[PATCH 03/10] mpt3sas: implement _dechain_st()

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Split off _dechain_st() as separate function.
No functional change.

Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 09d0008..120b317 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -2365,6 +2365,19 @@ static int mpt3sas_remove_dead_ioc_func(void *arg)
 	return smid;
 }
 
+static void
+_dechain_st(struct MPT3SAS_ADAPTER *ioc, struct scsiio_tracker *st)
+{
+	struct chain_tracker *chain_req;
+
+	while (!list_empty(&st->chain_list)) {
+		chain_req = list_first_entry(&st->chain_list,
+					     struct chain_tracker,
+					     tracker_list);
+		list_move(&chain_req->tracker_list, &ioc->free_chain_list);
+	}
+}
+
 /**
  * mpt3sas_base_free_smid - put smid back on free_list
  * @ioc: per adapter object
@@ -2377,20 +2390,12 @@ static int mpt3sas_remove_dead_ioc_func(void *arg)
 {
 	unsigned long flags;
 	int i;
-	struct chain_tracker *chain_req, *next;
 
 	spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
 	if (smid < ioc->hi_priority_smid) {
 		/* scsiio queue */
 		i = smid - 1;
-		if (!list_empty(&ioc->scsi_lookup[i].chain_list)) {
-			list_for_each_entry_safe(chain_req, next,
-			    &ioc->scsi_lookup[i].chain_list, tracker_list) {
-				list_del_init(&chain_req->tracker_list);
-				list_add(&chain_req->tracker_list,
-				    &ioc->free_chain_list);
-			}
-		}
+		_dechain_st(ioc, &ioc->scsi_lookup[i]);
 		ioc->scsi_lookup[i].cb_idx = 0xFF;
 		ioc->scsi_lookup[i].scmd = NULL;
 		ioc->scsi_lookup[i].direct_io = 0;
-- 
1.8.5.6

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