X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fnouveau%2Fnvkm%2Fsubdev%2Fltc%2Fbase.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fnouveau%2Fnvkm%2Fsubdev%2Fltc%2Fbase.c;h=587c52f08d3f5803b60ca23cd3f2972d611ffed9;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=85b1464c01942013f22055be345d751636bc68cb;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

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 85b1464c0..587c52f08 100644
--- 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