diff options
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 f389ed6998f..0d347a70583 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; |