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Commit 26ce4f06 authored by Jonathan Corbet's avatar Jonathan Corbet
Browse files

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: default avatarJonathan Corbet <corbet@lwn.net>
parent 3462032d

drivers/macintosh/adb.c

+13 −5
Original line number Diff line number Diff line
@@ -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)