linux

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Chris Wilson 9c98f021e4 dma-fence: Serialise signal enabling (dma_fence_enable_sw_signaling)

Make dma_fence_enable_sw_signaling() behave like its
dma_fence_add_callback() and dma_fence_default_wait() counterparts and
perform the test to enable signaling under the fence->lock, along with
the action to do so. This ensure that should an implementation be trying
to flush the cb_list (by signaling) on retirement before freeing the
fence, it can do so in a race-free manner.

See also 0fc89b6802ba ("dma-fence: Simply wrap dma_fence_signal_locked
with dma_fence_signal").

v2: Refactor all 3 enable_signaling paths to use a common function.
v3: Don't argue, just keep the tracepoint in the existing spot.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004101140.32713-1-chris@chris-wilson.co.uk

2019-10-04 11:43:45 +01:00

dma-buf.c

dma-buf: Restore seqlock around dma_resv updates

2019-08-16 12:40:58 +01:00

dma-fence-array.c

dma-fence: Propagate errors to dma-fence-array container

2019-08-12 08:25:52 +01:00

dma-fence-chain.c

dma-buf: fix stack corruption in dma_fence_chain_release

2019-08-05 17:32:33 +02:00

dma-fence.c

dma-fence: Serialise signal enabling (dma_fence_enable_sw_signaling)