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@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 91d87e7c2a2f..a3286a1ec2b1 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -378,16 +378,12 @@ 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; }