[U-Boot] [PATCH] gpio: check request result

Make sure the pin request passed before attempting to use it later on.

Signed-off-by: Mike Frysinger vapier@gentoo.org --- common/cmd_gpio.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/common/cmd_gpio.c b/common/cmd_gpio.c index 9c9de28..9cc790a 100644 --- a/common/cmd_gpio.c +++ b/common/cmd_gpio.c @@ -57,7 +57,10 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) goto show_usage;

/* grab the pin before we tweak it */ - gpio_request(gpio, "cmd_gpio"); + if (gpio_request(gpio, "cmd_gpio")) { + printf("gpio: requesting pin %u failed\n", gpio); + return -1; + }

/* finally, let's do it: set direction and exec command */ if (sub_cmd == GPIO_INPUT) {