From: Harini Katakam <harinik@xilinx.com>
To: Claudiu Beznea <Claudiu.Beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>,
Nicolas Ferre <Nicolas.Ferre@microchip.com>,
David Miller <davem@davemloft.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Michal Simek <michal.simek@xilinx.com>,
appanad@xilinx.com
Subject: Re: [PATCH v2 4/4] net: macb: Add support for suspend/resume with full power down
Date: Tue, 27 Nov 2018 11:55:47 +0530 [thread overview]
Message-ID: <CAFcVEC+yyvQckJaj9HrkUtsJSsAKs0F5akRkgBceMqbOAcdx3g@mail.gmail.com> (raw)
In-Reply-To: <c844298e-d997-940f-be85-fd3442d01be5@microchip.com>
Hi Claudiu,
On Mon, Nov 26, 2018 at 8:16 PM <Claudiu.Beznea@microchip.com> wrote:
>
>
>
> On 26.11.2018 09:07, Harini Katakam wrote:
<snip>
>
> In the previous version you said you encountered some crashes while
> stressing this part if macb_open()/macb_close() was used in here. Could you
> share the tests so that I can debug it on my side?
Sure, my tests include doing a series of suspend/resume -- it is done
as part of a
random regression script. On ZynqMP, it includes the following to do an
FPD off suspend and then use either UART or WOL as a wake source and
repeat the same, sometimes pinging in between:
echo pm_request_wakeup 8 1 0 1 > /sys/kernel/debug/zynqmp-firmware/pm
echo pm_force_powerdown 6 > /sys/kernel/debug/zynqmp-firmware/pm
echo enabled > /sys/devices/platform/amba/ff000000.serial/tty/ttyPS0/power/wakeup
echo enabled > /sys/devices/platform/amba/ff0e0000.ethernet/net/eth0/power/wakeup
echo mem > /sys/power/state
ping does not work sometimes and after a few iterations (sometimes
20), a crash can be
observed tracing from "kfree_skb_list" to "macb_free_consistent". From
the flow, the
only explanation I could come up with was that there was an attempt to
free buffers that
may not have been allocated. Also, this was time consuming in the
suspend/resume path.
<snip>
> > + } else {
> > + macb_writel(bp, NCR, MACB_BIT(MPE));
>
> Just asking... shouldn't other registers be restored here after SoC power
> is cut off?
Ideally yes. But in this series, I'm just attempting to re-initialize
to a working
state. I can try context save/restore later.
Regards,
Harini
next prev parent reply other threads:[~2018-11-27 6:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-26 7:07 [PATCH v2 0/4] Macb power management support for ZynqMP Harini Katakam
2018-11-26 7:07 ` [PATCH v2 1/4] net: macb: Check MDIO state before read/write and use timeouts Harini Katakam
2018-11-26 14:39 ` Andrew Lunn
2018-11-27 5:38 ` Harini Katakam
2018-11-26 14:46 ` Claudiu.Beznea
2018-11-26 14:52 ` Andrew Lunn
2018-11-27 5:36 ` Harini Katakam
2018-11-27 10:25 ` Claudiu.Beznea
2018-11-27 10:49 ` Harini Katakam
2018-11-28 0:35 ` Andrew Lunn
2018-11-29 10:21 ` Claudiu.Beznea
2018-11-26 7:07 ` [PATCH v2 2/4] net: macb: Support clock management for tsu_clk Harini Katakam
2018-11-26 7:07 ` [PATCH v2 3/4] net: macb: Add pm runtime support Harini Katakam
2018-11-26 14:47 ` Andrew Lunn
2018-11-26 14:47 ` Claudiu.Beznea
2018-11-26 7:07 ` [PATCH v2 4/4] net: macb: Add support for suspend/resume with full power down Harini Katakam
2018-11-26 14:46 ` Claudiu.Beznea
2018-11-27 6:25 ` Harini Katakam [this message]
2018-11-27 10:31 ` Claudiu.Beznea
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