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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-05 17:18:44 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-05 17:18:44 -0700 |
| commit | 1062ae4982cabbf60f89b4e069fbb7def7edc8f7 (patch) | |
| tree | 01f6944b55d5b69615234f8c1f52b4e721f3d8e6 /drivers/gpu/drm/tegra/gem.c | |
| parent | Merge tag 'gfs2-4.12.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 (diff) | |
| parent | Merge tag 'drm/tegra/for-4.12-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next (diff) | |
| download | linux-dev-1062ae4982cabbf60f89b4e069fbb7def7edc8f7.tar.xz linux-dev-1062ae4982cabbf60f89b4e069fbb7def7edc8f7.zip | |
Merge tag 'drm-forgot-about-tegra-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux
Pull drm tegra updates from Dave Airlie:
"I missed a pull request from Thierry, this stuff has been in
linux-next for a while anyways.
It does contain a branch from the iommu tree, but Thierry said it
should be fine"
* tag 'drm-forgot-about-tegra-for-v4.12-rc1' of git://people.freedesktop.org/~airlied/linux:
gpu: host1x: Fix host1x driver shutdown
gpu: host1x: Support module reset
gpu: host1x: Sort includes alphabetically
drm/tegra: Add VIC support
dt-bindings: Add bindings for the Tegra VIC
drm/tegra: Add falcon helper library
drm/tegra: Add Tegra DRM allocation API
drm/tegra: Add tiling FB modifiers
drm/tegra: Don't leak kernel pointer to userspace
drm/tegra: Protect IOMMU operations by mutex
drm/tegra: Enable IOVA API when IOMMU support is enabled
gpu: host1x: Add IOMMU support
gpu: host1x: Fix potential out-of-bounds access
iommu/iova: Fix compile error with CONFIG_IOMMU_IOVA=m
iommu: Add dummy implementations for !IOMMU_IOVA
MAINTAINERS: Add related headers to IOMMU section
iommu/iova: Consolidate code for adding new node to iovad domain rbtree
Diffstat (limited to 'drivers/gpu/drm/tegra/gem.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/gem.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c index 8672f5d2f237..424569b53e57 100644 --- a/drivers/gpu/drm/tegra/gem.c +++ b/drivers/gpu/drm/tegra/gem.c @@ -128,12 +128,14 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo) if (!bo->mm) return -ENOMEM; + mutex_lock(&tegra->mm_lock); + err = drm_mm_insert_node_generic(&tegra->mm, bo->mm, bo->gem.size, PAGE_SIZE, 0, 0); if (err < 0) { dev_err(tegra->drm->dev, "out of I/O virtual memory: %zd\n", err); - goto free; + goto unlock; } bo->paddr = bo->mm->start; @@ -147,11 +149,14 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo) bo->size = err; + mutex_unlock(&tegra->mm_lock); + return 0; remove: drm_mm_remove_node(bo->mm); -free: +unlock: + mutex_unlock(&tegra->mm_lock); kfree(bo->mm); return err; } @@ -161,8 +166,11 @@ static int tegra_bo_iommu_unmap(struct tegra_drm *tegra, struct tegra_bo *bo) if (!bo->mm) return 0; + mutex_lock(&tegra->mm_lock); iommu_unmap(tegra->domain, bo->paddr, bo->size); drm_mm_remove_node(bo->mm); + mutex_unlock(&tegra->mm_lock); + kfree(bo->mm); return 0; |