[PATCH v3,2/2] media: mediatek: vcodec: adding lock to protect encoder context list

[AngeloGioacchino Del Regno]

Il 22/02/24 10:26, Yunfei Dong ha scritto:
> The ctx_list will be deleted when scp getting unexpected behavior, then the
> ctx_list->next will be NULL, the kernel driver maybe access NULL pointer in
> function vpu_enc_ipi_handler when going through each context, then reboot.
> 
> Need to add lock to protect the ctx_list to make sure the ctx_list->next isn't
> NULL pointer.
> 
> Fixes: 1972e32431ed ("media: mediatek: vcodec: Fix possible invalid memory access for encoder")
> Signed-off-by: Yunfei Dong <yunfei.dong at mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>