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authorLee Jones <lee.jones@linaro.org>2013-01-31 12:06:33 +0100
committerLinus Walleij <linus.walleij@linaro.org>2013-02-06 22:38:31 +0100
commitfa1ec996ac1a42e46ec7dca089252f124c81d7bd (patch)
treef426273718c901003868953b3e76137a8e9d493d /drivers/pinctrl/pinctrl-abx500.c
parentpinctrl/lantiq: fix pin number in ltq_pmx_gpio_request_enable (diff)
downloadlinux-fa1ec996ac1a42e46ec7dca089252f124c81d7bd.tar.xz
linux-fa1ec996ac1a42e46ec7dca089252f124c81d7bd.zip
pinctrl/abx500: prevent error path from corrupting returning error
Prior to this patch abx500_gpio_probe() would return the return-value of gpiochip_remove() during its error patch regardless of what the actual failure was. So as long as gpiochip_remove() succeeded, probe() would look like it succeeded too. This patch ensures the correct error value is returned and that mutex_destroy() is invoked if gpiochip_add_pin_range() were to fail. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-abx500.c')
-rw-r--r--drivers/pinctrl/pinctrl-abx500.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/pinctrl/pinctrl-abx500.c b/drivers/pinctrl/pinctrl-abx500.c
index 81ef5152714b..9bdfcb97ef57 100644
--- a/drivers/pinctrl/pinctrl-abx500.c
+++ b/drivers/pinctrl/pinctrl-abx500.c
@@ -1111,7 +1111,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
struct abx500_gpio_platform_data *pdata;
struct abx500_pinctrl *pct;
const struct platform_device_id *platid = platform_get_device_id(pdev);
- int ret;
+ int ret, err;
int i;
pdata = abx500_pdata->gpio;
@@ -1189,6 +1189,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
if (!pct->pctldev) {
dev_err(&pdev->dev,
"could not register abx500 pinctrl driver\n");
+ ret = -EINVAL;
goto out_rem_chip;
}
dev_info(&pdev->dev, "registered pin controller\n");
@@ -1201,7 +1202,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
dev_name(&pdev->dev),
p->offset - 1, p->offset, p->npins);
if (ret < 0)
- return ret;
+ goto out_rem_chip;
}
platform_set_drvdata(pdev, pct);
@@ -1210,8 +1211,8 @@ static int abx500_gpio_probe(struct platform_device *pdev)
return 0;
out_rem_chip:
- ret = gpiochip_remove(&pct->chip);
- if (ret)
+ err = gpiochip_remove(&pct->chip);
+ if (err)
dev_info(&pdev->dev, "failed to remove gpiochip\n");
out_rem_irq:
abx500_gpio_irq_remove(pct);