Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / ltc / base.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c
index 85b1464..587c52f 100644 (file)
--- a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c
+++ b/kernel/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