diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/md/dm-mpath.c | 27 |
2 files changed, 7 insertions, 22 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index d5415eedba86..3e01e6fb3424 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -393,7 +393,7 @@ config DM_MULTIPATH # of SCSI_DH if the latter isn't defined but if # it is, DM_MULTIPATH must depend on it. We get a build # error if SCSI_DH=m and DM_MULTIPATH=y - depends on SCSI_DH || !SCSI_DH + depends on !SCSI_DH || SCSI ---help--- Allow volume managers to support multipath hardware. diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index eff7bdd7731d..5a67671a3973 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -159,12 +159,9 @@ static struct priority_group *alloc_priority_group(void) static void free_pgpaths(struct list_head *pgpaths, struct dm_target *ti) { struct pgpath *pgpath, *tmp; - struct multipath *m = ti->private; list_for_each_entry_safe(pgpath, tmp, pgpaths, list) { list_del(&pgpath->list); - if (m->hw_handler_name) - scsi_dh_detach(bdev_get_queue(pgpath->path.dev->bdev)); dm_put_device(ti, pgpath->path.dev); free_pgpath(pgpath); } @@ -580,6 +577,7 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps q = bdev_get_queue(p->path.dev->bdev); if (m->retain_attached_hw_handler) { +retain: attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL); if (attached_handler_name) { /* @@ -599,20 +597,14 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps } if (m->hw_handler_name) { - /* - * Increments scsi_dh reference, even when using an - * already-attached handler. - */ r = scsi_dh_attach(q, m->hw_handler_name); if (r == -EBUSY) { - /* - * Already attached to different hw_handler: - * try to reattach with correct one. - */ - scsi_dh_detach(q); - r = scsi_dh_attach(q, m->hw_handler_name); - } + char b[BDEVNAME_SIZE]; + printk(KERN_INFO "dm-mpath: retaining handler on device %s\n", + bdevname(p->path.dev->bdev, b)); + goto retain; + } if (r < 0) { ti->error = "error attaching hardware handler"; dm_put_device(ti, p->path.dev); @@ -624,7 +616,6 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps if (r < 0) { ti->error = "unable to set hardware " "handler parameters"; - scsi_dh_detach(q); dm_put_device(ti, p->path.dev); goto bad; } @@ -734,12 +725,6 @@ static int parse_hw_handler(struct dm_arg_set *as, struct multipath *m) return 0; m->hw_handler_name = kstrdup(dm_shift_arg(as), GFP_KERNEL); - if (!try_then_request_module(scsi_dh_handler_exist(m->hw_handler_name), - "scsi_dh_%s", m->hw_handler_name)) { - ti->error = "unknown hardware handler type"; - ret = -EINVAL; - goto fail; - } if (hw_argc > 1) { char *p; |