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f5b07b04e5
linux/drivers/dma-buf
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Chris Wilson f5b07b04e5 dma-buf: Discard old fence_excl on retrying get_fences_rcu for realloc 
If we have to drop the seqcount & rcu lock to perform a krealloc, we
have to restart the loop. In doing so, be careful not to lose track of
the already acquired exclusive fence.

Fixes: fedf54132d ("dma-buf: Restart reservation_object_get_fences_rcu() after writes")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: stable@vger.kernel.org #v4.10
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190604125323.21396-1-chris@chris-wilson.co.uk
2019-06-05 07:38:37 +01:00
..
dma-buf.c dma-buf: start caching of sg_table objects v2 2019-05-22 15:34:55 +02:00
dma-fence-array.c dma-fence: Make ->wait callback optional 2018-07-03 13:12:57 +02:00
dma-fence-chain.c dma-buf: explicitely note that dma-fence-chains use 64bit seqno 2019-04-16 14:49:10 +02:00
dma-fence.c drm/i915: Seal races between async GPU cancellation, retirement and signaling 2019-05-13 13:53:35 +03:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
reservation.c dma-buf: Discard old fence_excl on retrying get_fences_rcu for realloc 2019-06-05 07:38:37 +01:00
seqno-fence.c dma-buf: Rename struct fence to dma_fence 2016-10-25 14:40:39 +02:00
sw_sync.c dma-buf: explicitely note that dma-fence-chains use 64bit seqno 2019-04-16 14:49:10 +02:00
sync_debug.c dma-buf: Remove unused sync_dump() 2019-04-23 09:30:07 +01:00
sync_debug.h dma-buf: Remove unused sync_dump() 2019-04-23 09:30:07 +01:00
sync_file.c dma-buf: explicitely note that dma-fence-chains use 64bit seqno 2019-04-16 14:49:10 +02:00
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
udmabuf.c drivers/dma-buf/udmabuf.c: convert to use vm_fault_t 2019-01-04 13:13:46 -08:00