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path: root/drivers/block/loop.c
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Diffstat (limited to 'drivers/block/loop.c')
-rw-r--r--drivers/block/loop.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index e2fc4b6..5526ead 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printk(KERN_INFO "loop: the max_loop option is obsolete "
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