[PATCH v2 0/1] usb: phy: msm: fix a possible NULL dereference

[PATCH v2 0/1] usb: phy: msm: fix a possible NULL dereference

[LABBE Corentin]

Hello

Changes since v1
- Use of_device_get_match_data instead of of_match_device

LABBE Corentin (1):
  usb: phy: msm: fix a possible NULL dereference

 drivers/usb/phy/phy-msm-usb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

-- 
2.4.10

[PATCH v2 1/1] usb: phy: msm: fix a possible NULL dereference

[LABBE Corentin]

of_match_device could return NULL, and so cause a NULL pointer
dereference later.
Even if the probability of this case is very low, fixing it made
static analyzers happy.
Solving this with of_device_get_match_data made also code simplier.

Reported-by: coverity (CID 1324133)
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
---
 drivers/usb/phy/phy-msm-usb.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 80eb991..0d19a6d 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -1506,7 +1506,6 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 {
 	struct msm_otg_platform_data *pdata;
 	struct extcon_dev *ext_id, *ext_vbus;
-	const struct of_device_id *id;
 	struct device_node *node = pdev->dev.of_node;
 	struct property *prop;
 	int len, ret, words;
@@ -1518,8 +1517,9 @@ static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
 
 	motg->pdata = pdata;
 
-	id = of_match_device(msm_otg_dt_match, &pdev->dev);
-	pdata->phy_type = (enum msm_usb_phy_type) id->data;
+	pdata->phy_type = (enum msm_usb_phy_type)of_device_get_match_data(&pdev->dev);
+	if (!pdata->phy_type)
+		return 1;
 
 	motg->link_rst = devm_reset_control_get(&pdev->dev, "link");
 	if (IS_ERR(motg->link_rst))
-- 
2.4.10