Hi Zhang,
Thank you for the patch.
On Tue, Aug 29, 2023 at 12:55:01AM +0800, Zhang Shurong wrote:
> of_match_device() may fail and returns a NULL pointer.
How can it return a NULL pointer here ?
> Fix this by checking the return value of of_match_device().
>
> Fixes: 3818715f62b4 ("drm/bridge: imx: Add LDB support for i.MX8qxp")
> Signed-off-by: Zhang Shurong <zhang_shur...@foxmail.com>
> ---
> drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c
> b/drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c
> index 7984da9c0a35..d272f35c8eac 100644
> --- a/drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c
> +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c
> @@ -488,6 +488,8 @@ static int imx8qxp_ldb_parse_dt_companion(struct
> imx8qxp_ldb *imx8qxp_ldb)
> * string.
> */
> match = of_match_device(dev->driver->of_match_table, dev);
> + if (!match)
> + return -ENODEV;
> if (!of_device_is_compatible(companion, match->compatible)) {
> DRM_DEV_ERROR(dev, "companion LDB is incompatible\n");
> ret = -ENXIO;
--
Regards,
Laurent Pinchart
