target: Convert se_lun->lun_deve_lock to normal spinlock

This patch converts se_lun->lun_deve_lock acquire/release access
to use a normal, non bottom-half spin_lock_t for protecting
se_lun->lun_deve_list access.

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index aa2e4b1..c56ae02 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -968,7 +968,7 @@
 			continue;
 		spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
 
-		spin_lock_bh(&lun->lun_deve_lock);
+		spin_lock(&lun->lun_deve_lock);
 		list_for_each_entry(se_deve, &lun->lun_deve_list, lun_link) {
 			lacl = rcu_dereference_check(se_deve->se_lun_acl,
 					lockdep_is_held(&lun->lun_deve_lock));
@@ -1000,7 +1000,7 @@
 			core_scsi3_ua_allocate(se_deve, 0x2A,
 				ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED);
 		}
-		spin_unlock_bh(&lun->lun_deve_lock);
+		spin_unlock(&lun->lun_deve_lock);
 
 		spin_lock(&tg_pt_gp->tg_pt_gp_lock);
 		percpu_ref_put(&lun->lun_ref);