[PATCH] omapfb: panel-sharp-ls037v7dw01: fix check of gpio_to_desc() return value

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



The change fixes a check of gpio_to_desc() return value, the function
returns either a valid pointer to struct gpio_desc or NULL, this makes
IS_ERR() check invalid and may lead to a NULL pointer dereference in
runtime.

Signed-off-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
---
 .../fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c    | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c
index abfd1f6..1954ec9 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-sharp-ls037v7dw01.c
@@ -200,20 +200,16 @@ static struct omap_dss_driver sharp_ls_ops = {
 static int sharp_ls_get_gpio(struct device *dev, int gpio, unsigned long flags,
 		  char *desc, struct gpio_desc **gpiod)
 {
-	struct gpio_desc *gd;
 	int r;
 
-	*gpiod = NULL;
-
 	r = devm_gpio_request_one(dev, gpio, flags, desc);
-	if (r)
+	if (r) {
+		*gpiod = NULL;
 		return r == -ENOENT ? 0 : r;
+	}
 
-	gd = gpio_to_desc(gpio);
-	if (IS_ERR(gd))
-		return PTR_ERR(gd) == -ENOENT ? 0 : PTR_ERR(gd);
+	*gpiod = gpio_to_desc(gpio);
 
-	*gpiod = gd;
 	return 0;
 }
 
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Arm (vger)]     [ARM Kernel]     [ARM MSM]     [Linux Tegra]     [Linux WPAN Networking]     [Linux Wireless Networking]     [Maemo Users]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Trails]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux