From 5c0ef6d0214a08e5c846f4c45228adf135d8d0ef Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Sat, 16 Aug 2008 14:30:30 +0200 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- block/genhd.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index f34befc54847..656c2c7abf99 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -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; -- 2.20.1