[PATCH 07/13] drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma
Daniel Vetter
daniel.vetter at ffwll.ch
Wed Mar 30 09:40:46 UTC 2016
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.
Cc: Inki Dae <inki.dae at samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
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 3b7209335df0..60b9975bb0b1 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -388,16 +388,12 @@ int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
{
int nents;
- mutex_lock(&drm_dev->struct_mutex);
-
nents = dma_map_sg(to_dma_dev(drm_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;
}
--
2.8.0.rc3
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