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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-19 13:05:38 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-19 13:05:38 -0700
commita7204d72db251784808b0c050220992d7f833a2c (patch)
tree3491452ea74b039f3278fd95bb7ad7c88b6b3631 /drivers/gpio/gpiolib.c
parentba6857b2d49646f2d4c245ff58d95d145f380177 (diff)
parent31d141e3a666269a3b6fcccddb0351caf7454240 (diff)
Merge 3.12-rc6 into driver-core-next
We want these fixes here too. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpio/gpiolib.c')
-rw-r--r--drivers/gpio/gpiolib.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index a094356020a..dadbac27726 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -136,7 +136,7 @@ static struct gpio_desc *gpio_to_desc(unsigned gpio)
*/
static int desc_to_gpio(const struct gpio_desc *desc)
{
- return desc->chip->base + gpio_chip_hwgpio(desc);
+ return desc - &gpio_desc[0];
}
@@ -1398,7 +1398,7 @@ static int gpiod_request(struct gpio_desc *desc, const char *label)
int status = -EPROBE_DEFER;
unsigned long flags;
- if (!desc || !desc->chip) {
+ if (!desc) {
pr_warn("%s: invalid GPIO\n", __func__);
return -EINVAL;
}
@@ -1406,6 +1406,8 @@ static int gpiod_request(struct gpio_desc *desc, const char *label)
spin_lock_irqsave(&gpio_lock, flags);
chip = desc->chip;
+ if (chip == NULL)
+ goto done;
if (!try_module_get(chip->owner))
goto done;