hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

drm/i915: Check for NULL atomic state in intel_crtc_disable_noatomic() 

In intel_crtc_disable_noatomic(), bail on a failure to allocate an
atomic state to avoid a NULL pointer dereference.

Fixes: 4a80655827 ("drm/i915: Pass atomic state to crtc enable/disable functions")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-4-git-send-email-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit 31bb2ef97e)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ander Conselvan de Oliveira 2017-01-20 16:28:45 +02:00 committed by Jani Nikula
parent 3781bd6e7d
commit 6d1d427a4e
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/i915/intel_display.c
View File

@ -6850,6 +6850,12 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
}
state = drm_atomic_state_alloc(crtc->dev);
if (!state) {
DRM_DEBUG_KMS("failed to disable [CRTC:%d:%s], out of memory",
crtc->base.id, crtc->name);
return;
}
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
/* Everything's already locked, -EDEADLK can't happen. */