[PATCH 2/3] scsi: qla2xxx: Fix failure message in qlt_disable_vha()

[Viacheslav Dubeyko <v.dubeiko@yadro.com>]

From: Viacheslav Dubeyko <v.dubeiko@yadro.com>
Date: Wed, 22 Apr 2020 13:51:51 +0300
Subject: [PATCH 2/3] scsi: qla2xxx: Fix failure message in qlt_disable_vha()

The sequence of commands is able to reveal the incorrect
failure message:

echo 0x7fffffff > /sys/module/qla2xxx/parameters/logging
modprobe target_core_mod
modprobe tcm_qla2xxx
mkdir /sys/kernel/config/target/qla2xxx
mkdir /sys/kernel/config/target/qla2xxx/<port-name>
mkdir /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1
echo 1 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable
echo 0 > /sys/kernel/config/target/qla2xxx/<port-name>/tpgt_1/enable

qla2xxx [0001:00:02.0]-e881:1: qla2x00_wait_for_hba_online() failed

The reason of this message is the QLA_FUNCTION_FAILED code
that qla2x00_wait_for_hba_online() returns. However,
qlt_disable_vha() expects that adapter is offlined and
QLA_FUNCTION_FAILED informs namely about the offline
state of the adapter.

The qla2x00_abort_isp() function finishes the execution
at the point of checking the adapter's mode (for example,
qla_tgt_mode_enabled()) because of the qlt_disable_vha()
calls qlt_clear_mode() method. It means that qla2x00_abort_isp()
keeps vha->flags.online is equal to zero. Finally,
qla2x00_wait_for_hba_online() checks the state of this flag
and returns QLA_FUNCTION_FAILED error code.

This patch change the failure message on the message
that informs about adapter's offline state.

Signed-off-by: Viacheslav Dubeyko <v.dubeiko@yadro.com>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 622e7337affc..f3255aa70dcc 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -6661,9 +6661,14 @@ static void qlt_disable_vha(struct scsi_qla_host *vha)
 
 	set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 	qla2xxx_wake_dpc(vha);
+
+	/*
+	 * We are expecting the offline state.
+	 * QLA_FUNCTION_FAILED means that adapter is offline.
+	 */
 	if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
 		ql_dbg(ql_dbg_tgt, vha, 0xe081,
-		       "qla2x00_wait_for_hba_online() failed\n");
+		       "adapter is offline\n");
 }
 
 /*
-- 
2.17.1