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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2017-07-28 22:29:51 +0100 |
|---|---|---|
| committer |   Gustavo Padovan <gustavo.padovan@collabora.com> | 2017-07-29 11:10:52 -0300 |
| commit | db1fc97ca0c0d3fdeeadf314d99a26188438940a (patch) | |
| tree | 94aaa4762b384f31af39ba08fa6453f54c297237 /include | |
| parent | tinydrm: repaper: add CONFIG_THERMAL dependency (diff) | |
| download | linux-dev-db1fc97ca0c0d3fdeeadf314d99a26188438940a.tar.xz linux-dev-db1fc97ca0c0d3fdeeadf314d99a26188438940a.zip | |
dma-buf/sync_file: Allow multiple sync_files to wrap a single dma-fence
Up until recently sync_file were create to export a single dma-fence to
userspace, and so we could canabalise a bit insie dma-fence to mark
whether or not we had enable polling for the sync_file itself. However,
with the advent of syncobj, we do allow userspace to create multiple
sync_files for a single dma-fence. (Similarly, that the sw-sync
validation framework also started returning multiple sync-files wrapping
a single dma-fence for a syncpt also triggering the problem.)
This patch reverts my suggestion in commit e24165537312
("dma-buf/sync_file: only enable fence signalling on poll()") to use a
single bit in the shared dma-fence and restores the sync_file->flags for
tracking the bits individually.
Reported-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Fixes: f1e8c67123cf ("dma-buf/sw-sync: Use an rbtree to sort fences in the timeline")
Fixes: e9083420bbac ("drm: introduce sync objects (v4)")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: dri-devel@lists.freedesktop.org
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.13-rc1+
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170728212951.7818-1-chris@chris-wilson.co.uk
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sync_file.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h index 5726107963b2..0ad87c434ae6 100644 --- a/include/linux/sync_file.h +++ b/include/linux/sync_file.h @@ -43,12 +43,13 @@ struct sync_file { #endif wait_queue_head_t wq; + unsigned long flags; struct dma_fence *fence; struct dma_fence_cb cb; }; -#define POLL_ENABLED DMA_FENCE_FLAG_USER_BITS +#define POLL_ENABLED 0 struct sync_file *sync_file_create(struct dma_fence *fence); struct dma_fence *sync_file_get_fence(int fd); |