linux/drivers/dma-buf
Gustavo Padovan a02b9dc90d dma-buf/sync_file: refactor fence storage in struct sync_file
Create sync_file->fence to abstract the type of fence we are using for
each sync_file. If only one fence is present we use a normal struct fence
but if there is more fences to be added to the sync_file a fence_array
is created.

This change cleans up sync_file a bit. We don't need to have sync_file_cb
array anymore. Instead, as we always have  one fence, only one fence
callback is registered per sync_file.

v2: Comments from Chris Wilson and Christian König
	- Not using fence_ops anymore
	- fence_is_array() was created to differentiate fence from fence_array
	- fence_array_teardown() is now exported and used under fence_is_array()
	- struct sync_file lost num_fences member

v3: Comments from Chris Wilson and Christian König
	- struct sync_file lost status member in favor of fence_is_signaled()
	- drop use of fence_array_teardown()
	- use sizeof(*fence) to allocate only an array on fence pointers

v4: Comments from Chris Wilson
	- use sizeof(*fence) to reallocate array
	- fix typo in comments
	- protect num_fences sum against overflows
	- use array->base instead of casting the to struct fence

v5: fixes checkpatch warnings

v6: fix case where all fences are signaled.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
2016-08-11 15:33:24 +05:30
..
dma-buf.c dma-buf: Release module reference on creation failure 2016-07-18 14:10:49 +02:00
fence-array.c dma-buf/fence-array: add fence_is_array() 2016-08-11 15:33:23 +05:30
fence.c dma-buf/fence: make fence context 64 bit v2 2016-06-02 08:27:41 +02:00
Kconfig dma-buf/sync_file: improve Kconfig description for Sync Files 2016-07-13 19:52:08 +05:30
Makefile dma-buf/fence: add fence_array fences v6 2016-06-02 09:26:15 +02:00
reservation.c reservation: add headerdoc comments 2016-05-31 22:12:43 +05:30
seqno-fence.c dma-buf: Minor coding style fixes 2015-05-21 11:29:59 +05:30
sync_file.c dma-buf/sync_file: refactor fence storage in struct sync_file 2016-08-11 15:33:24 +05:30