[PATCH] drm/nouveau/gr/gf100: Fix missing unlock in gf100_gr_chan_new()

[Li Huafei]

When the call to gf100_grctx_generate() fails, unlock gr->fecs.mutex
before returning the error.

Fixes smatch warning:

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c:480 gf100_gr_chan_new() warn: 
inconsistent returns '&gr->fecs.mutex'.

Fixes: ca081fff6ecc ("drm/nouveau/gr/gf100-: generate golden context during 
first object alloc")
Signed-off-by: Li Huafei <lihuaf...@huawei.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c 
b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
index 060c74a80eb1..3ea447f6a45b 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c
@@ -443,6 +443,7 @@ gf100_gr_chan_new(struct nvkm_gr *base, struct nvkm_chan 
*fifoch,
                ret = gf100_grctx_generate(gr, chan, fifoch->inst);
                if (ret) {
                        nvkm_error(&base->engine.subdev, "failed to construct 
context\n");
+                       mutex_unlock(&gr->fecs.mutex);
                        return ret;
                }
        }
-- 
2.25.1