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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-04-27 08:17:10 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2018-05-03 11:48:22 +0200 |
| commit | 95ed01ea97b3d76380a817bc41ceeefffa6a99f1 (patch) | |
| tree | 96ac4fcae66b5a543b3a0b578535400afae4d35e /drivers/dma-buf | |
| parent | aee1a37d0f1a904a1443c327211f4bcd645681f1 (diff) | |
| download | linux-95ed01ea97b3d76380a817bc41ceeefffa6a99f1.tar.gz linux-95ed01ea97b3d76380a817bc41ceeefffa6a99f1.tar.bz2 linux-95ed01ea97b3d76380a817bc41ceeefffa6a99f1.zip | |
dma-fence: Make ->enable_signaling optional
Many drivers have a trivial implementation for ->enable_signaling.
Let's make it optional by assuming that signalling is already
available when the callback isn't present.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180427061724.28497-4-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/dma-buf')
| -rw-r--r-- | drivers/dma-buf/dma-fence.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c index 4edb9fd3cf47..7b5b40d6b70e 100644 --- a/drivers/dma-buf/dma-fence.c +++ b/drivers/dma-buf/dma-fence.c @@ -181,6 +181,13 @@ void dma_fence_release(struct kref *kref) } EXPORT_SYMBOL(dma_fence_release); +/** + * dma_fence_free - default release function for &dma_fence. + * @fence: fence to release + * + * This is the default implementation for &dma_fence_ops.release. It calls + * kfree_rcu() on @fence. + */ void dma_fence_free(struct dma_fence *fence) { kfree_rcu(fence, rcu); @@ -560,7 +567,7 @@ dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, spinlock_t *lock, u64 context, unsigned seqno) { BUG_ON(!lock); - BUG_ON(!ops || !ops->wait || !ops->enable_signaling || + BUG_ON(!ops || !ops->wait || !ops->get_driver_name || !ops->get_timeline_name); kref_init(&fence->refcount); @@ -572,6 +579,10 @@ dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops, fence->flags = 0UL; fence->error = 0; + if (!ops->enable_signaling) + set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, + &fence->flags); + trace_dma_fence_init(fence); } EXPORT_SYMBOL(dma_fence_init); |