The sg table isn't refcounted, there's no corresponding locking for
unmapping and drm_map_sg is ok with being called concurrently.
So drop the locking since it doesn't protect anything.
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_gem.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index f6c7bc3a7e68..cf34c7f9ed93 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -367,16 +367,12 @@ int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
{
int nents;
- mutex_lock(&drm_dev->struct_mutex);
-
nents = dma_map_sg(drm_dev->dev, sgt->sgl, sgt->nents, dir);
if (!nents) {
DRM_ERROR("failed to map sgl with dma.\n");
- mutex_unlock(&drm_dev->struct_mutex);
return nents;
}
- mutex_unlock(&drm_dev->struct_mutex);
return 0;
}
--
2.5.1
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