From: Hannes Reinecke <hare@xxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit a1989b330093578ea5470bea0a00f940c444c466 upstream.
An invalid ioctl will never be valid, irrespective of whether multipath
has active paths or not. So for invalid ioctls we do not have to wait
for multipath to activate any paths, but can rather return an error
code immediately. This fix resolves numerous instances of:
udevd[]: worker [] unexpectedly returned with status 0x0100
that have been seen during testing.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/md/dm-mpath.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 799e479db93b..709ce1b2582e 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1623,8 +1623,11 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd,
/*
* Only pass ioctls through if the device sizes match exactly.
*/
- if (!r && ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT)
- r = scsi_verify_blk_ioctl(NULL, cmd);
+ if (!bdev || ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT) {
+ int err = scsi_verify_blk_ioctl(NULL, cmd);
+ if (err)
+ r = err;
+ }
if (r == -ENOTCONN && !fatal_signal_pending(current))
queue_work(kmultipathd, &m->process_queued_ios);
--
1.9.0
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