[PATCH v3] media: platform: mtk-mdp3: Fix return value check in mdp_probe()

[AngeloGioacchino Del Regno]

Il 02/12/22 11:18, Qiheng Lin ha scritto:
> In case of error, the function mtk_mutex_get()
> returns ERR_PTR() and never returns NULL. The NULL test in the
> return value check should be replaced with IS_ERR().
> And also fix the err_free_mutex case.
> 
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Signed-off-by: Qiheng Lin <linqiheng at huawei.com>

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