[PATCH -next] soc: imx: gpc: add check for of_match_device in imx_gpc_old_dt_init
From: Tong Tiangen <hidden>
Date: 2021-06-01 09:53:40
Add check for of_match_device in imx_gpc_old_dt_init to avoid potential NULL dereference of of_id. Signed-off-by: Tong Tiangen <redacted> --- drivers/soc/imx/gpc.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/soc/imx/gpc.c b/drivers/soc/imx/gpc.c
index 90a8b2c0676f..017a5e2bd4e6 100644
--- a/drivers/soc/imx/gpc.c
+++ b/drivers/soc/imx/gpc.c@@ -403,14 +403,25 @@ static int imx_gpc_old_dt_init(struct device *dev, struct regmap *regmap, static int imx_gpc_probe(struct platform_device *pdev) { - const struct of_device_id *of_id = - of_match_device(imx_gpc_dt_ids, &pdev->dev); - const struct imx_gpc_dt_data *of_id_data = of_id->data; + const struct of_device_id *of_id; + const struct imx_gpc_dt_data *of_id_data; struct device_node *pgc_node; struct regmap *regmap; void __iomem *base; int ret; + of_id = of_match_device(imx_gpc_dt_ids, &pdev->dev); + if (!of_id) { + dev_err(&pdev->dev, "OF id missing\n"); + return -EINVAL; + } + + of_id_data = of_id->data; + if (!of_id_data) { + dev_err(&pdev->dev, "OF id data missing\n"); + return -EINVAL; + } + pgc_node = of_get_child_by_name(pdev->dev.of_node, "pgc"); /* bail out if DT too old and doesn't provide the necessary info */
--
2.18.0.huawei.25
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel