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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2023-02-28 18:26:12 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-02-28 18:41:32 +0300 |
| commit | e0106ac97886b6bc36c480de72562d3e70b3f8b1 (patch) | |
| tree | 0dd0cdd216af7dbb5d38203b8f6776a5ada13163 /drivers/gpu/drm/lima | |
| parent | f9b9297b1facb636ee81f03be3658087067babc2 (diff) | |
| download | linux-e0106ac97886b6bc36c480de72562d3e70b3f8b1.tar.xz | |
Revert "drm/shmem-helper: Switch to reservation lock"
This reverts commit 67b7836d4458790f1261e31fe0ce3250989784f0.
The locking appears incomplete. A caller of SHMEM helper's pin
function never acquires the dma-buf reservation lock. So we get
WARNING: CPU: 3 PID: 967 at drivers/gpu/drm/drm_gem_shmem_helper.c:243 drm_gem_shmem_pin+0x42/0x90 [drm_shmem_helper]
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230228152612.19971-1-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/lima')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_gem.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c index 5008f0c2428f..0f1ca0b0db49 100644 --- a/drivers/gpu/drm/lima/lima_gem.c +++ b/drivers/gpu/drm/lima/lima_gem.c @@ -34,7 +34,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) new_size = min(new_size, bo->base.base.size); - dma_resv_lock(bo->base.base.resv, NULL); + mutex_lock(&bo->base.pages_lock); if (bo->base.pages) { pages = bo->base.pages; @@ -42,7 +42,7 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT, sizeof(*pages), GFP_KERNEL | __GFP_ZERO); if (!pages) { - dma_resv_unlock(bo->base.base.resv); + mutex_unlock(&bo->base.pages_lock); return -ENOMEM; } @@ -56,13 +56,13 @@ int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm) struct page *page = shmem_read_mapping_page(mapping, i); if (IS_ERR(page)) { - dma_resv_unlock(bo->base.base.resv); + mutex_unlock(&bo->base.pages_lock); return PTR_ERR(page); } pages[i] = page; } - dma_resv_unlock(bo->base.base.resv); + mutex_unlock(&bo->base.pages_lock); ret = sg_alloc_table_from_pages(&sgt, pages, i, 0, new_size, GFP_KERNEL); |