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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-03-30 11:40:46 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-04-20 12:57:54 +0200 |
| commit | 8e97d9ef362e65f2533366527cdafa1842dab201 (patch) | |
| tree | cbcc24e8193b0c71a5af524c1c5d1fbe1b69b5a1 /drivers/gpu/drm/exynos/exynos_drm_gem.c | |
| parent | 91263622f1184b7650cac10f70b08aa7f142f900 (diff) | |
| download | linux-8e97d9ef362e65f2533366527cdafa1842dab201.tar.bz2 | |
drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma
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@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-8-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.c | 4 |
1 files changed, 0 insertions, 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; } |