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90e9965524
linux/drivers/dma-buf
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Daniel Vetter 90e9965524 dma-fence: Allow wait_any_timeout for all fences 
When this was introduced in

commit a519435a96
Author: Christian König <christian.koenig@amd.com>
Date:   Tue Oct 20 16:34:16 2015 +0200

    dma-buf/fence: add fence_wait_any_timeout function v2

there was a restriction added that this only works if the dma-fence
uses the dma_fence_default_wait hook. Which works for amdgpu, which is
the only caller. Well, until you share some buffers with e.g. i915,
then you get an -EINVAL.

But there's really no reason for this, because all drivers must
support callbacks. The special ->wait hook is only as an optimization;
if the driver needs to create a worker thread for an active callback,
then it can avoid to do that if it knows that there's a process
context available already. So ->wait is just an optimization, just
using the logic in dma_fence_default_wait() should work for all
drivers.

Let's remove this restriction.

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
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180427061724.28497-5-daniel.vetter@ffwll.ch
2018-05-03 11:49:00 +02:00
..
dma-buf.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
dma-fence-array.c dma-buf/fence: Fix lock inversion within dma-fence-array 2017-11-21 22:37:05 +05:30
dma-fence.c dma-fence: Allow wait_any_timeout for all fences 2018-05-03 11:49:00 +02:00
Kconfig dma-buf: Rename struct fence to dma_fence 2016-10-25 14:40:39 +02:00
Makefile dma-buf: Rename struct fence to dma_fence 2016-10-25 14:40:39 +02:00
reservation.c drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
seqno-fence.c dma-buf: Rename struct fence to dma_fence 2016-10-25 14:40:39 +02:00
sw_sync.c dma-buf/sw_sync: Fix kerneldoc warnings 2018-02-19 10:50:49 +01:00
sync_debug.c Linux 4.13-rc2 2017-07-27 08:15:43 +10:00
sync_debug.h dma-buf/sw-sync: Use an rbtree to sort fences in the timeline 2017-06-29 18:54:07 -03:00
sync_file.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
sync_trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00