iscsi-target: Fix processing of OOO commands

Fix two issues in OOO commands processing done at iscsit_attach_ooo_cmdsn.

Handle command serial numbers wrap around by using iscsi_sna_lt and not regular comparisson.

The routine iterates until it finds an entry whose serial number is greater than the serial number of
the new one, thus the new entry should be inserted before that entry and not after.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index 7816af6cdd1209f7e09ac31adc027ab80b3663de..40d9dbca987b25a811ca0fb75c9c0277f65933a8 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -823,7 +823,7 @@ static int iscsit_attach_ooo_cmdsn(
                /*
                 * CmdSN is greater than the tail of the list.
                 */
-               if (ooo_tail->cmdsn < ooo_cmdsn->cmdsn)
+               if (iscsi_sna_lt(ooo_tail->cmdsn, ooo_cmdsn->cmdsn))
                        list_add_tail(&ooo_cmdsn->ooo_list,
                                        &sess->sess_ooo_cmdsn_list);
                else {
@@ -833,11 +833,12 @@ static int iscsit_attach_ooo_cmdsn(
                         */
                        list_for_each_entry(ooo_tmp, &sess->sess_ooo_cmdsn_list,
                                                ooo_list) {
-                               if (ooo_tmp->cmdsn < ooo_cmdsn->cmdsn)
+                               if (iscsi_sna_lt(ooo_tmp->cmdsn, ooo_cmdsn->cmdsn))
                                        continue;
 
+                               /* Insert before this entry */
                                list_add(&ooo_cmdsn->ooo_list,
-                                       &ooo_tmp->ooo_list);
+                                       ooo_tmp->ooo_list.prev);
                                break;
                        }
                }