From: Alex Deucher <alexdeucher@gmail.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: "Mikita Lipski" <mlipski@amd.com>,
"Harry Wentland" <harry.wentland@amd.com>,
"Leo Li" <sunpeng.li@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"David (ChunMing) Zhou" <David1.Zhou@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Mikita Lipski" <mikita.lipski@amd.com>,
"Lyude Paul" <lyude@redhat.com>,
"Nicholas Kazlauskas" <nicholas.kazlauskas@amd.com>,
"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
"amd-gfx list" <amd-gfx@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/amd/display: Fix unsigned variable compared to less than zero
Date: Mon, 11 Nov 2019 17:39:34 -0500 [thread overview]
Message-ID: <CADnq5_NmfCaQ=6to+ng81=qV0mp7Vo-ugKPTF__5JMAmjP13Kw@mail.gmail.com> (raw)
In-Reply-To: <cf7d4cfe-be29-39d8-8a5e-bac217475597@embeddedor.com>
Applied. Thanks!
Alex
On Mon, Nov 11, 2019 at 2:44 PM Gustavo A. R. Silva
<gustavo@embeddedor.com> wrote:
>
>
>
> On 11/11/19 11:46, Mikita Lipski wrote:
> >
> > Thanks for catching it!
> >
>
> Glad to help out. :)
>
> > Reviewed-by: Mikita Lipski <mikita.lipski@amd.com>
> >
>
> Thanks
> --
> Gustavo
>
> >
> > On 11.11.2019 12:25, Gustavo A. R. Silva wrote:
> >> Currenly, the error check below on variable*vcpi_slots* is always
> >> false because it is a uint64_t type variable, hence, the values
> >> this variable can hold are never less than zero:
> >>
> >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:
> >> 4870 if (dm_new_connector_state->vcpi_slots < 0) {
> >> 4871 DRM_DEBUG_ATOMIC("failed finding vcpi slots: %d\n", (int)dm_new_connector_stat e->vcpi_slots);
> >> 4872 return dm_new_connector_state->vcpi_slots;
> >> 4873 }
> >>
> >> Fix this by making*vcpi_slots* of int type
> >>
> >> Addresses-Coverity: 1487838 ("Unsigned compared against 0")
> >> Fixes: b4c578f08378 ("drm/amd/display: Add MST atomic routines")
> >> Signed-off-by: Gustavo A. R. Silva<gustavo@embeddedor.com>
> >> ---
> >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> >> index 6db07e9e33ab..a8fc90a927d6 100644
> >> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> >> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> >> @@ -403,7 +403,7 @@ struct dm_connector_state {
> >> bool underscan_enable;
> >> bool freesync_capable;
> >> uint8_t abm_level;
> >> - uint64_t vcpi_slots;
> >> + int vcpi_slots;
> >> uint64_t pbn;
> >> };
> >> -- 2.23.0
> >
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
prev parent reply other threads:[~2019-11-11 22:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-11 17:25 [PATCH] drm/amd/display: Fix unsigned variable compared to less than zero Gustavo A. R. Silva
2019-11-11 17:46 ` Mikita Lipski
2019-11-11 19:27 ` Gustavo A. R. Silva
2019-11-11 22:39 ` Alex Deucher [this message]
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