On 05/29/2024, Alexander Stein wrote:
> Although very unlike to occur (media_blk_ctrl needs 'syscon' compatible
> removed), it lines up with the other error paths in probe function.
Why media_blk_ctrl needs 'syscon' compatible removed?
device_node_get_regmap may return error pointer other than
ERR_PTR(-EPROBE_DEFER), like ERR_PTR(-ENOMEM).
struct regmap *syscon_node_to_regmap(struct device_node *np)
{
if (!of_device_is_compatible(np, "syscon"))
return ERR_PTR(-EINVAL);
return device_node_get_regmap(np, true);
}
EXPORT_SYMBOL_GPL(syscon_node_to_regmap);
Regard,
Liu Ying
>
> Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
> Changes in v2:
> * Removed unused variable
> * Added missing \n at end of string
>
> drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c | 9 +++------
> 1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> index 2347f8dd632f9..13025f47f3902 100644
> --- a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> @@ -834,18 +834,15 @@ static int imx93_dsi_probe(struct platform_device *pdev)
> struct device *dev = &pdev->dev;
> struct device_node *np = dev->of_node;
> struct imx93_dsi *dsi;
> - int ret;
>
> dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> if (!dsi)
> return -ENOMEM;
>
> dsi->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,media-blk-ctrl");
> - if (IS_ERR(dsi->regmap)) {
> - ret = PTR_ERR(dsi->regmap);
> - dev_err(dev, "failed to get block ctrl regmap: %d\n", ret);
> - return ret;
> - }
> + if (IS_ERR(dsi->regmap))
> + return dev_err_probe(dev, PTR_ERR(dsi->regmap),
> + "failed to get block ctrl regmap\n");
>
> dsi->clk_pixel = devm_clk_get(dev, "pix");
> if (IS_ERR(dsi->clk_pixel))
