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A fix for stacked dm thin devices and a fix for the new dm WRITE SAME

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Merge tag 'dm-3.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm

Pull more device-mapper fixes from Alasdair G Kergon:
 "A fix for stacked dm thin devices and a fix for the new dm WRITE SAME
  support."

* tag 'dm-3.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm:
  dm: fix write same requests counting
  dm thin: fix queue limits stacking
This commit is contained in:
Linus Torvalds 2013-02-01 12:04:22 +11:00
commit cc6c954a07
2 changed files with 5 additions and 14 deletions
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13
drivers/md/dm-thin.c
View File

@ -2746,19 +2746,9 @@ static int thin_iterate_devices(struct dm_target *ti,
return 0;
}
/*
* A thin device always inherits its queue limits from its pool.
*/
static void thin_io_hints(struct dm_target *ti, struct queue_limits *limits)
{
struct thin_c *tc = ti->private;
*limits = bdev_get_queue(tc->pool_dev->bdev)->limits;
}
static struct target_type thin_target = {
.name = "thin",
.version = {1, 6, 0},
.version = {1, 7, 0},
.module = THIS_MODULE,
.ctr = thin_ctr,
.dtr = thin_dtr,
@ -2767,7 +2757,6 @@ static struct target_type thin_target = {
.postsuspend = thin_postsuspend,
.status = thin_status,
.iterate_devices = thin_iterate_devices,
.io_hints = thin_io_hints,
};
/*----------------------------------------------------------------*/

6
drivers/md/dm.c
View File

@ -1188,6 +1188,7 @@ static int __clone_and_map_changing_extent_only(struct clone_info *ci,
{
struct dm_target *ti;
sector_t len;
unsigned num_requests;
do {
ti = dm_table_find_target(ci->map, ci->sector);
@ -1200,7 +1201,8 @@ static int __clone_and_map_changing_extent_only(struct clone_info *ci,
* reconfiguration might also have changed that since the
* check was performed.
*/
if (!get_num_requests || !get_num_requests(ti))
num_requests = get_num_requests ? get_num_requests(ti) : 0;
if (!num_requests)
return -EOPNOTSUPP;
if (is_split_required && !is_split_required(ti))
@ -1208,7 +1210,7 @@ static int __clone_and_map_changing_extent_only(struct clone_info *ci,
else
len = min(ci->sector_count, max_io_len(ci->sector, ti));
__issue_target_requests(ci, ti, ti->num_discard_requests, len);
__issue_target_requests(ci, ti, num_requests, len);
ci->sector += len;
} while (ci->sector_count -= len);