Re: [PATCH 1/2] tty: serial: msm_serial: Fix lockup for sysrq and oops

[Jeffrey Hugo]

On Sun, Nov 24, 2019 at 8:44 AM Leo Yan <leo.yan@xxxxxxxxxx> 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@xxxxxxxxxx>

Shouldn't this patch have a Fixes tag?

Was there a cover letter?