diff options
| author | Jonathan Corbet <corbet@lwn.net> | 2008-05-16 14:19:56 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2008-06-20 14:05:52 -0600 |
| commit | 26ce4f0684ef4b96d0244ac58b89ec282d5b980c (patch) | |
| tree | b8610c3ffa6d4d5ceb97d1214907da5f56bb6f2b /drivers/macintosh | |
| parent | 3462032d66703ef7721329b44fe2dac4aaef475d (diff) | |
| download | lwn-26ce4f0684ef4b96d0244ac58b89ec282d5b980c.tar.gz lwn-26ce4f0684ef4b96d0244ac58b89ec282d5b980c.zip | |
adb: BKL pushdown
Put explicit lock_kernel() calls in adb_open(). The fact that
adb_release() already has them suggests this is necessary.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/macintosh')
| -rw-r--r-- | drivers/macintosh/adb.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c index dbaad39020a1..40c70ba62bf0 100644 --- a/drivers/macintosh/adb.c +++ b/drivers/macintosh/adb.c @@ -644,12 +644,18 @@ do_adb_query(struct adb_request *req) static int adb_open(struct inode *inode, struct file *file) { struct adbdev_state *state; + int ret = 0; - if (iminor(inode) > 0 || adb_controller == NULL) - return -ENXIO; + lock_kernel(); + if (iminor(inode) > 0 || adb_controller == NULL) { + ret = -ENXIO; + goto out; + } state = kmalloc(sizeof(struct adbdev_state), GFP_KERNEL); - if (state == 0) - return -ENOMEM; + if (state == 0) { + ret = -ENOMEM; + goto out; + } file->private_data = state; spin_lock_init(&state->lock); atomic_set(&state->n_pending, 0); @@ -657,7 +663,9 @@ static int adb_open(struct inode *inode, struct file *file) init_waitqueue_head(&state->wait_queue); state->inuse = 1; - return 0; +out: + unlock_kernel(); + return ret; } static int adb_release(struct inode *inode, struct file *file) |