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authorDaniel Vetter <daniel.vetter@ffwll.ch>2018-04-27 09:17:10 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2018-05-03 12:48:22 +0300
commit95ed01ea97b3d76380a817bc41ceeefffa6a99f1 (patch)
tree96ac4fcae66b5a543b3a0b578535400afae4d35e /drivers/dma-buf
parentaee1a37d0f1a904a1443c327211f4bcd645681f1 (diff)
downloadlinux-95ed01ea97b3d76380a817bc41ceeefffa6a99f1.tar.xz
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.c13
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);