dma-buf: Add dma_fence_array_for_each (v2)

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Add a helper to iterate over all fences in a dma_fence_array object.

v2 (Jason Ekstrand)
 - Return NULL from dma_fence_array_first if head == NULL.  This matches
   the iterator behavior of dma_fence_chain_for_each in that it iterates
   zero times if head == NULL.
 - Return NULL from dma_fence_array_next if index > array->num_fences.

Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210610210925.642582-2-jason@jlekstrand.net
Signed-off-by: Christian König <christian.koenig@amd.com>

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Christian König 2022-01-24 14:03:24 +01:00 • committed by Christian König

parent 7344bad7fb

commit caaf2ae712

2 changed files with 44 additions and 0 deletions

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27

drivers/dma-buf/dma-fence-array.c

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17

include/linux/dma-fence-array.h

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