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authorAlasdair G Kergon <agk@redhat.com>2005-07-29 08:15:59 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-29 08:46:03 +0400
commit4e90188be4a56f37fbb4ffb5b58745683526dcb9 (patch)
treedde381c2419cce6e529729fd361bf0b9b90392ac
parentcf222b3769c3759488579441ab724ed33a2da5f4 (diff)
downloadlinux-4e90188be4a56f37fbb4ffb5b58745683526dcb9.tar.xz
[PATCH] device-mapper: fix deadlocks in core
Avoid another bdget_disk which can deadlock. Signed-Off-By: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/md/dm.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f0cd8ea327d3..88f1f27526cc 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -825,18 +825,13 @@ static void event_callback(void *context)
wake_up(&md->eventq);
}
-static void __set_size(struct gendisk *disk, sector_t size)
+static void __set_size(struct mapped_device *md, sector_t size)
{
- struct block_device *bdev;
-
- set_capacity(disk, size);
- bdev = bdget_disk(disk, 0);
- if (bdev) {
- down(&bdev->bd_inode->i_sem);
- i_size_write(bdev->bd_inode, (loff_t)size << SECTOR_SHIFT);
- up(&bdev->bd_inode->i_sem);
- bdput(bdev);
- }
+ set_capacity(md->disk, size);
+
+ down(&md->frozen_bdev->bd_inode->i_sem);
+ i_size_write(md->frozen_bdev->bd_inode, (loff_t)size << SECTOR_SHIFT);
+ up(&md->frozen_bdev->bd_inode->i_sem);
}
static int __bind(struct mapped_device *md, struct dm_table *t)
@@ -845,7 +840,7 @@ static int __bind(struct mapped_device *md, struct dm_table *t)
sector_t size;
size = dm_table_get_size(t);
- __set_size(md->disk, size);
+ __set_size(md, size);
if (size == 0)
return 0;