* [PATCH] usb: r8a66597-hdc disable interrupts fix
@ 2010-01-27 7:41 Magnus Damm
2010-01-29 3:08 ` Yoshihiro Shimoda
2010-02-02 2:32 ` Paul Mundt
0 siblings, 2 replies; 3+ messages in thread
From: Magnus Damm @ 2010-01-27 7:41 UTC (permalink / raw)
To: linux-sh
From: Magnus Damm <damm@opensource.se>
This patch improves disable_controller() in the r8a66597-hdc
driver to disable all interrupts and clear status flags. It
also makes sure that disable_controller() is called during
probe(). This fixes the relatively rare case of unexpected
pending interrupts after kexec reboot.
Signed-off-by: Magnus Damm <damm@opensource.se>
---
drivers/usb/host/r8a66597-hcd.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
--- 0001/drivers/usb/host/r8a66597-hcd.c
+++ work/drivers/usb/host/r8a66597-hcd.c 2010-01-26 18:12:57.000000000 +0900
@@ -216,8 +216,17 @@ static void disable_controller(struct r8
{
int port;
+ /* disable interrupts */
r8a66597_write(r8a66597, 0, INTENB0);
- r8a66597_write(r8a66597, 0, INTSTS0);
+ r8a66597_write(r8a66597, 0, INTENB1);
+ r8a66597_write(r8a66597, 0, BRDYENB);
+ r8a66597_write(r8a66597, 0, BEMPENB);
+ r8a66597_write(r8a66597, 0, NRDYENB);
+
+ /* clear status */
+ r8a66597_write(r8a66597, 0, BRDYSTS);
+ r8a66597_write(r8a66597, 0, NRDYSTS);
+ r8a66597_write(r8a66597, 0, BEMPSTS);
for (port = 0; port < r8a66597->max_root_hub; port++)
r8a66597_disable_port(r8a66597, port);
@@ -2466,6 +2475,12 @@ static int __devinit r8a66597_probe(stru
r8a66597->rh_timer.data = (unsigned long)r8a66597;
r8a66597->reg = (unsigned long)reg;
+ /* make sure no interrupts are pending */
+ ret = r8a66597_clock_enable(r8a66597);
+ if (ret < 0)
+ goto clean_up3;
+ disable_controller(r8a66597);
+
for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
init_timer(&r8a66597->td_timer[i]);
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] usb: r8a66597-hdc disable interrupts fix
2010-01-27 7:41 [PATCH] usb: r8a66597-hdc disable interrupts fix Magnus Damm
@ 2010-01-29 3:08 ` Yoshihiro Shimoda
2010-02-02 2:32 ` Paul Mundt
1 sibling, 0 replies; 3+ messages in thread
From: Yoshihiro Shimoda @ 2010-01-29 3:08 UTC (permalink / raw)
To: linux-sh
Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
>
> This patch improves disable_controller() in the r8a66597-hdc
> driver to disable all interrupts and clear status flags. It
> also makes sure that disable_controller() is called during
> probe(). This fixes the relatively rare case of unexpected
> pending interrupts after kexec reboot.
Thank you very much for your patch.
Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Thanks,
Yoshihiro Shimoda
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] usb: r8a66597-hdc disable interrupts fix
2010-01-27 7:41 [PATCH] usb: r8a66597-hdc disable interrupts fix Magnus Damm
2010-01-29 3:08 ` Yoshihiro Shimoda
@ 2010-02-02 2:32 ` Paul Mundt
1 sibling, 0 replies; 3+ messages in thread
From: Paul Mundt @ 2010-02-02 2:32 UTC (permalink / raw)
To: linux-sh
On Fri, Jan 29, 2010 at 12:08:13PM +0900, Yoshihiro Shimoda wrote:
> Magnus Damm wrote:
> > From: Magnus Damm <damm@opensource.se>
> >
> > This patch improves disable_controller() in the r8a66597-hdc
> > driver to disable all interrupts and clear status flags. It
> > also makes sure that disable_controller() is called during
> > probe(). This fixes the relatively rare case of unexpected
> > pending interrupts after kexec reboot.
>
> Thank you very much for your patch.
>
> Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
>
Queued for 2.6.33, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-02-02 2:32 ` Paul Mundt
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