[lkml]   [2018]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 4/4] net: macb: Add support for suspend/resume with full power down
On Wed, Oct 31, 2018 at 09:10:23AM +0530, Harini Katakam wrote:
> When macb device is suspended and system is powered down, the clocks
> are removed and hence macb should be closed gracefully and restored
> upon resume. This patch does the same by switching off the net device,
> suspending phy and performing necessary cleanup of interrupts and BDs.
> Upon resume, all these are reinitialized again.
> Reset of macb device is done only when GEM is not a wake device.
> Even when gem is a wake device, tx queues can be stopped and ptp device
> can be closed (tsu clock will be disabled in pm_runtime_suspend) as
> wake event detection has no dependency on this.
> Signed-off-by: Kedareswara rao Appana <>
> Signed-off-by: Harini Katakam <>
> ---
> Notes:
> I was unable to do a full macb_close/open in this patch as suggested
> because it was freeing and allocating the full RX/TX buffers and
> this time consuming, also leading to a crash when done continuously
> in stress tests.

Hi Harini

Did you try stress testing just plain up/down, which will call
macb_open/macb_close? It could be it is broken already, and
suspend/resume just makes it more obvious it is broken.


 \ /
  Last update: 2018-10-31 15:59    [W:0.082 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site