On Mon, Apr 29, 2019 at 03:08:23PM -0700, Chia-I Wu wrote: > This is motivated by having meaningful ftrace events, but it also > fixes use cases where dma_fence_is_later is called, such as in > sync_file_merge. > > In other drivers, fence creation and cmdbuf submission normally > happen atomically, > > mutex_lock(); > fence = dma_fence_create(..., ++timeline->seqno); > submit_cmdbuf(); > mutex_unlock(); > > and have no such issue. But in our driver, because most ioctls > queue commands into ctrlq, we do not want to grab a lock. Instead, > we set seqno to 0 when a fence is created, and update it when the > command is finally queued and the seqno is known. Series pushed to drm-misc-next. thanks, Gerd _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
