diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-15 16:39:37 (GMT) |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 20:05:47 (GMT) |
| commit | fbc8a81d66bbbce3f0b4d5752f8bc8bb3c1fc439 (patch) | |
| tree | 7a96eba56ea94a4b2a6ce95f4ad4d8ced0960ed9 /drivers/uio | |
| parent | 2edbf8537edc62c9b0ef75e7025d01e8b6a48707 (diff) | |
| download | linux-fbc8a81d66bbbce3f0b4d5752f8bc8bb3c1fc439.tar.xz | |
UIO: cdev lock_kernel() pushdown
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/uio')
| -rw-r--r-- | drivers/uio/uio.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 55cc7b8..1a0415e 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -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 @@ err_alloc_listener: module_put(idev->owner); +out: + unlock_kernel(); return ret; } |