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dm mpath: fix support for loading scsi_dh modules during table load

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The ability to have multipath dynamically attach a scsi_dh, that the user
specified in the multipath table, was broken by commit e8f74a0f00 ("dm
mpath: eliminate need to use scsi_device_from_queue").

Restore the ability to load, and attach, a particular scsi_dh module if
one is specified (as noticed by checking m->hw_handler_name).

Fixes: e8f74a0f00 ("dm mpath: eliminate need to use scsi_device_from_queue")
Reported-by: Paul Mackerras <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
This commit is contained in:
Mike Snitzer 2018-03-29 11:50:10 -04:00
commit e457edf0b2
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-mpath.c
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@ -887,7 +887,7 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps
q = bdev_get_queue(p->path.dev->bdev);
attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL);
if (attached_handler_name) {
if (attached_handler_name || m->hw_handler_name) {
INIT_DELAYED_WORK(&p->activate_path, activate_path_work);
r = setup_scsi_dh(p->path.dev->bdev, m, attached_handler_name, &ti->error);
if (r) {