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authorBen Skeggs <bskeggs@redhat.com>2016-12-13 09:29:55 +1000
committerBen Skeggs <bskeggs@redhat.com>2016-12-13 11:40:09 +1000
commitf4e65efc88b64c1dbca275d42a188edccedb56c6 (patch)
tree358ba57ac8f56d8075e1c7feca22121dac7e594c /drivers
parent64373e4bb6e13f571145d32202907cdffe861550 (diff)
downloadlinux-f4e65efc88b64c1dbca275d42a188edccedb56c6.tar.bz2
drm/nouveau/ltc: protect clearing of comptags with mutex
Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c
index 39c2a38e54f7..0c7ef250dcaf 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c
@@ -47,8 +47,10 @@ nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count)
BUG_ON((first > limit) || (limit >= ltc->num_tags));
+ mutex_lock(&ltc->subdev.mutex);
ltc->func->cbc_clear(ltc, first, limit);
ltc->func->cbc_wait(ltc);
+ mutex_unlock(&ltc->subdev.mutex);
}
int