Make sure the pin request passed before attempting to use it later on.
Signed-off-by: Mike Frysinger <vap...@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) {
--
1.7.5.rc1
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