diff options
| author | Christian König <christian.koenig@amd.com> | 2016-06-01 15:10:02 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-06-02 08:27:41 +0200 |
| commit | 76bf0db5543976ef50362db7071da367cb118532 (patch) | |
| tree | c8f94084239df5d095c80d87d423d44d95081379 /drivers/staging/android | |
| parent | 3377900791ea48a638fb9b70869258332951271d (diff) | |
dma-buf/fence: make fence context 64 bit v2
Fence contexts are created on the fly (for example) by the GPU scheduler used
in the amdgpu driver as a result of an userspace request. Because of this
userspace could in theory force a wrap around of the 32bit context number
if it doesn't behave well.
Avoid this by increasing the context number to 64bits. This way even when
userspace manages to allocate a billion contexts per second it takes more
than 500 years for the context number to wrap around.
v2: fix printf formats as well.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1464786612-5010-2-git-send-email-deathsimple@vodafone.de
Diffstat (limited to 'drivers/staging/android')
| -rw-r--r-- | drivers/staging/android/sync.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h index b56885c14839..ebb34dca60df 100644 --- a/drivers/staging/android/sync.h +++ b/drivers/staging/android/sync.h @@ -68,7 +68,8 @@ struct sync_timeline { /* protected by child_list_lock */ bool destroyed; - int context, value; + u64 context; + int value; struct list_head child_list_head; spinlock_t child_list_lock; |