lkml.org 
[lkml]   [2021]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/2] ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure
On Wed, 21 Apr 2021 18:20:56 +0100,
Sudeep Holla <sudeep.holla@arm.com> wrote:
>
> (with stable email fixed, but may need separate posting anyways)
>
> On Wed, Apr 21, 2021 at 05:43:16PM +0100, Marc Zyngier wrote:
> > When failing the driver probe because of invalid firmware properties,
> > the GTDT driver unmaps the interrupt that it mapped earlier.
> >
> > However, it never checks whether the mapping of the interrupt actially
> > succeeded. Even more, should the firmware report an illegal interrupt
> > number that overlaps with the GIC SGI range, this can result in an
> > IPI being unmapped, and subsequent fireworks (as reported by Dann
> > Frazier).
> >
> > Rework the driver to have a slightly saner behaviour and actually
> > check whether the interrupt has been mapped before unmapping things.
> >
> > Reported-by: dann frazier <dann.frazier@canonical.com>
> > Fixes: ca9ae5ec4ef0 ("acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver")
> > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > Link: https://lore.kernel.org/r/YH87dtTfwYgavusz@xps13.dannf
> > Cc: stable@vgerlkernel.org
> ^^^
>
> I thought I messed up while replying with my fat fingers, but here is the
> culprit. I got mail delivery failure to my reply, thought I will let you
> know as it may be difficult to notice this when using git send-email.

I'm definitely the one with very fat fingers. I'll fix the patch in my
tree.

Thanks for the heads up,

M.

--
Without deviation from the norm, progress is not possible.

\
 
 \ /
  Last update: 2021-04-21 19:59    [W:0.050 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site