aboutsummaryrefslogtreecommitdiff
path: root/drivers/uio
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/uio')
-rw-r--r--drivers/uio/uio.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 10a029b2415..d2efe823c20 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -381,7 +381,13 @@ static int uio_get_minor(struct uio_device *idev)
retval = -ENOMEM;
goto exit;
}
- idev->minor = id & MAX_ID_MASK;
+ if (id < UIO_MAX_DEVICES) {
+ idev->minor = id;
+ } else {
+ dev_err(idev->dev, "too many uio devices\n");
+ retval = -EINVAL;
+ idr_remove(&uio_idr, id);
+ }
exit:
mutex_unlock(&minor_lock);
return retval;