diff options
| -rw-r--r-- | drivers/uio/uio.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 144cf7365288..3f76e38e6f30 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -624,6 +624,12 @@ static ssize_t uio_write(struct file *filep, const char __user *buf, ssize_t retval; s32 irq_on; + if (count != sizeof(s32)) + return -EINVAL; + + if (copy_from_user(&irq_on, buf, count)) + return -EFAULT; + mutex_lock(&idev->info_lock); if (!idev->info) { retval = -EINVAL; @@ -635,21 +641,11 @@ static ssize_t uio_write(struct file *filep, const char __user *buf, goto out; } - if (count != sizeof(s32)) { - retval = -EINVAL; - goto out; - } - if (!idev->info->irqcontrol) { retval = -ENOSYS; goto out; } - if (copy_from_user(&irq_on, buf, count)) { - retval = -EFAULT; - goto out; - } - retval = idev->info->irqcontrol(idev->info, irq_on); out: |