redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

dm mpath: fix stalls when handling invalid ioctls 

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@suse.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
hifive-unleashed-5.1
Hannes Reinecke 2014-02-26 10:07:04 +01:00 committed by Mike Snitzer
parent 1acacc0784
commit a1989b3300
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/md/dm-mpath.c
View File

@ -1626,8 +1626,11 @@ 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);