diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-03-28 14:13:47 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-03-28 17:58:34 +0100 |
| commit | f7299d441a4da8a5088e651ea55023525a793a13 (patch) | |
| tree | 707a89a002434ede152561da9bb2a3344afce331 | |
| parent | 7ce40277bf848391705011ba37eac2e377cbd9e6 (diff) | |
| download | linux-0-day-f7299d441a4da8a5088e651ea55023525a793a13.tar.gz linux-0-day-f7299d441a4da8a5088e651ea55023525a793a13.tar.xz | |
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>
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 0220dd6d64ed7..6a3ec575a404e 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) |