diff options
Diffstat (limited to 'drivers/gpio/gpio-mockup.c')
| -rw-r--r-- | drivers/gpio/gpio-mockup.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c index 68a0c1e06a16..532f5807390b 100644 --- a/drivers/gpio/gpio-mockup.c +++ b/drivers/gpio/gpio-mockup.c @@ -335,6 +335,15 @@ static int __init gpio_mockup_init(void) /* Each chip is described by two values. */ num_chips = gpio_mockup_params_nr / 2; + /* + * The second value in the <base GPIO - number of GPIOS> pair must + * always be greater than 0. + */ + for (i = 0; i < num_chips; i++) { + if (gpio_mockup_ranges[i * 2 + 1] < 0) + return -EINVAL; + } + gpio_mockup_dbg_dir = debugfs_create_dir("gpio-mockup-event", NULL); if (IS_ERR_OR_NULL(gpio_mockup_dbg_dir)) gpio_mockup_err("error creating debugfs directory\n"); |