lkml.org 
[lkml]   [2019]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH 1/2] tty: serial: msm_serial: Fix lockup for sysrq and oops
On Sun, Nov 24, 2019 at 8:44 AM Leo Yan <leo.yan@linaro.org> wrote:
>
> As the commit 677fe555cbfb ("serial: imx: Fix recursive locking bug")
> has mentioned the uart driver might cause recursive locking between
> normal printing and the kernel debugging facilities (e.g. sysrq and
> oops). In the commit it gave out suggestion for fixing recursive
> locking issue: "The solution is to avoid locking in the sysrq case
> and trylock in the oops_in_progress case."
>
> This patch follows the suggestion (also used the exactly same code with
> other serial drivers, e.g. amba-pl011.c) to fix the recursive locking
> issue, this can avoid stuck caused by deadlock and print out log for
> sysrq and oops.
>
> Signed-off-by: Leo Yan <leo.yan@linaro.org>

Shouldn't this patch have a Fixes tag?

Was there a cover letter?

\
 
 \ /
  Last update: 2019-11-25 00:01    [W:0.040 / U:1.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site