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authorJens Axboe <jaxboe@fusionio.com>2011-05-30 07:42:51 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-05-30 07:42:51 +0200
commita1706ac4c0201ea0143dc0db0659001b26ceeabb (patch)
tree51b1fc266708d34e0878eaf1e6435773067379a0 /fs/partitions/check.c
parent5988ce239682854d4e632fb58bff000700830394 (diff)
downloadlinux-a1706ac4c0201ea0143dc0db0659001b26ceeabb.tar.bz2
Revert "block: Remove extra discard_alignment from hd_struct."
It was not a good idea to start dereferencing disk->queue from the fs sysfs strategy for displaying discard alignment. We ran into first a NULL pointer deref, and after fixing that we sometimes see unvalid disk->queue pointer values. Since discard is the only one of the bunch actually looking into the queue, just revert the change. This reverts commit 23ceb5b7719e9276d4fa72a3ecf94dd396755276. Conflicts: fs/partitions/check.c
Diffstat (limited to 'fs/partitions/check.c')
-rw-r--r--fs/partitions/check.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index f82e762eeca2..d545e97d99c3 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -255,13 +255,7 @@ ssize_t part_discard_alignment_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hd_struct *p = dev_to_part(dev);
- struct gendisk *disk = dev_to_disk(dev);
- unsigned int alignment = 0;
-
- if (disk->queue)
- alignment = queue_limit_discard_alignment(&disk->queue->limits,
- p->start_sect);
- return sprintf(buf, "%u\n", alignment);
+ return sprintf(buf, "%u\n", p->discard_alignment);
}
ssize_t part_stat_show(struct device *dev,
@@ -455,6 +449,8 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
p->start_sect = start;
p->alignment_offset =
queue_limit_alignment_offset(&disk->queue->limits, start);
+ p->discard_alignment =
+ queue_limit_discard_alignment(&disk->queue->limits, start);
p->nr_sects = len;
p->partno = partno;
p->policy = get_disk_ro(disk);