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block: drop references taken by class_find_device() 

Otherwise we leak references, which is not a good thing to do.


Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2008-08-16 14:30:30 +02:00 committed by Greg Kroah-Hartman
parent 068281d302
commit 5c0ef6d021
1 changed files with 16 additions and 6 deletions
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22
block/genhd.c
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@ -313,8 +313,10 @@ static void *part_start(struct seq_file *part, loff_t *pos)
mutex_lock(&block_class_lock);
dev = class_find_device(&block_class, NULL, &k, find_start);
if (dev)
if (dev) {
put_device(dev);
return dev_to_disk(dev);
}
return NULL;
}
@ -331,8 +333,10 @@ static void *part_next(struct seq_file *part, void *v, loff_t *pos)
struct device *dev;
++*pos;
dev = class_find_device(&block_class, &gp->dev, NULL, find_next);
if (dev)
if (dev) {
put_device(dev);
return dev_to_disk(dev);
}
return NULL;
}
@ -573,8 +577,10 @@ static void *diskstats_start(struct seq_file *part, loff_t *pos)
mutex_lock(&block_class_lock);
dev = class_find_device(&block_class, NULL, &k, find_start);
if (dev)
if (dev) {
put_device(dev);
return dev_to_disk(dev);
}
return NULL;
}
@ -585,8 +591,10 @@ static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
++*pos;
dev = class_find_device(&block_class, &gp->dev, NULL, find_next);
if (dev)
if (dev) {
put_device(dev);
return dev_to_disk(dev);
}
return NULL;
}
@ -714,10 +722,12 @@ dev_t blk_lookup_devt(const char *name, int part)
mutex_lock(&block_class_lock);
find.name = name;
find.part = part;
dev = class_find_device(&block_class, NULL, (void *)&find, match_id);
if (dev)
dev = class_find_device(&block_class, NULL, &find, match_id);
if (dev) {
put_device(dev);
devt = MKDEV(MAJOR(dev->devt),
MINOR(dev->devt) + part);
}
mutex_unlock(&block_class_lock);
return devt;