This is a note to let you know that I've just added the patch titled
drm/nouveau/pmu: do not assume a PMU is present
to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-nouveau-pmu-do-not-assume-a-pmu-is-present.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 579b7c58215329803ce184704463de09f0f310ac Mon Sep 17 00:00:00 2001
From: Alexandre Courbot <acourbot@xxxxxxxxxx>
Date: Thu, 3 Sep 2015 17:39:52 +0900
Subject: drm/nouveau/pmu: do not assume a PMU is present
From: Alexandre Courbot <acourbot@xxxxxxxxxx>
commit 579b7c58215329803ce184704463de09f0f310ac upstream.
Some devices may not have a PMU. Avoid a NULL pointer dereference in
such cases by checking whether the pointer given to nvkm_pmu_pgob() is
valid.
Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c
@@ -28,7 +28,7 @@
void
nvkm_pmu_pgob(struct nvkm_pmu *pmu, bool enable)
{
- if (pmu->func->pgob)
+ if (pmu && pmu->func->pgob)
pmu->func->pgob(pmu, enable);
}
Patches currently in stable-queue which might be from acourbot@xxxxxxxxxx are
queue-4.3/drm-nouveau-pmu-do-not-assume-a-pmu-is-present.patch
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