iscsi-target: Fix CmdSN comparison (use cmd->cmd_sn instead of cmd->stat_sn)

commit 64fe4f4f181cc2fe97d4176bf6ee6e3725ae33ec upstream.

Commit 64c13330a389 ("iscsi-target: Fix bug in handling of ExpStatSN
ACK during u32 wrap-around") introduced a bug where we compare the
wrong SN against our ExpCmdSN.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/target/iscsi/iscsi_target_erl2.c b/drivers/target/iscsi/iscsi_target_erl2.c
index 9ac4c151eae43af4efdaac0b0f36c1ef301f068f..ba6091bf93fcde3c1463d6ba54a8ae07f812ddf0 100644 (file)
--- a/drivers/target/iscsi/iscsi_target_erl2.c
+++ b/drivers/target/iscsi/iscsi_target_erl2.c
@@ -372,7 +372,7 @@ int iscsit_prepare_cmds_for_realligance(struct iscsi_conn *conn)
                 * made generic here.
                 */
                if (!(cmd->cmd_flags & ICF_OOO_CMDSN) && !cmd->immediate_cmd &&
-                    iscsi_sna_gte(cmd->stat_sn, conn->sess->exp_cmd_sn)) {
+                    iscsi_sna_gte(cmd->cmd_sn, conn->sess->exp_cmd_sn)) {
                        list_del(&cmd->i_conn_node);
                        spin_unlock_bh(&conn->cmd_lock);
                        iscsit_free_cmd(cmd);