drm/sti: check dma_set_coherent_mask return value

Return value for DMA allocation was not checked.  Check it and return
error code in case of failing.

Signed-off-by: Raphael Gallais-Pou <rgallaispou@gmail.com>
Acked-by: Alain Volmat <alain.volmat@foss.st.com>
Link: https://patch.msgid.link/20250717-sti-rework-v1-1-46d516fb1ebb@gmail.com
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
This commit is contained in:
Raphael Gallais-Pou 2025-07-17 21:15:32 +02:00 • committed by Raphael Gallais-Pou
commit 76f396696e