diff options
| author | Roel Kluin <12o3l@tiscali.nl> | 2007-11-15 02:00:06 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-15 03:45:42 +0100 |
| commit | 5c6ff79d0908df0d281c05b5b693eaba55b06e0f (patch) | |
| tree | 81d276887ab70d83d88d5fc953cae816912381a2 /arch/cris/arch-v10/drivers/gpio.c | |
| parent | rd: fix data corruption on memory pressure (diff) | |
| download | linux-5c6ff79d0908df0d281c05b5b693eaba55b06e0f.tar.xz linux-5c6ff79d0908df0d281c05b5b693eaba55b06e0f.zip | |
cris gpio: undo locks before returning
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Cc: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/cris/arch-v10/drivers/gpio.c')
| -rw-r--r-- | arch/cris/arch-v10/drivers/gpio.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/arch/cris/arch-v10/drivers/gpio.c b/arch/cris/arch-v10/drivers/gpio.c index f389ed6998fe..0d347a705835 100644 --- a/arch/cris/arch-v10/drivers/gpio.c +++ b/arch/cris/arch-v10/drivers/gpio.c @@ -297,8 +297,10 @@ gpio_poll(struct file *file, data = *R_PORT_PB_DATA; else if (priv->minor == GPIO_MINOR_G) data = *R_PORT_G_DATA; - else + else { + spin_unlock(&gpio_lock); return 0; + } if ((data & priv->highalarm) || (~data & priv->lowalarm)) { @@ -381,18 +383,21 @@ static ssize_t gpio_write(struct file * file, const char * buf, size_t count, ssize_t retval = count; if (priv->minor !=GPIO_MINOR_A && priv->minor != GPIO_MINOR_B) { - return -EFAULT; + retval = -EFAULT; + goto out; } if (!access_ok(VERIFY_READ, buf, count)) { - return -EFAULT; + retval = -EFAULT; + goto out; } clk_mask = priv->clk_mask; data_mask = priv->data_mask; /* It must have been configured using the IO_CFG_WRITE_MODE */ /* Perhaps a better error code? */ if (clk_mask == 0 || data_mask == 0) { - return -EPERM; + retval = -EPERM; + goto out; } write_msb = priv->write_msb; D(printk("gpio_write: %lu to data 0x%02X clk 0x%02X msb: %i\n",count, data_mask, clk_mask, write_msb)); @@ -425,6 +430,7 @@ static ssize_t gpio_write(struct file * file, const char * buf, size_t count, } } } +out: spin_unlock(&gpio_lock); return retval; } @@ -506,6 +512,7 @@ gpio_release(struct inode *inode, struct file *filp) while (p) { if (p->highalarm | p->lowalarm) { gpio_some_alarms = 1; + spin_unlock(&gpio_lock); return 0; } p = p->next; |