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adb: BKL pushdown

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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>
This commit is contained in:
Jonathan Corbet 2008-05-16 14:19:56 -06:00
parent 3462032d66
commit 26ce4f0684
1 changed files with 13 additions and 5 deletions
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18
drivers/macintosh/adb.c
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@ -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)