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acrn-kernel
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UIO: cdev lock_kernel() pushdown 

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-15 10:39:37 -06:00
parent 2edbf8537e
commit fbc8a81d66
1 changed files with 12 additions and 5 deletions
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17
drivers/uio/uio.c
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@ -297,12 +297,17 @@ static int uio_open(struct inode *inode, struct file *filep)
struct uio_listener *listener;
int ret = 0;
lock_kernel();
idev = idr_find(&uio_idr, iminor(inode));
if (!idev)
return -ENODEV;
if (!idev) {
ret = -ENODEV;
goto out;
}
if (!try_module_get(idev->owner))
return -ENODEV;
if (!try_module_get(idev->owner)) {
ret = -ENODEV;
goto out;
}
listener = kmalloc(sizeof(*listener), GFP_KERNEL);
if (!listener) {
@ -319,7 +324,7 @@ static int uio_open(struct inode *inode, struct file *filep)
if (ret)
goto err_infoopen;
}
unlock_kernel();
return 0;
err_infoopen:
@ -329,6 +334,8 @@ static int uio_open(struct inode *inode, struct file *filep)
module_put(idev->owner);
out:
unlock_kernel();
return ret;
}