On Fri, Jan 27, 2017 at 04:41:50PM +0530, Shailendra Verma wrote:
> of_match_device could return NULL, and so can cause a NULL
> pointer dereference later.
>
> Signed-off-by: Shailendra Verma <shailendra.v@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index ca22e5e..dbb99cf 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -1082,15 +1082,22 @@ static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
> static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> void *data)
> {
> - const struct of_device_id *of_id =
> - of_match_device(dw_mipi_dsi_dt_ids, dev);
> - const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
> + const struct of_device_id *of_id;
> + const struct dw_mipi_dsi_plat_data *pdata;
> struct platform_device *pdev = to_platform_device(dev);
> struct drm_device *drm = data;
> struct dw_mipi_dsi *dsi;
> struct resource *res;
> int ret;
>
> + of_id = of_match_device(dw_mipi_dsi_dt_ids, dev);
> + if (!of_id) {
> + dev_err(dev, "Error: No device match found\n");
> + return -ENODEV;
> + }
> +
> + pdata = of_id->data;
> +
> dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> if (!dsi)
> return -ENOMEM;
Hello
You could use of_device_get_match_data()
Regards
Corentin Labbe
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