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authorGeert Uytterhoeven <geert+renesas@glider.be>2019-03-28 14:13:47 +0100
committerLinus Walleij <linus.walleij@linaro.org>2019-03-28 17:58:34 +0100
commitf7299d441a4da8a5088e651ea55023525a793a13 (patch)
tree707a89a002434ede152561da9bb2a3344afce331 /drivers
parent7ce40277bf848391705011ba37eac2e377cbd9e6 (diff)
downloadlinux-f7299d441a4da8a5088e651ea55023525a793a13.tar.bz2
gpio: of: Fix of_gpiochip_add() error path
If the call to of_gpiochip_scan_gpios() in of_gpiochip_add() fails, no error handling is performed. This lead to the need of callers to call of_gpiochip_remove() on failure, which causes "BAD of_node_put() on ..." if the failure happened before the call to of_node_get(). Fix this by adding proper error handling. Note that calling gpiochip_remove_pin_ranges() multiple times causes no harm: subsequent calls are a no-op. Fixes: dfbd379ba9b7431e ("gpio: of: Return error if gpio hog configuration failed") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/gpiolib-of.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 0220dd6d64ed..6a3ec575a404 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -718,7 +718,13 @@ int of_gpiochip_add(struct gpio_chip *chip)
of_node_get(chip->of_node);
- return of_gpiochip_scan_gpios(chip);
+ status = of_gpiochip_scan_gpios(chip);
+ if (status) {
+ of_node_put(chip->of_node);
+ gpiochip_remove_pin_ranges(chip);
+ }
+
+ return status;
}
void of_gpiochip_remove(struct gpio_chip *chip)