drm: writeback: Fix leak of writeback job
[ Upstream commit e482ae9b ] Writeback jobs are allocated when the WRITEBACK_FB_ID is set, and deleted when the jobs complete. This results in both a memory leak of the job and a leak of the framebuffer if the atomic commit returns before the job is queued for processing, for instance if the atomic check fails or if the commit runs in test-only mode. Fix this by implementing the drm_writeback_cleanup_job() function and calling it from __drm_atomic_helper_connector_destroy_state(). As writeback jobs are removed from the state when they're queued for processing, any job left in the state when the state gets destroyed needs to be cleaned up. The existing declaration of the drm_writeback_cleanup_job() function without an implementation hints that this problem was considered, but never addressed. Signed-off-by:Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by:
Brian Starkey <brian.starkey@arm.com> Acked-by:
Liviu Dudau <liviu.dudau@arm.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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