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authorShlomo Pongratz <shlomop@mellanox.com>2013-05-05 17:36:26 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-19 10:54:49 -0700
commit173603ab8ed8aff22b3606abf3b1dc591cc5ccd7 (patch)
tree70baf68671f58f4a2ad590e83c5991bb515a9912
parentb1f6964aaa88bbd9695a51fc7b46177bed91e425 (diff)
iscsi-target: Fix processing of OOO commands
commit 3eccfdb01da58fbd0f789ae6ca61cee3769e26de upstream. 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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/target/iscsi/iscsi_target_erl1.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index 006f605edb0..fd669b5a045 100644
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -824,7 +824,7 @@ 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 {
@@ -834,11 +834,12 @@ 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;
}
}