commit 00ae1491f9 upstream.
Smatch detected potential error pointer dereference.
drivers/gpu/drm/drm_syncobj.c:888 drm_syncobj_transfer_to_timeline()
error: 'fence' dereferencing possible ERR_PTR()
The error pointer comes from dma_fence_allocate_private_stub(). One
caller expected error pointers and one expected NULL pointers. Change
it to return NULL and update the caller which expected error pointers,
drm_syncobj_assign_null_handle(), to check for NULL instead.
Fixes: f781f661e8 ("dma-buf: keep the signaling time of merged fences v3")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/b09f1996-3838-4fa2-9193-832b68262e43@moroto.mountain
Cc: Jindong Yue <jindong.yue@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
c3d576baa6