diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/loop.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index e2fc4b6734c..5526eadb659 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -1399,6 +1399,11 @@ static struct loop_device *loop_init_one(int i) struct loop_device *lo; struct gendisk *disk; + list_for_each_entry(lo, &loop_devices, lo_list) { + if (lo->lo_number == i) + return lo; + } + lo = kzalloc(sizeof(*lo), GFP_KERNEL); if (!lo) goto out; @@ -1443,17 +1448,13 @@ static void loop_del_one(struct loop_device *lo) kfree(lo); } -static int loop_lock(dev_t dev, void *data) -{ - mutex_lock(&loop_devices_mutex); - return 0; -} - static struct kobject *loop_probe(dev_t dev, int *part, void *data) { - struct loop_device *lo = loop_init_one(dev & MINORMASK); + struct loop_device *lo; struct kobject *kobj; + mutex_lock(&loop_devices_mutex); + lo = loop_init_one(dev & MINORMASK); kobj = lo ? get_disk(lo->lo_disk) : ERR_PTR(-ENOMEM); mutex_unlock(&loop_devices_mutex); @@ -1466,7 +1467,7 @@ static int __init loop_init(void) if (register_blkdev(LOOP_MAJOR, "loop")) return -EIO; blk_register_region(MKDEV(LOOP_MAJOR, 0), 1UL << MINORBITS, - THIS_MODULE, loop_probe, loop_lock, NULL); + THIS_MODULE, loop_probe, NULL, NULL); if (max_loop) { printk(KERN_INFO "loop: the max_loop option is obsolete " |