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-rw-r--r--drivers/uio/uio.c16
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: