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authorTakashi Iwai <tiwai@suse.de>2020-04-29 15:56:54 +0200
committerBartosz Golaszewski <bgolaszewski@baylibre.com>2020-05-05 18:24:56 +0200
commit333830aa149a87cabeb5d30fbcf12eecc8040d2c (patch)
tree1667bbad3bc34a8148738fd16d26f0bce8dd8226 /drivers/gpio/gpio-exar.c
parent19c26d90ff4ca08ef2a2fef23cc9c13cfbfd891e (diff)
gpio: exar: Fix bad handling for ida_simple_get error path
The commit 7ecced0934e5 ("gpio: exar: add a check for the return value of ida_simple_get fails") added a goto jump to the common error handler for ida_simple_get() error, but this is wrong in two ways: it doesn't set the proper return code and, more badly, it invokes ida_simple_remove() with a negative index that shall lead to a kernel panic via BUG_ON(). This patch addresses those two issues. Fixes: 7ecced0934e5 ("gpio: exar: add a check for the return value of ida_simple_get fails") Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'drivers/gpio/gpio-exar.c')
-rw-r--r--drivers/gpio/gpio-exar.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index da1ef0b1c291..b1accfba017d 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -148,8 +148,10 @@ static int gpio_exar_probe(struct platform_device *pdev)
mutex_init(&exar_gpio->lock);
index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL);
- if (index < 0)
- goto err_destroy;
+ if (index < 0) {
+ ret = index;
+ goto err_mutex_destroy;
+ }
sprintf(exar_gpio->name, "exar_gpio%d", index);
exar_gpio->gpio_chip.label = exar_gpio->name;
@@ -176,6 +178,7 @@ static int gpio_exar_probe(struct platform_device *pdev)
err_destroy:
ida_simple_remove(&ida_index, index);
+err_mutex_destroy:
mutex_destroy(&exar_gpio->lock);
return ret;
}