *fep = netdev_priv(ndev);
-       int ret;
-
-       /* I should reset the ring buffers here, but I don't yet know
-        * a simple way to do that.
-        */
-
-       ret = fec_enet_alloc_buffers(ndev);
-       if (ret)
-               return ret;
-
-       /* Probe and connect to PHY when open the interface */
-       ret = fec_enet_mii_probe(ndev);
-       if (ret) {
-               fec_enet_free_buffers(ndev);
-               return ret;
-       }
-       phy_start(fep->phy_dev);
-       netif_start_queue(ndev);
        fep->opened = 1;
        return 0;
 }
@@ -1164,15 +1147,6 @@ fec_enet_close(struct net_device *ndev)
 
        /* Don't know what to do yet. */
        fep->opened = 0;
-       netif_stop_queue(ndev);
-       fec_stop(ndev);
-
-       if (fep->phy_dev) {
-               phy_stop(fep->phy_dev);
-               phy_disconnect(fep->phy_dev);
-       }
-
-       fec_enet_free_buffers(ndev);
 
        return 0;
 }
@@ -1432,10 +1406,32 @@ fec_probe(struct platform_device *pdev)
        netif_carrier_off(ndev);
 
        ret = register_netdev(ndev);
+
        if (ret)
                goto failed_register;
 
+// Tim: very hacky for testing
+       /* I should reset the ring buffers here, but I don't yet know
+        * a simple way to do that.
+        */
+
+       ret = fec_enet_alloc_buffers(ndev);
+       if (ret)
+               return ret;
+
+       /* Probe and connect to PHY when open the interface */
+       ret = fec_enet_mii_probe(ndev);
+       if (ret) {
+               fec_enet_free_buffers(ndev);
+               return ret;
+       }
+       phy_start(fep->phy_dev);
+       netif_start_queue(ndev);
+       fep->opened = 1;
+// end hacky 
+
        return 0;
+
 
 failed_register:
        fec_enet_mii_remove(fep);
@@ -1466,7 +1462,15 @@ fec_drv_remove(struct platform_device *pdev)
        struct fec_enet_private *fep = netdev_priv(ndev);
        struct resource *r;
 
+       netif_stop_queue(ndev);
        fec_stop(ndev);
+
+       if (fep->phy_dev) {
+               phy_stop(fep->phy_dev);
+               phy_disconnect(fep->phy_dev);
+       }
+
+       fec_enet_free_buffers(ndev);
        fec_enet_mii_remove(fep);
        clk_disable(fep->clk);
        clk_put(fep->clk);
-- 
1.7.0.4

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Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

Hi Tim,

On 02/02/2012 04:32 PM, Tim Sander wrote:
> Attached you will find a hacky patch which should just verify that the problem
> hypothesis can be validated.
> It just initializes the phy with driver initialisation and should work around
> this ksoftirq/sirq-net-tx problem.

Confirmed, this hack works around the problem.


> ---
>   drivers/net/fec.c |   58 ++++++++++++++++++++++++++++------------------------
>   1 files changed, 31 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/net/fec.c b/drivers/net/fec.c
> index 885d8ba..292ae7e 100644
> --- a/drivers/net/fec.c
> +++ b/drivers/net/fec.c
> @@ -231,6 +231,7 @@ static void *swap_buffer(void *bufaddr, int len)
>          return bufaddr;
>   }
>
> +
>   static netdev_tx_t
>   fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>   {
> @@ -1135,24 +1136,6 @@ static int
>   fec_enet_open(struct net_device *ndev)
>   {
>          struct fec_enet_private *fep = netdev_priv(ndev);
> -       int ret;
> -
> -       /* I should reset the ring buffers here, but I don't yet know
> -        * a simple way to do that.
> -        */
> -
> -       ret = fec_enet_alloc_buffers(ndev);
> -       if (ret)
> -               return ret;
> -
> -       /* Probe and connect to PHY when open the interface */
> -       ret = fec_enet_mii_probe(ndev);
> -       if (ret) {
> -               fec_enet_free_buffers(ndev);
> -               return ret;
> -       }
> -       phy_start(fep->phy_dev);
> -       netif_start_queue(ndev);
>          fep->opened = 1;
>          return 0;
>   }
> @@ -1164,15 +1147,6 @@ fec_enet_close(struct net_device *ndev)
>
>          /* Don't know what to do yet. */
>          fep->opened = 0;
> -       netif_stop_queue(ndev);
> -       fec_stop(ndev);
> -
> -       if (fep->phy_dev) {
> -               phy_stop(fep->phy_dev);
> -               phy_disconnect(fep->phy_dev);
> -       }
> -
> -       fec_enet_free_buffers(ndev);
>
>          return 0;
>   }
> @@ -1432,10 +1406,32 @@ fec_probe(struct platform_device *pdev)
>          netif_carrier_off(ndev);
>
>          ret = register_netdev(ndev);
> +
>          if (ret)
>                  goto failed_register;
>
> +// Tim: very hacky for testing
> +       /* I should reset the ring buffers here, but I don't yet know
> +        * a simple way to do that.
> +        */
> +
> +       ret = fec_enet_alloc_buffers(ndev);
> +       if (ret)
> +               return ret;
> +
> +       /* Probe and connect to PHY when open the interface */
> +       ret = fec_enet_mii_probe(ndev);
> +       if (ret) {
> +               fec_enet_free_buffers(ndev);
> +               return ret;
> +       }
> +       phy_start(fep->phy_dev);
> +       netif_start_queue(ndev);
> +       fep->opened = 1;
> +// end hacky
> +
>          return 0;
> +
>
>   failed_register:
>          fec_enet_mii_remove(fep);
> @@ -1466,7 +1462,15 @@ fec_drv_remove(struct platform_device *pdev)
>          struct fec_enet_private *fep = netdev_priv(ndev);
>          struct resource *r;
>
> +       netif_stop_queue(ndev);
>          fec_stop(ndev);
> +
> +       if (fep->phy_dev) {
> +               phy_stop(fep->phy_dev);
> +               phy_disconnect(fep->phy_dev);
> +       }
> +
> +       fec_enet_free_buffers(ndev);
>          fec_enet_mii_remove(fep);
>          clk_disable(fep->clk);
>          clk_put(fep->clk);

Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Thu, 2012-02-02 at 13:38 +0100, Tim Sander wrote:

> I have verified that in my case the driver takes always the return statement in
> line fec.c:247: return NETXDEV_TX_BUSY;  

Thank you!  I think I found the problem. That return of NETXDEV_TX_BUSY
was key.

> It never stops on a breakpoint set on line 250 which shows that the interface
> gets never configured.
> 
> I have taken some screenshots of my hw debugger:
> 
> trace:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit.png
> stack:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stacktrace.png
> locals:http://private.vlsi.informatik.tu-darmstadt.de/tstone/linux/fec_enet_start_xmit_stack+locals.png
> 

As I suspected, this looks to be another case of the ksoftirqd starving
the rest of the processes.

We have the following code:

net/core/dev.c: __dev_xmit_skb()

I'm assuming we're hitting this path:

	} else if ((q->flags & TCQ_F_CAN_BYPASS) && !qdisc_qlen(q) &&
		   qdisc_run_begin(q)) {
		/*
		 * This is a work-conserving queue; there are no old skbs
		 * waiting to be sent out; and the qdisc is not running -
		 * xmit the skb directly.
		 */
		if (!(dev->priv_flags & IFF_XMIT_DST_RELEASE))
			skb_dst_force(skb);

		qdisc_bstats_update(q, skb);

		if (sch_direct_xmit(skb, q, dev, txq, root_lock)) {
			if (unlikely(contended)) {
				spin_unlock(&q->busylock);
				contended = false;
			}
			__qdisc_run(q);
		} else
			qdisc_run_end(q);

		rc = NET_XMIT_SUCCESS;


net/sched/sch_generic.c: sch_direct_xmit()

	if (!netif_tx_queue_frozen_or_stopped(txq))
		ret = dev_hard_start_xmit(skb, dev, txq);


net/core/dev.c: dev_hard_start_xmit()

		rc = ops->ndo_start_xmit(nskb, dev);
		trace_net_dev_xmit(nskb, rc, dev, skb_len);
		if (unlikely(rc != NETDEV_TX_OK)) {
			if (rc & ~NETDEV_TX_MASK)
				goto out_kfree_gso_skb;
			nskb->next = skb->next;
			skb->next = nskb;
			return rc;
		}


ops->ndo_start_xmit == fec_enet_start_xmit

drivers/net/fec.c: fec_enet_start_xmit()

	if (!fep->link) {
		/* Link is down or autonegotiation is in progress. */
		return NETDEV_TX_BUSY;
	}

NETDEV_TX_BUSY is part of NET_TX_MASK thus the packet is requeued (the
skb->next = nskb) in dev_hard_start_xmit(). And the NETDEV_TX_BUSY is
passed back to sch_derect_xmit() which calls dev_requeue_skb() which
then calls __netif_schedule(q) which will call __netif_reschedule(q)
which will then do raise_softirq_irqoff(NET_TX_SOFTIRQ).

Thus, as soon as ksoftirq exits this routine, it will restart the
process over again. As the fec driver never finished with its
negotiations, the process starts over again and we never move forward.

I'm not sure what the best way to handle this is.

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Thu, 2012-02-02 at 15:25 +0100, Tim Sander wrote:
> > 
> > I'm working on an i.MX51 and using the fec.c driver as well. Interesting
> > that it is not happening on x86.
> Well, at least no one else spoke out on this problem before
> 

I'm thinking that fec.c is not available for x86, as it seems that the
dependencies don't allow it to be enabled.

That said, as I think I know the problem, can you try this patch to see
if it fixes things. This patch is a TOTAL HACK! Not for inclusion. It's
racy and buggy. I didn't even compile it because I couldn't get the
configs to enable FEC, and I was too lazy to set up my cross compiler to
test it. ;-)

-- Steve

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 885d8ba..9368dc2 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -231,6 +231,9 @@ static void *swap_buffer(void *bufaddr, int len)
 	return bufaddr;
 }
 
+static DECLARE_COMPLETION(kick_ksoftirq);
+static int comp_set;
+
 static netdev_tx_t
 fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 {
@@ -243,6 +246,9 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	unsigned long flags;
 
 	if (!fep->link) {
+		if (comp_set)
+			wait_for_completion(&kick_ksoftirq);
+
 		/* Link is down or autonegotiation is in progress. */
 		return NETDEV_TX_BUSY;
 	}
@@ -794,6 +800,8 @@ static void fec_enet_adjust_link(struct net_device *ndev)
 	/* Link on or off change */
 	if (phy_dev->link != fep->link) {
 		fep->link = phy_dev->link;
+		complete(&kick_ksoftirq);
+		comp_set = 0;
 		if (phy_dev->link)
 			fec_restart(ndev, phy_dev->duplex);
 		else
@@ -914,6 +922,9 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 	fep->link = 0;
 	fep->full_duplex = 0;
 
+	init_completion(&kick_ksoftirq);
+	comp_set = 1;
+
 	printk(KERN_INFO "%s: Freescale FEC PHY driver [%s] "
 		"(mii_bus:phy_addr=%s, irq=%d)\n", ndev->name,
 		fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev),

Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Thu, 2012-02-02 at 12:33 -0500, Steven Rostedt wrote:

> NETDEV_TX_BUSY is part of NET_TX_MASK thus the packet is requeued (the
> skb->next = nskb) in dev_hard_start_xmit(). And the NETDEV_TX_BUSY is
> passed back to sch_derect_xmit() which calls dev_requeue_skb() which
> then calls __netif_schedule(q) which will call __netif_reschedule(q)
> which will then do raise_softirq_irqoff(NET_TX_SOFTIRQ).
> 
> Thus, as soon as ksoftirq exits this routine, it will restart the
> process over again. As the fec driver never finished with its
> negotiations, the process starts over again and we never move forward.
> 

I'm thinking this bug exists in mainline too. If you set the ksoftirqd
threads to a real-time task on mainline, and then enable this driver,
you may also get it to starve.

Right now, the softirq will detect the requeueing, and push it off to
the ksoftirqd thread. But in mainline, that runs as a normal process,
and it will let the worker thread finish the negotiations. But if that
was a RT task, it might not.

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Uwe Kleine-König]

Hello Tim,

On Thu, Feb 02, 2012 at 01:38:44PM +0100, Tim Sander wrote:
> Hi
> > When booting my platform with DHCP on, the DHCP request is sent by the
> > network driver before the PHY has even started the autonegotiation.
> > Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY
> > but the softirq [sirq-net-tx] seems to have entered an infinite spin, as
> > my system is practically hung and 'top' reveals [sirq-net-tx/0] is
> > consuming 95% of CPU. This is preventing the PHY autonegotiation (which is
> > scheduled as a delayed work) to start, so the PHY is never ready and the
> > packet never reaches the network.
> Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is
> enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can you
provide me your config. Does the problem occur on every boot for you? If
not, how often do I need to reboot?

@Hector: Greeting to Spain. I don't have an imx51 machine handy, but
your config and your answers on my questions might help, too.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Thu, 2012-02-02 at 21:13 +0100, Uwe Kleine-König wrote:

> enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
> I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can you
> provide me your config. Does the problem occur on every boot for you? If
> not, how often do I need to reboot?

Note, you also said (on IRC) that you boot off this card via NFS root.
I'm not sure Tim has the same setup, and that may be a big difference in
how this bug comes about.

It's a race issue, and it may require enabling the network interface
after the system is up and running.

-- Steve


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Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

Hi Guys

Am Donnerstag 02 Februar 2012, 22:34:26 schrieb Steven Rostedt:
> On Thu, 2012-02-02 at 21:13 +0100, Uwe Kleine-König wrote:
> > enabled the ksoftirq is also running wild with 3.0-rt. This also happens
> > when I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can
> > you provide me your config. Does the problem occur on every boot for
> > you? If not, how often do I need to reboot?
> 
> Note, you also said (on IRC) that you boot off this card via NFS root.
> I'm not sure Tim has the same setup, and that may be a big difference in
> how this bug comes about.
> 
> It's a race issue, and it may require enabling the network interface
> after the system is up and running.
Its indeed a race and it is most of the time only triggered when ubifs is 
attached or the ubifs worker thread is active in background. The error must be 
there sleeping for at least 2.6.31. We where using 2.6.33-rt (if i remember 
correctly) and it might occoured once but i wasn't sure back then. Which lead 
me to the complete wrong direction that ubi was at fault. The bug occurs only 
very seldom with static ip addresses configured. So dhcp is needed to 
reproduce this bug more easily. Then i found out that connman is a good way to 
trigger this bug. So to trigger i started dhclient, connman and if it didn't 
show up i did some "ifconfig eth0 up/down" poking. But the first time i had 
the hw debugger wired it didn't show up for some reason even when i was trying 
to trigger it for an hour or so.

@Uwe: I am currently at home and its to late to fire my work computer up. 
You'll get the kconfig tomorrow... ahm later.
I will then also test the patch of Steve if i manage that before leaving to 
FOSDEM :-).

Best regards
Tim
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Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

[-- Attachment #1: Type: text/Plain, Size: 1103 bytes --]

Hi

Attached is my kernel config for the freescale i.mx35 pcm043 which shows this 
ksoftirq bug under 3.0-rt.

Best regards
Tim

Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany | www.hbm.com 

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[-- Attachment #2: kernelconfig --]
[-- Type: text/plain, Size: 49610 bytes --]

#
# Automatically generated make config: don't edit
# Linux/arm 3.0.17pmx Kernel Configuration
#
CONFIG_ARM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_HAVE_SCHED_CLOCK=y
CONFIG_GENERIC_GPIO=y
# CONFIG_ARCH_USES_GETTIMEOFFSET is not set
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_KTIME_SCALAR=y
CONFIG_HAVE_PROC_CPU=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_ARM_PATCH_PHYS_VIRT=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_LZO=y
# CONFIG_KERNEL_GZIP is not set
# CONFIG_KERNEL_LZMA is not set
CONFIG_KERNEL_LZO=y
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_FHANDLE is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_IRQ_FORCED_THREADING=y
# CONFIG_SPARSE_IRQ is not set

#
# RCU Subsystem
#
CONFIG_TREE_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
CONFIG_RCU_FANOUT=32
# CONFIG_RCU_FANOUT_EXACT is not set
# CONFIG_TREE_RCU_TRACE is not set
CONFIG_RCU_BOOST=y
CONFIG_RCU_BOOST_PRIO=1
CONFIG_RCU_BOOST_DELAY=50
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
# CONFIG_NAMESPACES is not set
# CONFIG_SCHED_AUTOGROUP is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_EXPERT=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# CONFIG_PERF_COUNTERS is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_COMPAT_BRK=y
CONFIG_SLAB=y
# CONFIG_PROFILING is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_DMA_API_DEBUG=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_BLOCK=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_DEADLINE is not set
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_CFQ is not set
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
# CONFIG_MUTEX_SPIN_ON_OWNER is not set
# CONFIG_FREEZER is not set

#
# System Type
#
CONFIG_MMU=y
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_REALVIEW is not set
# CONFIG_ARCH_VERSATILE is not set
# CONFIG_ARCH_VEXPRESS is not set
# CONFIG_ARCH_AT91 is not set
# CONFIG_ARCH_BCMRING is not set
# CONFIG_ARCH_CLPS711X is not set
# CONFIG_ARCH_CNS3XXX is not set
# CONFIG_ARCH_GEMINI is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
CONFIG_ARCH_MXC=y
# CONFIG_ARCH_MXS is not set
# CONFIG_ARCH_NETX is not set
# CONFIG_ARCH_H720X is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP23XX is not set
# CONFIG_ARCH_IXP2000 is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_DOVE is not set
# CONFIG_ARCH_KIRKWOOD is not set
# CONFIG_ARCH_LOKI is not set
# CONFIG_ARCH_LPC32XX is not set
# CONFIG_ARCH_MV78XX0 is not set
# CONFIG_ARCH_ORION5X is not set
# CONFIG_ARCH_MMP is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_W90X900 is not set
# CONFIG_ARCH_NUC93X is not set
# CONFIG_ARCH_TEGRA is not set
# CONFIG_ARCH_PNX4008 is not set
# CONFIG_ARCH_PXA is not set
# CONFIG_ARCH_MSM is not set
# CONFIG_ARCH_SHMOBILE is not set
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C2410 is not set
# CONFIG_ARCH_S3C64XX is not set
# CONFIG_ARCH_S5P64X0 is not set
# CONFIG_ARCH_S5PC100 is not set
# CONFIG_ARCH_S5PV210 is not set
# CONFIG_ARCH_EXYNOS4 is not set
# CONFIG_ARCH_SHARK is not set
# CONFIG_ARCH_TCC_926 is not set
# CONFIG_ARCH_U300 is not set
# CONFIG_ARCH_U8500 is not set
# CONFIG_ARCH_NOMADIK is not set
# CONFIG_ARCH_DAVINCI is not set
# CONFIG_ARCH_OMAP is not set
# CONFIG_PLAT_SPEAR is not set
# CONFIG_ARCH_VT8500 is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_KEYBOARD_GPIO_POLLED is not set
CONFIG_IMX_HAVE_PLATFORM_FEC=y
CONFIG_IMX_HAVE_PLATFORM_FLEXCAN=y
CONFIG_IMX_HAVE_PLATFORM_FSL_USB2_UDC=y
CONFIG_IMX_HAVE_PLATFORM_IMX2_WDT=y
CONFIG_IMX_HAVE_PLATFORM_IMX_I2C=y
CONFIG_IMX_HAVE_PLATFORM_IMX_SSI=y
CONFIG_IMX_HAVE_PLATFORM_IMX_UART=y
CONFIG_IMX_HAVE_PLATFORM_IPU_CORE=y
CONFIG_IMX_HAVE_PLATFORM_MXC_EHCI=y
CONFIG_IMX_HAVE_PLATFORM_MXC_NAND=y
CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX=y
CONFIG_IMX_HAVE_PLATFORM_SPI_IMX=y

#
# Freescale MXC Implementations
#
# CONFIG_ARCH_MX1 is not set
# CONFIG_ARCH_MX2 is not set
# CONFIG_ARCH_MX25 is not set
CONFIG_ARCH_MX3=y
# CONFIG_ARCH_MX503 is not set
# CONFIG_ARCH_MX51 is not set
CONFIG_ARCH_MX35=y
CONFIG_SOC_IMX35=y

#
# MX31 platforms:
#
# CONFIG_MACH_MX31ADS is not set
# CONFIG_MACH_MX31LILLY is not set
# CONFIG_MACH_MX31LITE is not set
# CONFIG_MACH_PCM037 is not set
# CONFIG_MACH_MX31_3DS is not set
# CONFIG_MACH_MX31MOBOARD is not set
# CONFIG_MACH_QONG is not set
# CONFIG_MACH_ARMADILLO5X0 is not set
# CONFIG_MACH_KZM_ARM11_01 is not set
# CONFIG_MACH_BUG is not set

#
# MX35 platforms:
#
CONFIG_MACH_PCM043=y
# CONFIG_MACH_MX35_3DS is not set
# CONFIG_MACH_EUKREA_CPUIMX35 is not set
# CONFIG_MACH_VPR200 is not set
CONFIG_MXC_IRQ_PRIOR=y
CONFIG_MXC_AVIC=y
# CONFIG_MXC_PWM is not set
# CONFIG_MXC_DEBUG_BOARD is not set
CONFIG_HAVE_EPIT=y
# CONFIG_MXC_USE_EPIT is not set
CONFIG_MXC_ULPI=y
CONFIG_ARCH_MXC_IOMUX_V3=y
CONFIG_ARCH_MXC_AUDMUX_V2=y

#
# System MMU
#

#
# Processor Type
#
CONFIG_CPU_V6=y
CONFIG_CPU_32v6=y
CONFIG_CPU_ABRT_EV6=y
CONFIG_CPU_PABRT_V6=y
CONFIG_CPU_CACHE_V6=y
CONFIG_CPU_CACHE_VIPT=y
CONFIG_CPU_COPY_V6=y
CONFIG_CPU_TLB_V6=y
CONFIG_CPU_HAS_ASID=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y
CONFIG_CPU_USE_DOMAINS=y

#
# Processor Features
#
CONFIG_ARM_THUMB=y
# CONFIG_CPU_ICACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_CPU_BPREDICT_DISABLE is not set
CONFIG_OUTER_CACHE=y
CONFIG_OUTER_CACHE_SYNC=y
CONFIG_CACHE_L2X0=y
CONFIG_ARM_L1_CACHE_SHIFT=5
CONFIG_ARM_DMA_MEM_BUFFERABLE=y
CONFIG_CPU_HAS_PMU=y
CONFIG_ARM_ERRATA_411920=y
# CONFIG_PL310_ERRATA_588369 is not set
# CONFIG_PL310_ERRATA_727915 is not set

#
# Bus support
#
# CONFIG_PCI_SYSCALL is not set
# CONFIG_ARCH_SUPPORTS_MSI is not set
# CONFIG_PCCARD is not set
# CONFIG_PL310_ERRATA_769419 is not set

#
# Kernel Features
#
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_PREEMPT=y
CONFIG_PREEMPT_RT_BASE=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT_LL is not set
# CONFIG_PREEMPT_RTB is not set
CONFIG_PREEMPT_RT_FULL=y
CONFIG_HZ=300
CONFIG_AEABI=y
# CONFIG_OABI_COMPAT is not set
# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
CONFIG_HAVE_ARCH_PFN_VALID=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CLEANCACHE is not set
CONFIG_FORCE_MAX_ZONEORDER=11
CONFIG_ALIGNMENT_TRAP=y
# CONFIG_UACCESS_WITH_MEMCPY is not set
# CONFIG_SECCOMP is not set
# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_DEPRECATED_PARAM_STRUCT is not set

#
# Boot options
#
# CONFIG_USE_OF is not set
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE="console=ttymxc0,115200 init=/usr/sbin/init lpj=2654208 quiet ip=none ubi.mtd=3 root=ubi0:root rootfstype=ubifs mtdparts=physmap-flash.0:256k(barebox)ro,128k(env),2M(kernel),-(rootfs);mxc_nand:-(data)"
CONFIG_CMDLINE_FROM_BOOTLOADER=y
# CONFIG_CMDLINE_EXTEND is not set
# CONFIG_CMDLINE_FORCE is not set
# CONFIG_XIP_KERNEL is not set
CONFIG_KEXEC=y
CONFIG_ATAGS_PROC=y
# CONFIG_CRASH_DUMP is not set
CONFIG_AUTO_ZRELADDR=y

#
# CPU Power Management
#
# CONFIG_CPU_IDLE is not set

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
CONFIG_VFP=y

#
# Userspace binary formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set

#
# Power management options
#
# CONFIG_SUSPEND is not set
# CONFIG_PM_RUNTIME is not set
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=m
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_IP_PNP_BOOTP is not set
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=m
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=m
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_SIT=m
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
# CONFIG_NETFILTER_ADVANCED is not set

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
# CONFIG_NF_CONNTRACK_FTP is not set
# CONFIG_NF_CONNTRACK_IRC is not set
# CONFIG_NF_CONNTRACK_SIP is not set
# CONFIG_NF_CT_NETLINK is not set
CONFIG_NETFILTER_XTABLES=y

#
# Xtables combined modules
#
CONFIG_NETFILTER_XT_MARK=m

#
# Xtables targets
#
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m

#
# Xtables matches
#
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
# CONFIG_IP_SET is not set
CONFIG_IP_VS=m
# CONFIG_IP_VS_IPV6 is not set
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
# CONFIG_IP_VS_PROTO_TCP is not set
# CONFIG_IP_VS_PROTO_UDP is not set
# CONFIG_IP_VS_PROTO_AH_ESP is not set
# CONFIG_IP_VS_PROTO_ESP is not set
# CONFIG_IP_VS_PROTO_AH is not set
# CONFIG_IP_VS_PROTO_SCTP is not set

#
# IPVS scheduler
#
# CONFIG_IP_VS_RR is not set
# CONFIG_IP_VS_WRR is not set
# CONFIG_IP_VS_LC is not set
# CONFIG_IP_VS_WLC is not set
# CONFIG_IP_VS_LBLC is not set
# CONFIG_IP_VS_LBLCR is not set
# CONFIG_IP_VS_DH is not set
# CONFIG_IP_VS_SH is not set
# CONFIG_IP_VS_SED is not set
# CONFIG_IP_VS_NQ is not set

#
# IPVS application helper
#
# CONFIG_IP_VS_NFCT is not set

#
# IP: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV4=m
CONFIG_NF_CONNTRACK_IPV4=m
# CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_LOG=m
# CONFIG_IP_NF_TARGET_ULOG is not set
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
# CONFIG_IP_NF_TARGET_MASQUERADE is not set
# CONFIG_NF_NAT_FTP is not set
# CONFIG_NF_NAT_IRC is not set
# CONFIG_NF_NAT_TFTP is not set
# CONFIG_NF_NAT_AMANDA is not set
# CONFIG_NF_NAT_PPTP is not set
# CONFIG_NF_NAT_H323 is not set
# CONFIG_NF_NAT_SIP is not set
CONFIG_IP_NF_MANGLE=m

#
# IPv6: Netfilter Configuration
#
CONFIG_NF_DEFRAG_IPV6=m
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_IP6_NF_IPTABLES=m
# CONFIG_IP6_NF_MATCH_IPV6HEADER is not set
# CONFIG_IP6_NF_TARGET_LOG is not set
CONFIG_IP6_NF_FILTER=m
# CONFIG_IP6_NF_TARGET_REJECT is not set
# CONFIG_IP6_NF_MANGLE is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
# CONFIG_BATMAN_ADV is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
CONFIG_CAN=y
CONFIG_CAN_RAW=y
CONFIG_CAN_BCM=y

#
# CAN Device Drivers
#
# CONFIG_CAN_VCAN is not set
# CONFIG_CAN_SLCAN is not set
CONFIG_CAN_DEV=y
CONFIG_CAN_CALC_BITTIMING=y
# CONFIG_CAN_MCP251X is not set
CONFIG_HAVE_CAN_FLEXCAN=y
CONFIG_CAN_FLEXCAN=y
# CONFIG_CAN_SJA1000 is not set
# CONFIG_CAN_C_CAN is not set

#
# CAN USB interfaces
#
# CONFIG_CAN_EMS_USB is not set
# CONFIG_CAN_ESD_USB2 is not set
# CONFIG_CAN_SOFTING is not set
# CONFIG_CAN_DEBUG_DEVICES is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
# CONFIG_MTD_TESTS is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
# CONFIG_MTD_AFS_PARTS is not set
# CONFIG_MTD_AR7_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_SM_FTL is not set
# CONFIG_MTD_OOPS is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
CONFIG_MTD_CFI_INTELEXT=y
# CONFIG_MTD_CFI_AMDSTD is not set
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
CONFIG_MTD_RAM=m
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
CONFIG_MTD_PHYSMAP=y
# CONFIG_MTD_PHYSMAP_COMPAT is not set
# CONFIG_MTD_ARM_INTEGRATOR is not set
CONFIG_MTD_PLATRAM=m

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_DATAFLASH is not set
# CONFIG_MTD_M25P80 is not set
# CONFIG_MTD_SST25L is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
CONFIG_MTD_NAND_ECC=m
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND=m
# CONFIG_MTD_NAND_VERIFY_WRITE is not set
# CONFIG_MTD_NAND_ECC_BCH is not set
# CONFIG_MTD_SM_COMMON is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_MTD_NAND_IDS=m
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_ALAUDA is not set
CONFIG_MTD_NAND_MXC=m
# CONFIG_MTD_ONENAND is not set

#
# LPDDR flash memory drivers
#
# CONFIG_MTD_LPDDR is not set
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_WL_THRESHOLD=4096
CONFIG_MTD_UBI_BEB_RESERVE=1
# CONFIG_MTD_UBI_GLUEBI is not set
# CONFIG_MTD_UBI_DEBUG is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
# CONFIG_BLK_DEV_CRYPTOLOOP is not set

#
# DRBD disabled because PROC_FS, INET or CONNECTOR not selected
#
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_MG_DISK is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_SENSORS_LIS3LV02D is not set
CONFIG_MISC_DEVICES=y
# CONFIG_AD525X_DPOT is not set
# CONFIG_INTEL_MID_PTI is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1780 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_TI_DAC7512 is not set
# CONFIG_BMP085 is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
CONFIG_EEPROM_AT24=y
# CONFIG_EEPROM_AT25 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# CONFIG_SENSORS_LIS3_SPI is not set
# CONFIG_SENSORS_LIS3_I2C is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
# CONFIG_SCSI_PROC_FS is not set

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
# CONFIG_MII is not set
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
CONFIG_MICREL_PHY=y
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
# CONFIG_AX88796 is not set
# CONFIG_SMC91X is not set
# CONFIG_DM9000 is not set
# CONFIG_ENC28J60 is not set
# CONFIG_ETHOC is not set
# CONFIG_SMC911X is not set
# CONFIG_SMSC911X is not set
# CONFIG_DNET is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set
# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set
# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set
# CONFIG_B44 is not set
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
# CONFIG_KS8851_MLL is not set
CONFIG_FEC=y
# CONFIG_FTMAC100 is not set
# CONFIG_NETDEV_1000 is not set
# CONFIG_NETDEV_10000 is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_WAN is not set

#
# CAIF transport drivers
#
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set

#
# Input device support
#
CONFIG_INPUT=m
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
CONFIG_INPUT_SPARSEKMAP=m

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=m
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=m
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=m
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_IMX is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=m
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_GPIO is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=m
CONFIG_SERIO_SERPORT=m
CONFIG_SERIO_LIBPS2=m
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
# CONFIG_VT is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX3107 is not set
CONFIG_SERIAL_IMX=y
CONFIG_SERIAL_IMX_CONSOLE=y
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_IFX6X60 is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
CONFIG_TTY_PRINTK=y
# CONFIG_HVC_DCC is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_RAMOOPS is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_COMPAT is not set
CONFIG_I2C_CHARDEV=m
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_DESIGNWARE is not set
# CONFIG_I2C_GPIO is not set
CONFIG_I2C_IMX=m
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
CONFIG_SPI_BITBANG=y
# CONFIG_SPI_GPIO is not set
CONFIG_SPI_IMX_VER_0_7=y
CONFIG_SPI_IMX=y
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX_PCI is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_DESIGNWARE is not set

#
# SPI Protocol Masters
#
CONFIG_SPI_SPIDEV=y
# CONFIG_SPI_TLE62X0 is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#

#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y

#
# Memory mapped GPIO drivers:
#
CONFIG_GPIO_BASIC_MMIO_CORE=m
CONFIG_GPIO_BASIC_MMIO=m
# CONFIG_GPIO_IT8761E is not set

#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_SX150X is not set
# CONFIG_GPIO_ADP5588 is not set

#
# PCI GPIO expanders:
#

#
# SPI GPIO expanders:
#
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_74X164 is not set

#
# AC97 GPIO expanders:
#

#
# MODULbus GPIO expanders:
#
CONFIG_W1=y

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_DS2490 is not set
# CONFIG_W1_MASTER_DS2482 is not set
CONFIG_W1_MASTER_MXC=y
# CONFIG_W1_MASTER_DS1WM is not set
# CONFIG_W1_MASTER_GPIO is not set

#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=m
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2408 is not set
# CONFIG_W1_SLAVE_DS2423 is not set
CONFIG_W1_SLAVE_DS2431=m
CONFIG_W1_SLAVE_DS2433=m
CONFIG_W1_SLAVE_DS2433_CRC=y
CONFIG_W1_SLAVE_DS2760=m
# CONFIG_W1_SLAVE_DS2780 is not set
CONFIG_W1_SLAVE_BQ27000=m
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
CONFIG_IMX2_WDT=y

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y

#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set
CONFIG_MFD_SUPPORT=y
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_ASIC3 is not set
# CONFIG_HTC_EGPIO is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_T7L66XB is not set
# CONFIG_MFD_TC6387XB is not set
# CONFIG_MFD_TC6393XB is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_MC13XXX is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_DRM is not set
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set
# CONFIG_SOUND is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=m
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=m
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set

#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE is not set

#
# Special HID drivers
#
# CONFIG_HID_A4TECH is not set
# CONFIG_HID_ACRUX is not set
# CONFIG_HID_APPLE is not set
# CONFIG_HID_BELKIN is not set
# CONFIG_HID_CHERRY is not set
# CONFIG_HID_CHICONY is not set
# CONFIG_HID_CYPRESS is not set
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_EZKEY is not set
# CONFIG_HID_KEYTOUCH is not set
# CONFIG_HID_KYE is not set
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_GYRATION is not set
# CONFIG_HID_TWINHAN is not set
# CONFIG_HID_KENSINGTON is not set
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LOGITECH is not set
# CONFIG_HID_MICROSOFT is not set
# CONFIG_HID_MONTEREY is not set
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
# CONFIG_HID_PANTHERLORD is not set
# CONFIG_HID_PETALYNX is not set
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_QUANTA is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_ROCCAT_ARVO is not set
# CONFIG_HID_ROCCAT_KONE is not set
# CONFIG_HID_ROCCAT_KONEPLUS is not set
# CONFIG_HID_ROCCAT_KOVAPLUS is not set
# CONFIG_HID_ROCCAT_PYRA is not set
# CONFIG_HID_SAMSUNG is not set
# CONFIG_HID_SONY is not set
# CONFIG_HID_SUNPLUS is not set
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
# CONFIG_USB_ARCH_HAS_OHCI is not set
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_DEVICE_CLASS is not set
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_MXC=y
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HWA_HCD is not set
# CONFIG_USB_MUSB_HDRC is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=m
# CONFIG_USB_EZUSB is not set
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIEMENS_MPI is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_VIVOPAY_SERIAL is not set
# CONFIG_USB_SERIAL_ZIO is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
CONFIG_USB_ULPI=y
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_LM3530 is not set
# CONFIG_LEDS_PCA9532 is not set
CONFIG_LEDS_GPIO=y
CONFIG_LEDS_GPIO_PLATFORM=y
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_LP5523 is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_DAC124S085 is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_LEDS_LT3593 is not set
CONFIG_LEDS_TRIGGERS=y

#
# LED Triggers
#
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
CONFIG_LEDS_TRIGGER_GPIO=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m

#
# iptables trigger is under Netfilter config (LED target)
#
# CONFIG_NFC_DEVICES is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
CONFIG_RTC_DRV_PCF8563=y
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_DS3234 is not set
# CONFIG_RTC_DRV_PCF2123 is not set

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
CONFIG_RTC_MXC=y
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
# CONFIG_DW_DMAC is not set
# CONFIG_MX3_IPU is not set
# CONFIG_TIMB_DMA is not set
CONFIG_IMX_SDMA=m
CONFIG_DMA_ENGINE=y

#
# DMA Clients
#
# CONFIG_NET_DMA is not set
# CONFIG_ASYNC_TX_DMA is not set
# CONFIG_DMATEST is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set
CONFIG_CLKDEV_LOOKUP=y
CONFIG_CLKSRC_MMIO=y

#
# File systems
#
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_FS_POSIX_ACL is not set
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_JFFS2_FS is not set
CONFIG_UBIFS_FS=y
CONFIG_UBIFS_FS_XATTR=y
CONFIG_UBIFS_FS_ADVANCED_COMPR=y
CONFIG_UBIFS_FS_LZO=y
CONFIG_UBIFS_FS_ZLIB=y
# CONFIG_UBIFS_FS_DEBUG is not set
# CONFIG_LOGFS is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=m
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=m
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
# CONFIG_MAGIC_SYSRQ_FORCE_PRINTK is not set
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_SLAB is not set
# CONFIG_DEBUG_KMEMLEAK is not set
CONFIG_DEBUG_PREEMPT=y
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_INFO_REDUCED is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_WRITECOUNT is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=60
CONFIG_RCU_CPU_STALL_VERBOSE=y
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
# CONFIG_SYSCTL_SYSCALL_CHECK is not set
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_STRICT_DEVMEM is not set
# CONFIG_ARM_UNWIND is not set
# CONFIG_DEBUG_USER is not set
# CONFIG_DEBUG_LL is not set
# CONFIG_OC_ETM is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP=m
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
# CONFIG_CRYPTO_AES is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_ZLIB=m
CONFIG_CRYPTO_LZO=y

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
CONFIG_CRYPTO_HW=y
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_RATIONAL=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
# CONFIG_XZ_DEC is not set
# CONFIG_XZ_DEC_BCJ is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_NLATTR=y
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_AVERAGE is not set

Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

Hi Steve,

On 02/02/2012 07:10 PM, Steven Rostedt wrote:
> That said, as I think I know the problem, can you try this patch to see
> if it fixes things. This patch is a TOTAL HACK! Not for inclusion. It's
> racy and buggy. I didn't even compile it because I couldn't get the
> configs to enable FEC, and I was too lazy to set up my cross compiler to
> test it. ;-)

Yes, this hack fixes things as long as I boot with the Ethernet cable plugged in. In 
this case the autonegotiation is launched and fec_enet_start_xmit() waits until it 
completes. From then on, the hack never triggers again (comp_set is 0) and 
disconnecting-reconnecting the cable or asking for a new DHCP address seems to work 
normally.

If I boot with the cable disconnected the driver seems to be trapped at the 
wait_for_completion() and connecting the cable later simply doesn't allow the 
autonegotiation to complete.

-- 
Héctor Palacios

> diff --git a/drivers/net/fec.c b/drivers/net/fec.c
> index 885d8ba..9368dc2 100644
> --- a/drivers/net/fec.c
> +++ b/drivers/net/fec.c
> @@ -231,6 +231,9 @@ static void *swap_buffer(void *bufaddr, int len)
>   	return bufaddr;
>   }
>
> +static DECLARE_COMPLETION(kick_ksoftirq);
> +static int comp_set;
> +
>   static netdev_tx_t
>   fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>   {
> @@ -243,6 +246,9 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>   	unsigned long flags;
>
>   	if (!fep->link) {
> +		if (comp_set)
> +			wait_for_completion(&kick_ksoftirq);
> +
>   		/* Link is down or autonegotiation is in progress. */
>   		return NETDEV_TX_BUSY;
>   	}
> @@ -794,6 +800,8 @@ static void fec_enet_adjust_link(struct net_device *ndev)
>   	/* Link on or off change */
>   	if (phy_dev->link != fep->link) {
>   		fep->link = phy_dev->link;
> +		complete(&kick_ksoftirq);
> +		comp_set = 0;
>   		if (phy_dev->link)
>   			fec_restart(ndev, phy_dev->duplex);
>   		else
> @@ -914,6 +922,9 @@ static int fec_enet_mii_probe(struct net_device *ndev)
>   	fep->link = 0;
>   	fep->full_duplex = 0;
>
> +	init_completion(&kick_ksoftirq);
> +	comp_set = 1;
> +
>   	printk(KERN_INFO "%s: Freescale FEC PHY driver [%s] "
>   		"(mii_bus:phy_addr=%s, irq=%d)\n", ndev->name,
>   		fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev),
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

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Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

[-- Attachment #1: Type: text/plain, Size: 1996 bytes --]

On 02/02/2012 09:13 PM, Uwe Kleine-König wrote:
> On Thu, Feb 02, 2012 at 01:38:44PM +0100, Tim Sander wrote:
>> Hi
>>> When booting my platform with DHCP on, the DHCP request is sent by the
>>> network driver before the PHY has even started the autonegotiation.
>>> Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY
>>> but the softirq [sirq-net-tx] seems to have entered an infinite spin, as
>>> my system is practically hung and 'top' reveals [sirq-net-tx/0] is
>>> consuming 95% of CPU. This is preventing the PHY autonegotiation (which is
>>> scheduled as a delayed work) to start, so the PHY is never ready and the
>>> packet never reaches the network.
>> Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is
>> enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
> I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can you
> provide me your config. Does the problem occur on every boot for you? If
> not, how often do I need to reboot?

On my ARM iMX51 platform the problem occurs on every boot. Basically I'm launching 
udhcpc on the /etc/network/if-up.d/ifup script, to get a dynamic IP for the FEC.

> @Hector: Greeting to Spain. I don't have an imx51 machine handy, but
> your config and your answers on my questions might help, too.

Hello Uwe, hope you're doing well.
Apart from the fact that the fec.c driver is checking the link on the 
fec_enet_start_xmit() function and returning NETDEV_TX_BUSY if there's no link, it 
always seemed to me that this driver takes ages to autonegotiate with the PHY (2-3 
seconds), which might be also a reason why this race happens in this platform (in any 
iMX platform with the FEC, actually).

If booting with static IP, it takes this time (2-3 seconds) from when the ifup script 
is run until I see the message from the PHY reporting Link is ON. From then on, I can 
request a DHCP address and work normally.

Attached my kernel config.
-- 
Héctor Palacios

[-- Attachment #2: hector_palacios_kernelconfig --]
[-- Type: text/plain, Size: 40116 bytes --]

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.31.14-rt21
# Tue Jan 31 11:26:17 2012
#

#
# Linux Kernel Configuration
#

#
# Kernel Extra options
#
CONFIG_LINUX_IMAGE_NAME="uImage-ccmx51js"
CONFIG_ARM=y
CONFIG_HAVE_PWM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_GENERIC_GPIO=y
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_MMU=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ZONE_DMA=y
CONFIG_ARCH_MTD_XIP=y
CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_CONSTRUCTORS=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set

#
# RCU Subsystem
#
# CONFIG_CLASSIC_RCU is not set
# CONFIG_TREE_RCU is not set
CONFIG_PREEMPT_RCU=y
# CONFIG_RCU_TRACE is not set
# CONFIG_TREE_RCU_TRACE is not set
# CONFIG_PREEMPT_RCU_TRACE is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_GROUP_SCHED is not set
# CONFIG_CGROUPS is not set
# CONFIG_SYSFS_DEPRECATED_V2 is not set
# CONFIG_RELAY is not set
# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_EMBEDDED=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y

#
# Performance Counters
#
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
# CONFIG_PROFILING is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y

#
# GCOV-based kernel profiling
#
# CONFIG_SLOW_WORK is not set
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_BLOCK=y
CONFIG_LBDAF=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
# CONFIG_DEFAULT_DEADLINE is not set
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
CONFIG_FREEZER=y

#
# System Type
#
# CONFIG_ARCH_AAEC2000 is not set
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_REALVIEW is not set
# CONFIG_ARCH_VERSATILE is not set
# CONFIG_ARCH_AT91 is not set
# CONFIG_ARCH_CLPS711X is not set
# CONFIG_ARCH_GEMINI is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
CONFIG_ARCH_MXC=y
# CONFIG_ARCH_STMP3XXX is not set
# CONFIG_ARCH_MXS is not set
# CONFIG_ARCH_NETX is not set
# CONFIG_ARCH_H720X is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP23XX is not set
# CONFIG_ARCH_IXP2000 is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_L7200 is not set
# CONFIG_ARCH_KIRKWOOD is not set
# CONFIG_ARCH_LOKI is not set
# CONFIG_ARCH_MV78XX0 is not set
# CONFIG_ARCH_ORION5X is not set
# CONFIG_ARCH_MMP is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_NS9XXX is not set
# CONFIG_ARCH_W90X900 is not set
# CONFIG_ARCH_PNX4008 is not set
# CONFIG_ARCH_PXA is not set
# CONFIG_ARCH_MSM is not set
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C2410 is not set
# CONFIG_ARCH_S3C64XX is not set
# CONFIG_ARCH_SHARK is not set
# CONFIG_ARCH_LH7A40X is not set
# CONFIG_ARCH_U300 is not set
# CONFIG_ARCH_DAVINCI is not set
# CONFIG_ARCH_OMAP is not set
CONFIG_IRAM_ALLOC=y
CONFIG_DMA_ZONE_SIZE=96
CONFIG_UTMI_MXC=y

#
# Freescale MXC Implementations
#
# CONFIG_ARCH_MX1 is not set
# CONFIG_ARCH_MX2 is not set
# CONFIG_ARCH_MX3 is not set
# CONFIG_ARCH_MX25 is not set
# CONFIG_ARCH_MX35 is not set
# CONFIG_ARCH_MX37 is not set
CONFIG_ARCH_MX5=y
CONFIG_MXC_SDMA_API=y
CONFIG_SDMA_IRAM=y
CONFIG_I2C_MXC_SELECT1=y
CONFIG_I2C_MXC_SELECT2=y
# CONFIG_I2C_MXC_SELECT3 is not set
CONFIG_FORCE_MAX_ZONEORDER=13
CONFIG_ARCH_MXC_HAS_NFC_V3=y
CONFIG_ARCH_MX51=y
# CONFIG_ARCH_MX53 is not set
CONFIG_MX5_OPTIONS=y
# CONFIG_MACH_MX51_3DS is not set
# CONFIG_MACH_MX51_BABBAGE is not set
# CONFIG_MACH_MX53_EVK is not set
# CONFIG_MACH_MX50_ARM2 is not set
CONFIG_MODULE_CCXMX51=y
CONFIG_LATE_CPU_CLK_ENABLE=y
# CONFIG_MACH_CCWMX51JS is not set
# CONFIG_MACH_CCWMX51 is not set
# CONFIG_MACH_CCMX51JS is not set
# CONFIG_MACH_CCMX51 is not set
CONFIG_MACH_CCMX51_STJUDE=y
# CONFIG_JSCCWMX51_V1 is not set
# CONFIG_JSCCWMX51_V2 is not set
CONFIG_JSCCWMX51_CUSTOM=y

#
# MX5x Options:
#
CONFIG_MXC_NAND_SWAP_BI=y
CONFIG_ARCH_MXC_HAS_NFC_V3_2=y

#
# Serial Port Options
#
CONFIG_UART1_ENABLED=y
CONFIG_UART1_2WIRE_ENABLED=y
# CONFIG_UART1_CTS_RTS_ENABLED is not set
# CONFIG_UART1_FULL_UART_ENABLED is not set
# CONFIG_UART1_IRDA_ENABLED is not set
CONFIG_UART2_ENABLED=y
# CONFIG_UART2_CTS_RTS_ENABLED is not set
# CONFIG_UART2_IRDA_ENABLED is not set
CONFIG_UART3_ENABLED=y
# CONFIG_UART3_CTS_RTS_ENABLED is not set
# CONFIG_UART3_IRDA_ENABLED is not set

#
# SPI Interface Options
#
CONFIG_SPI_MXC_WAIT_CYCLES=0
CONFIG_SPI_MXC_SELECT1=y
CONFIG_SPI_MXC_SELECT1_SS1=y
CONFIG_SPI_MXC_SELECT2=y
CONFIG_SPI_MXC_SELECT3=y

#
# I2C Interface options
#

#
# SD/MMC Interface options
#
# CONFIG_ESDHCI_MXC_SELECT1 is not set
CONFIG_ESDHCI_MXC_SELECT3=y

#
# Video Interface(s)
#
CONFIG_CCWMX51_DEFAULT_VIDEO_32BPP=y
# CONFIG_CCWMX51_DEFAULT_VIDEO_16BPP is not set
CONFIG_CCWMX51_DEFAULT_VIDEO_BPP=32
CONFIG_CCWMX51_DISP0=y
# CONFIG_CCWMX51_DISP0_RGB888 is not set
# CONFIG_CCWMX51_DISP0_RGB666 is not set

#
# To enable the Display 2 Video interface, disable the FEC (under network drivers)
#

#
# and set 18bit color mode for the Display 1
#
# CONFIG_CCWMX51_SECOND_TOUCH is not set
CONFIG_MXC_TZIC=y
CONFIG_ISP1504_MXC=y
# CONFIG_MXC_IRQ_PRIOR is not set
CONFIG_MXC_PWM=y
# CONFIG_MXC_DVFS_PER is not set

#
# Processor Type
#
CONFIG_CPU_32=y
CONFIG_CPU_32v6K=y
CONFIG_CPU_V7=y
CONFIG_CPU_32v7=y
CONFIG_CPU_ABRT_EV7=y
CONFIG_CPU_PABRT_IFAR=y
CONFIG_CPU_CACHE_V7=y
CONFIG_CPU_CACHE_VIPT=y
CONFIG_CPU_COPY_V6=y
CONFIG_CPU_TLB_V7=y
CONFIG_CPU_HAS_ASID=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y

#
# Processor Features
#
CONFIG_ARM_THUMB=y
# CONFIG_ARM_THUMBEE is not set
# CONFIG_CPU_ICACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_CPU_BPREDICT_DISABLE is not set
CONFIG_HAS_TLS_REG=y
CONFIG_ARM_ERRATA_430973=y
CONFIG_ARM_ERRATA_458693=y
CONFIG_ARM_ERRATA_460075=y

#
# Bus support
#
# CONFIG_PCI_SYSCALL is not set
# CONFIG_ARCH_SUPPORTS_MSI is not set
# CONFIG_PCCARD is not set

#
# Kernel Features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT_DESKTOP is not set
CONFIG_PREEMPT_RT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_SOFTIRQS=y
CONFIG_PREEMPT_HARDIRQS=y
CONFIG_HZ=100
CONFIG_AEABI=y
# CONFIG_OABI_COMPAT is not set
# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
# CONFIG_HIGHMEM is not set
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_HAVE_MLOCK=y
CONFIG_HAVE_MLOCKED_PAGE_BIT=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_LEDS is not set
CONFIG_ALIGNMENT_TRAP=y
# CONFIG_UACCESS_WITH_MEMCPY is not set

#
# Boot options
#
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE=""
# CONFIG_XIP_KERNEL is not set
# CONFIG_KEXEC is not set

#
# CPU Power Management
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_STAT_DETAILS is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
CONFIG_CPU_FREQ_GOV_USERSPACE=y
# CONFIG_CPU_FREQ_GOV_ONDEMAND is not set
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_IMX=y
# CONFIG_CPU_IDLE is not set

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
CONFIG_VFP=y
CONFIG_VFPv3=y
CONFIG_NEON=y

#
# Userspace binary formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set

#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
# CONFIG_APM_EMULATION is not set
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
# CONFIG_MTD_CONCAT is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_TESTS is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
# CONFIG_MTD_AFS_PARTS is not set
# CONFIG_MTD_AR7_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_MTD_OOPS is not set

#
# RAM/ROM/Flash chip drivers
#
# CONFIG_MTD_CFI is not set
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PLATRAM is not set
# CONFIG_MTD_MXC is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_DATAFLASH is not set
# CONFIG_MTD_MXC_DATAFLASH is not set
# CONFIG_MTD_M25P80 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_VERIFY_WRITE is not set
# CONFIG_MTD_NAND_ECC_SMC is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_MTD_NAND_IDS=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_IMX_NFC is not set
CONFIG_MTD_NAND_MXC_V3=y
# CONFIG_MTD_NAND_MXC_SWECC is not set
# CONFIG_MTD_NAND_MXC_FORCE_CE is not set
# CONFIG_MXC_NAND_LOW_LEVEL_ERASE is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_ALAUDA is not set
# CONFIG_MTD_ONENAND is not set

#
# LPDDR flash memory drivers
#
# CONFIG_MTD_LPDDR is not set

#
# UBI - Unsorted block images
#
# CONFIG_MTD_UBI is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_MG_DISK is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
# CONFIG_SCSI_PROC_FS is not set

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
# CONFIG_SCSI_WAIT_SCAN is not set

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
CONFIG_NETDEVICES=y
# CONFIG_DUMMY is not set
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_AX88796 is not set
# CONFIG_SMC91X is not set
# CONFIG_DM9000 is not set
# CONFIG_ENC28J60 is not set
# CONFIG_ETHOC is not set
# CONFIG_SMC911X is not set
# CONFIG_SMSC911X is not set
# CONFIG_DNET is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set
# CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set
# CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set
# CONFIG_B44 is not set
# CONFIG_CS89x0 is not set
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
CONFIG_FEC=y
# CONFIG_FEC_1588 is not set
# CONFIG_FEC2 is not set
# CONFIG_NETDEV_1000 is not set
# CONFIG_NETDEV_10000 is not set

#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_WAN is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_ISDN is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_DEVKMEM=y
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_MXC_IIM is not set
# CONFIG_IMX_SIM is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
CONFIG_SERIAL_MXC=y
CONFIG_SERIAL_MXC_CONSOLE=y
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_IMX is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_CHARDEV is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_IMX is not set
CONFIG_I2C_MXC=y
# CONFIG_I2C_MXC_HS is not set
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_SIMTEC is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_STUB is not set

#
# Miscellaneous I2C Chip support
#
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_PCF8574 is not set
# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCA9539 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
# CONFIG_I2C_SLAVE is not set
CONFIG_SPI=y
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
CONFIG_SPI_BITBANG=y
# CONFIG_SPI_GPIO is not set
CONFIG_SPI_MXC=y
# CONFIG_SPI_MXC_TEST_LOOPBACK is not set

#
# SPI Protocol Masters
#
CONFIG_SPI_SPIDEV=y
# CONFIG_SPI_TLE62X0 is not set
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
CONFIG_GPIO_SYSFS=y

#
# Memory mapped GPIO expanders:
#

#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set

#
# PCI GPIO expanders:
#

#
# SPI GPIO expanders:
#
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
CONFIG_W1=y

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_DS2490 is not set
CONFIG_W1_MASTER_DS2482=y
# CONFIG_W1_MASTER_MXC is not set
# CONFIG_W1_MASTER_GPIO is not set

#
# 1-wire Slaves
#
# CONFIG_W1_SLAVE_THERM is not set
# CONFIG_W1_SLAVE_SMEM is not set
# CONFIG_W1_SLAVE_DS2431 is not set
# CONFIG_W1_SLAVE_DS2751 is not set
# CONFIG_W1_SLAVE_DS2433 is not set
CONFIG_W1_SLAVE_DS28EC20=y
# CONFIG_W1_SLAVE_DS28EC20_CRC is not set
# CONFIG_W1_SLAVE_DS2438 is not set
# CONFIG_W1_SLAVE_DS2760 is not set
# CONFIG_W1_SLAVE_BQ27000 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_THERMAL_HWMON is not set
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_NOWAYOUT=y

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_MXC_WATCHDOG=y

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_ASIC3 is not set
# CONFIG_HTC_EGPIO is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_TPS65010 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_TC6393XB is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_AB3100_CORE is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
CONFIG_FB=y
# CONFIG_FIRMWARE_EDID is not set
# CONFIG_FB_DDC is not set
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
# CONFIG_FB_SYS_FILLRECT is not set
# CONFIG_FB_SYS_COPYAREA is not set
# CONFIG_FB_SYS_IMAGEBLIT is not set
# CONFIG_FB_FOREIGN_ENDIAN is not set
# CONFIG_FB_SYS_FOPS is not set
# CONFIG_FB_SVGALIB is not set
# CONFIG_FB_MACMODES is not set
# CONFIG_FB_BACKLIGHT is not set
CONFIG_FB_MODE_HELPERS=y
# CONFIG_FB_TILEBLITTING is not set

#
# Frame buffer hardware drivers
#
CONFIG_FB_MXC=y
CONFIG_FB_MXC_SYNC_PANEL=y
# CONFIG_FB_MXC_EPSON_VGA_SYNC_PANEL is not set
# CONFIG_FB_MXC_TVOUT_TVE is not set
# CONFIG_FB_MXC_LDB is not set
# CONFIG_FB_MXC_CLAA_WVGA_SYNC_PANEL is not set
# CONFIG_FB_MXC_CH7026 is not set
# CONFIG_FB_MXC_TVOUT_CH7024 is not set
# CONFIG_VIDEO_AD9389 is not set
# CONFIG_FB_MXC_ASYNC_PANEL is not set
# CONFIG_FB_MXC_ELCDIF_FB is not set
# CONFIG_FB_S1D13XXX is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
# CONFIG_FB_MB862XX is not set
# CONFIG_FB_BROADSHEET is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=y
# CONFIG_LCD_LTV350QV is not set
# CONFIG_LCD_ILI9320 is not set
# CONFIG_LCD_TDO24M is not set
# CONFIG_LCD_VGG2432A4 is not set
# CONFIG_LCD_PLATFORM is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=y
# CONFIG_BACKLIGHT_GENERIC is not set
CONFIG_BACKLIGHT_PWM=y
CONFIG_BACKLIGHT_MXC=y

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE is not set
CONFIG_LOGO=y
# CONFIG_LOGO_LINUX_MONO is not set
# CONFIG_LOGO_LINUX_VGA16 is not set
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=y
CONFIG_SOUND_OSS_CORE=y
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_JACK=y
CONFIG_SND_SEQUENCER=y
# CONFIG_SND_SEQ_DUMMY is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
# CONFIG_SND_HRTIMER is not set
CONFIG_SND_DYNAMIC_MINORS=y
# CONFIG_SND_SUPPORT_OLD_API is not set
# CONFIG_SND_VERBOSE_PROCFS is not set
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
# CONFIG_SND_RAWMIDI_SEQ is not set
# CONFIG_SND_OPL3_LIB_SEQ is not set
# CONFIG_SND_OPL4_LIB_SEQ is not set
# CONFIG_SND_SBAWE_SEQ is not set
# CONFIG_SND_EMU10K1_SEQ is not set
# CONFIG_SND_DRIVERS is not set
# CONFIG_SND_ARM is not set
# CONFIG_SND_SPI is not set
# CONFIG_SND_USB is not set
CONFIG_SND_SOC=y
CONFIG_SND_MXC_SOC=y
CONFIG_SND_MXC_SOC_SSI=y
# CONFIG_SND_MXC_SOC_IRAM is not set
CONFIG_SND_SOC_IMX_3STACK_SGTL5000=y
# CONFIG_SND_SOC_IMX_3STACK_AK4647 is not set
# CONFIG_SND_SOC_IMX_3STACK_WM8580 is not set
# CONFIG_SND_SOC_IMX_CCWMX51_WM8753 is not set
# CONFIG_SND_SOC_IMX_3STACK_AK5702 is not set
# CONFIG_SND_SOC_IMX_3STACK_BLUETOOTH is not set
# CONFIG_SND_SOC_IMX_3STACK_CS42888 is not set
CONFIG_SND_SOC_I2C_AND_SPI=y
# CONFIG_SND_SOC_ALL_CODECS is not set
CONFIG_SND_SOC_SGTL5000=y
# CONFIG_SOUND_PRIME is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
# CONFIG_USB_ARCH_HAS_OHCI is not set
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set

#
# Miscellaneous USB options
#
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_DEVICE_CLASS is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_OTG is not set
# CONFIG_USB_OTG_WHITELIST is not set
CONFIG_USB_OTG_BLACKLIST_HUB=y
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ARC=y
# CONFIG_USB_EHCI_ARC_H1 is not set
CONFIG_USB_EHCI_ARC_OTG=y
# CONFIG_USB_STATIC_IRAM is not set
# CONFIG_USB_EHCI_FSL_MC13783 is not set
# CONFIG_USB_EHCI_FSL_1301 is not set
# CONFIG_USB_EHCI_FSL_1504 is not set
CONFIG_USB_EHCI_FSL_UTMI=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_VST is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_NOP_USB_XCEIV is not set
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_UNSAFE_RESUME=y

#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_SDHCI is not set
# CONFIG_MMC_MXC is not set
# CONFIG_MMC_SPI is not set
CONFIG_MMC_IMX_ESDHCI=y
# CONFIG_MMC_IMX_ESDHCI_PIO_MODE is not set
# CONFIG_MEMSTICK is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_NEW_LEDS is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_DS3234 is not set

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_RTC_MXC is not set
# CONFIG_RTC_DRV_MXC_V2 is not set
# CONFIG_RTC_DRV_IMXDI is not set
CONFIG_RTC_MC13892=y
# CONFIG_DMADEVICES is not set
# CONFIG_AUXDISPLAY is not set
CONFIG_REGULATOR=y
# CONFIG_REGULATOR_DEBUG is not set
# CONFIG_REGULATOR_FIXED_VOLTAGE is not set
# CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set
# CONFIG_REGULATOR_USERSPACE_CONSUMER is not set
# CONFIG_REGULATOR_BQ24022 is not set
# CONFIG_REGULATOR_MAX1586 is not set
# CONFIG_REGULATOR_LP3971 is not set
CONFIG_REGULATOR_MC13892=y
# CONFIG_REGULATOR_MAX17135 is not set
# CONFIG_UIO is not set
# CONFIG_STAGING is not set

#
# MXC support drivers
#
CONFIG_MXC_IPU=y
CONFIG_MXC_IPU_V3=y

#
# MXC SSI support
#
# CONFIG_MXC_SSI is not set

#
# MXC Digital Audio Multiplexer support
#
# CONFIG_MXC_DAM is not set

#
# MXC PMIC support
#
CONFIG_MXC_PMIC=y
# CONFIG_MXC_PMIC_MC13783 is not set
CONFIG_MXC_PMIC_MC13892=y
# CONFIG_MXC_PMIC_I2C is not set
CONFIG_MXC_PMIC_SPI=y
# CONFIG_MXC_PMIC_MC34704 is not set
# CONFIG_MXC_PMIC_MC9SDZ60 is not set
# CONFIG_MXC_PMIC_CHARDEV is not set

#
# MXC PMIC Client Drivers
#
# CONFIG_MXC_MC13892_ADC is not set
# CONFIG_MXC_MC13892_RTC is not set
# CONFIG_MXC_MC13892_LIGHT is not set
# CONFIG_MXC_MC13892_BATTERY is not set
# CONFIG_MXC_MC13892_CONNECTIVITY is not set
# CONFIG_MXC_MC13892_POWER is not set
# CONFIG_MXC_PMIC_MC9S08DZ60 is not set

#
# MXC Security Drivers
#
# CONFIG_MXC_SECURITY_SCC is not set
# CONFIG_MXC_SECURITY_SCC2 is not set

#
# SAHARA2 Security Hardware Support
#
# CONFIG_MXC_SAHARA is not set

#
# MXC MPEG4 Encoder Kernel module support
#
# CONFIG_MXC_HMP4E is not set

#
# MXC HARDWARE EVENT
#
# CONFIG_MXC_HWEVENT is not set

#
# MXC VPU(Video Processing Unit) support
#
CONFIG_MXC_VPU=y
CONFIG_MXC_VPU_IRAM=y
# CONFIG_MXC_VPU_DEBUG is not set

#
# MXC Asynchronous Sample Rate Converter support
#

#
# MXC Bluetooth support
#

#
# Broadcom GPS ioctrl support
#

#
# MXC Media Local Bus Driver
#

#
# i.MX ADC support
#
# CONFIG_IMX_ADC is not set

#
# MXC GPU support
#
CONFIG_MXC_AMD_GPU=y

#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4_FS is not set
CONFIG_JBD=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
# CONFIG_BTRFS_FS is not set
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
# CONFIG_INOTIFY is not set
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
# CONFIG_MSDOS_FS is not set
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
CONFIG_JFFS2_SUMMARY=y
# CONFIG_JFFS2_FS_XATTR is not set
# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
CONFIG_JFFS2_ZLIB=y
# CONFIG_JFFS2_LZO is not set
CONFIG_JFFS2_RTIME=y
# CONFIG_JFFS2_RUBIN is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NILFS2_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
# CONFIG_NFS_V4 is not set
CONFIG_ROOT_NFS=y
# CONFIG_NFSD is not set
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
# CONFIG_RPCSEC_GSS_KRB5 is not set
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=y
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=y
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=y
# CONFIG_DLM is not set

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_ENABLE_WARN_DEPRECATED is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=1024
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_LATENCYTOP is not set
CONFIG_SYSCTL_SYSCALL_CHECK=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
CONFIG_TMPFSDEV=y
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_ARM_UNWIND=y
# CONFIG_DEBUG_USER is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
# CONFIG_CRYPTO_FIPS is not set
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_TEST is not set
# CONFIG_CRYPTO_CRYPTODEV is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
# CONFIG_CRYPTO_CBC is not set
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
CONFIG_CRYPTO_ECB=y
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_MD4 is not set
# CONFIG_CRYPTO_MD5 is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_ARC4=y
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_ZLIB is not set
# CONFIG_CRYPTO_LZO is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_HW is not set
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_LAST_BIT=y
# CONFIG_CRC_CCITT is not set
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_DECOMPRESS_GZIP=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_NLATTR=y

Re: infinite spin in RT when booting with DHCP on

[Uwe Kleine-König]

Hey Hector,

On Fri, Feb 03, 2012 at 11:23:24AM +0100, Hector Palacios wrote:
> On 02/02/2012 09:13 PM, Uwe Kleine-König wrote:
> >On Thu, Feb 02, 2012 at 01:38:44PM +0100, Tim Sander wrote:
> >>Hi
> >>>When booting my platform with DHCP on, the DHCP request is sent by the
> >>>network driver before the PHY has even started the autonegotiation.
> >>>Since the PHY is not ready, the TX interrupt returns with NETDEV_TX_BUSY
> >>>but the softirq [sirq-net-tx] seems to have entered an infinite spin, as
> >>>my system is practically hung and 'top' reveals [sirq-net-tx/0] is
> >>>consuming 95% of CPU. This is preventing the PHY autonegotiation (which is
> >>>scheduled as a delayed work) to start, so the PHY is never ready and the
> >>>packet never reaches the network.
> >>Mh, i think i am hit by the same problem. I have a i.mx 35 and when dhcp is
> >>enabled the ksoftirq is also running wild with 3.0-rt. This also happens when
> >I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can you
> >provide me your config. Does the problem occur on every boot for you? If
> >not, how often do I need to reboot?
> 
> On my ARM iMX51 platform the problem occurs on every boot. Basically
> I'm launching udhcpc on the /etc/network/if-up.d/ifup script, to get
> a dynamic IP for the FEC.
Maybe your environment is special then (pick one or more from: board,
cable, phy, hub/switch, sun erruption, ice cream on your board or your
favourite hardware designer :-).

As the problem occurs for you on every boot you seem to be the one who
can debug that easily. Can you check if mainline is affected, too, after
boosting ksoftirqd? I.e. either use

	chrt -f -p 99 $(pidof ksoftirqd)

or add

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 4eb3a0f..d08c046 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -861,6 +861,10 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
 			printk("ksoftirqd for %i failed\n", hotcpu);
 			return notifier_from_errno(PTR_ERR(p));
 		}
+		sched_setscheduler_nocheck(p, SCHED_FIFO, &(struct sched_param){
+				.sched_priority = MAX_RT_PRIO-1,
+				});
+
 		kthread_bind(p, hotcpu);
   		per_cpu(ksoftirqd, hotcpu) = p;
  		break;

to your tree, whatever is easier for you.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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Re: infinite spin in RT when booting with DHCP on

[John Ogness]

Hi,

Unfortunately I don't have time to look into this right now. But this
problem really reminds of a problem in 2010 we had with the FEC driver
that was also related to early network traffic causing the kernel to
hang. The commit in git to fix it is:

03c698c93fc15d976738a853a7ccb6ea26396003

Perhaps this is the same problem in a different costume.

John Ogness

Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Fri, 2012-02-03 at 11:09 +0100, Hector Palacios wrote:
> Hi Steve,
> 
> On 02/02/2012 07:10 PM, Steven Rostedt wrote:
> > That said, as I think I know the problem, can you try this patch to see
> > if it fixes things. This patch is a TOTAL HACK! Not for inclusion. It's
> > racy and buggy. I didn't even compile it because I couldn't get the
> > configs to enable FEC, and I was too lazy to set up my cross compiler to
> > test it. ;-)
> 
> Yes, this hack fixes things as long as I boot with the Ethernet cable plugged in. In 
> this case the autonegotiation is launched and fec_enet_start_xmit() waits until it 
> completes. From then on, the hack never triggers again (comp_set is 0) and 
> disconnecting-reconnecting the cable or asking for a new DHCP address seems to work 
> normally.
> 
> If I boot with the cable disconnected the driver seems to be trapped at the 
> wait_for_completion() and connecting the cable later simply doesn't allow the 
> autonegotiation to complete.

I said it was buggy ;-)


Well the good news is that we know where the problem is. The bad news
is, I have no idea how to fix it, as it seems specific to this driver.
And this bug may be a bug in mainline. If we can prove that, then we can
push the driver writers to fix it.

If you can add the patch that Uwe sent you and see if you can cause
mainline to lock up with it, then we can show that this is a mainline
bug.

Basically, if you have CONFIG_PREEMPT enabled, and set ksoftirqd to an
RT task, then it may exhibit the same behavior.

Oh! What happens if you boot the board with a mainline kernel without
connecting the cable? Can you see if ksoftirqd is running 100% of CPU?
If you say that when the cable is out, it can not complete the
autonegotiate, which means that it should go into the loop I shown
before. But as ksoftirqd is a normal task (non RT) you may not have
noticed the issue.

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

Hi Uwe,

On 02/03/2012 11:35 AM, Uwe Kleine-König wrote:
>> On my ARM iMX51 platform the problem occurs on every boot. Basically
>> I'm launching udhcpc on the /etc/network/if-up.d/ifup script, to get
>> a dynamic IP for the FEC.
> Maybe your environment is special then (pick one or more from: board,
> cable, phy, hub/switch, sun erruption, ice cream on your board or your
> favourite hardware designer :-).

No ice cream this time, promised!

> As the problem occurs for you on every boot you seem to be the one who
> can debug that easily. Can you check if mainline is affected, too, after
> boosting ksoftirqd? I.e. either use
>
> 	chrt -f -p 99 $(pidof ksoftirqd)
>
> or add
 > diff --git a/kernel/softirq.c b/kernel/softirq.c
 > index 4eb3a0f..d08c046 100644
 > --- a/kernel/softirq.c
 > +++ b/kernel/softirq.c
 > @@ -861,6 +861,10 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
 >   			printk("ksoftirqd for %i failed\n", hotcpu);
 >   			return notifier_from_errno(PTR_ERR(p));
 >   		}
 > +		sched_setscheduler_nocheck(p, SCHED_FIFO,&(struct sched_param){
 > +				.sched_priority = MAX_RT_PRIO-1,
 > +				});
 > +
 >   		kthread_bind(p, hotcpu);
 >     		per_cpu(ksoftirqd, hotcpu) = p;
 >    		break;

I added this patch and the problem was reproducible in 2.6.31.14. with Freescale's 
2.6.31 BSP, but not on 2.6.35.15 with Freescale's 2.6.35 BSP.

So I revised the differences in the driver and 'git blame' showed me this commit 
(Freescale's BSP for 2.6.35), which solves the problem:

commit bac5b435af4656802d3555aaeee983ae8fe5c96a
Author: Frank Li <Frank.Li@freescale.com>
Date:   Fri Dec 10 18:59:07 2010 +0800

     ENGR00136218 FEC: Fix dhcp fail when enable preempt at mx28

     DHCP fail when enable NO_HZ and preempt at mx28evk

     Signed-off-by: Zeng Zhaoming <b32542@freescale.com>
     Signed-off-by: Frank Li <Frank.Li@freescale.com>

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index e3ce064..f581960 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -253,6 +253,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)

         if (!fep->link) {
                 /* Link is down or autonegotiation is in progress. */
+               netif_stop_queue(dev);
                 return NETDEV_TX_BUSY;
         }

@@ -681,6 +682,7 @@ static void fec_enet_adjust_link(struct net_device *dev)
         if (phy_dev->link) {
                 if (fep->full_duplex != phy_dev->duplex) {
                         fec_restart(dev, phy_dev->duplex);
+                       netif_wake_queue(dev);
                         status_change = 1;
                 }
         }
@@ -1418,6 +1420,8 @@ fec_stop(struct net_device *dev)
         if (fep->ptimer_present)
                 fec_ptp_stop(fep->ptp_priv);
         writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
+
+       fep->link = 0;
  }

  static int __devinit


This commit was not merged to mainline kernel. So I tried again with 2.6.35.14 with 
Freescale's BSP and Uwe's patch and reverted commit bac5b435 for verification. The 
problem was reproducible so the above patch solves it.
Do you see any caveat with this commit? If not maybe it should make its way to mainline.

Regards
-- 
Héctor Palacios
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Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Fri, 2012-02-03 at 17:14 +0100, Hector Palacios wrote:

> This commit was not merged to mainline kernel. So I tried again with 2.6.35.14 with 
> Freescale's BSP and Uwe's patch and reverted commit bac5b435 for verification. The 
> problem was reproducible so the above patch solves it.
> Do you see any caveat with this commit? If not maybe it should make its way to mainline.

I would definitely push this towards mainline. Can you apply it to the
-rt patch too. I bet you it fixes it there too.

I wont add it unless it either goes into mainline, or Thomas takes it
into the 3.2-rt release. That's the stable-rt rule.

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

On 02/03/2012 05:43 PM, Steven Rostedt wrote:
> On Fri, 2012-02-03 at 17:14 +0100, Hector Palacios wrote:
>
>> This commit was not merged to mainline kernel. So I tried again with 2.6.35.14 with
>> Freescale's BSP and Uwe's patch and reverted commit bac5b435 for verification. The
>> problem was reproducible so the above patch solves it.
>> Do you see any caveat with this commit? If not maybe it should make its way to mainline.
>
> I would definitely push this towards mainline. Can you apply it to the
> -rt patch too. I bet you it fixes it there too.

I forgot to say it. Yes, it fixes it in -rt as well.

> I wont add it unless it either goes into mainline, or Thomas takes it
> into the 3.2-rt release. That's the stable-rt rule.

There doesn't seem to be a maintainer for this driver... should I take the action of 
posting this to the mainline kernel list?

Thank you for the help, gentlemen.
-- 
Héctor Palacios
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Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Fri, 2012-02-03 at 18:25 +0100, Hector Palacios wrote:

> > I would definitely push this towards mainline. Can you apply it to the
> > -rt patch too. I bet you it fixes it there too.
> 
> I forgot to say it. Yes, it fixes it in -rt as well.

Great to hear! Tim, can you test this patch out too?

> 
> > I wont add it unless it either goes into mainline, or Thomas takes it
> > into the 3.2-rt release. That's the stable-rt rule.
> 
> There doesn't seem to be a maintainer for this driver... should I take the action of 
> posting this to the mainline kernel list?

I would send a note to LKML asking why this hasn't been included in
mainline, and Cc the following:

Frank Li <Frank.Li@freescale.com>
Zeng Zhaoming <b32542@freescale.com>
David S. Miller <davem@davemloft.net>

And perhaps:

Shawn Guo <shawn.guo@linaro.org>
Xiao Jiang <jgq516@gmail.com>

As they have done some work on the fec driver recently.

You can also Cc myself, Thomas, Tim and Uwe.

Note that you see that this causes a hang in the system if ksoftirqd is
a real time task. Not to mention, that ksoftirqd spins in an infinite
loop if the cable isn't connected (regardless of ksoftirqd's priority).

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Uwe Kleine-König]

Hi,

On Fri, Feb 03, 2012 at 12:39:49PM -0500, Steven Rostedt wrote:
> > There doesn't seem to be a maintainer for this driver... should I take the action of 
> > posting this to the mainline kernel list?
> 
> I would send a note to LKML asking why this hasn't been included in
> mainline, and Cc the following:
AFAICT Hector found the patch in a Vendor BSP. I guess they never
forwarded it and so none of the open source guys is to blame. (Note I
didn't check that, but I'd be surprised if I were wrong.)

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Fri, 2012-02-03 at 20:25 +0100, Uwe Kleine-König wrote:

> AFAICT Hector found the patch in a Vendor BSP. I guess they never
> forwarded it and so none of the open source guys is to blame. (Note I
> didn't check that, but I'd be surprised if I were wrong.)

I'm not blaming anyone. But the list I gave are those that would be
involved with the patch. Just asking why it wasn't included in mainline
is not a bad thing.

-- Steve


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Re: infinite spin in RT when booting with DHCP on

[Hector Palacios]

On 02/03/2012 06:39 PM, Steven Rostedt wrote:
> Note that you see that this causes a hang in the system if ksoftirqd is
> a real time task.

This is true.

> Not to mention, that ksoftirqd spins in an infinite
> loop if the cable isn't connected (regardless of ksoftirqd's priority).

This is not true. The infinite loop is only hit when ksoftirqd is a real time task. I 
think you got confused by the different patches we tried. That dirty hack of yours 
with the workqueue was the one hanging with the cable disconnected. ;o)

Regards
-- 
Héctor Palacios
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Re: infinite spin in RT when booting with DHCP on

[Steven Rostedt]

On Mon, 2012-02-06 at 09:51 +0100, Hector Palacios wrote:
> On 02/03/2012 06:39 PM, Steven Rostedt wrote:
> > Note that you see that this causes a hang in the system if ksoftirqd is
> > a real time task.
> 
> This is true.
> 
> > Not to mention, that ksoftirqd spins in an infinite
> > loop if the cable isn't connected (regardless of ksoftirqd's priority).
> 
> This is not true. The infinite loop is only hit when ksoftirqd is a real time task. I 
> think you got confused by the different patches we tried. That dirty hack of yours 
> with the workqueue was the one hanging with the cable disconnected. ;o)
> 

I didn't say it was going to hang the box, I said it was going to spin.

With the cable disconnected, did you run top to see if ksoftirqd was
running at near 100%?  It wont lock up the box because ksoftirqd is not
a real time task in mainline.

-- Steve

Re: infinite spin in RT when booting with DHCP on

[Tim Sander]

Hi 

Am Donnerstag, 2. Februar 2012, 22:34:26 schrieb Steven Rostedt:
> On Thu, 2012-02-02 at 21:13 +0100, Uwe Kleine-König wrote:
> > enabled the ksoftirq is also running wild with 3.0-rt. This also happens
> > when I fail to reproduce that on a pcm043 machine using 3.0.18-rt34. Can
> > you provide me your config. Does the problem occur on every boot for
> > you? If not, how often do I need to reboot?
> 
> Note, you also said (on IRC) that you boot off this card via NFS root.
> I'm not sure Tim has the same setup, and that may be a big difference in
> how this bug comes about.

As i said, it is not to easy to trigger. I needed to start connmand and 
dhclient in parallel and then do "ifconfig eth0 up/down" to trigger it 
sometimes. It is easier to trigger when the ubifs background task is running. 
But that apears normal "behaviour" for a race condition like this.
 
> It's a race issue, and it may require enabling the network interface
> after the system is up and running.
Yep, it's "hard" to hit this error on the first time. We have this error for 
more than a year now, and it only came to my attention after we had our qa 
test rack up and running.

Best regards
Tim

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Re: infinite spin in RT when booting with DHCP on

[Thomas Gleixner]

On Mon, 6 Feb 2012, Steven Rostedt wrote:

> On Mon, 2012-02-06 at 09:51 +0100, Hector Palacios wrote:
> > On 02/03/2012 06:39 PM, Steven Rostedt wrote:
> > > Note that you see that this causes a hang in the system if ksoftirqd is
> > > a real time task.
> > 
> > This is true.
> > 
> > > Not to mention, that ksoftirqd spins in an infinite
> > > loop if the cable isn't connected (regardless of ksoftirqd's priority).
> > 
> > This is not true. The infinite loop is only hit when ksoftirqd is a real time task. I 
> > think you got confused by the different patches we tried. That dirty hack of yours 
> > with the workqueue was the one hanging with the cable disconnected. ;o)
> > 
> 
> I didn't say it was going to hang the box, I said it was going to spin.
> 
> With the cable disconnected, did you run top to see if ksoftirqd was
> running at near 100%?  It wont lock up the box because ksoftirqd is not
> a real time task in mainline.

NETDEV_TX_BUSY has always been a source of trouble and we carry a
bunch of patches in RT which handle the obvious candidates since we
encountered the first spinning lockup on RT.

Mainline does not notice as it falls back to the SCHED_OTHER softirq
thread after trying to reschedule the same thing over and
over.

NETDEV_TX_BUSY simply should die. It's a bad design decision (invented
for mitigation of SMP lock contention problems) and it's abuse by
driver writers to bridge the gap of hardware bringup is just a
consequence of that decision.

        if (!fep->link) {
                /* Link is down or autonegotiation is in progress. */
                return NETDEV_TX_BUSY;
        }

So instead of handling link down and autonegotiation gracefully this
code relies on the fact that a 2 seconds spinning loop goes unnoticed
in mainline because ksoftirqd runs with SCHED_OTHER.

Oh well,

	tglx