linux-kernel - [PATCH] scsi: qla2xxxx: avoid type mismatch in comparison

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Message-ID: <1603472.f34vvTrhuN@wuerfel>
Date:	Wed, 20 Jan 2016 11:47:14 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Nicholas Bellinger <nab@...ux-iscsi.org>
Cc:	qla2xxx-upstream@...gic.com,
	"James E.J. Bottomley" <JBottomley@...n.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Alexei Potashnik <alexei@...estorage.com>,
	Quinn Tran <quinn.tran@...gic.com>,
	Himanshu Madhani <himanshu.madhani@...gic.com>,
	Hannes Reinecke <hare@...e.com>
Subject: [PATCH] scsi: qla2xxxx: avoid type mismatch in comparison

A recent bug fix added code that does

        bool logged_out = (status & 0xFFFF);
        if (logged_out == CTIO_PORT_LOGGED_OUT)
		...

This looks wrong because we are comparing a boolean with an
integer constant, ang gcc warns about it accordingly:

drivers/scsi/qla2xxx/qla_target.c: In function 'qlt_do_ctio_completion':
drivers/scsi/qla2xxx/qla_target.c:3587:20: warning: comparison of constant '41' with boolean expression is always false [-Wbool-compare]
        (logged_out == CTIO_PORT_LOGGED_OUT) ?

The correct fix is presumably to make that variable an 'int'.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 71cdc0796465 ("qla2xxx: Delete session if initiator is gone from FW")
---
The patch introducing this is currenly in linux-next through the target-updates/for-next
branch.

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index c7ab9e69c881..8075a4cdb45c 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -3580,7 +3580,7 @@ static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
 		case CTIO_PORT_LOGGED_OUT:
 		case CTIO_PORT_UNAVAILABLE:
 		{
-			bool logged_out = (status & 0xFFFF);
+			int logged_out = (status & 0xFFFF);
 			ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
 			    "qla_target(%d): CTIO with %s status %x "
 			    "received (state %x, se_cmd %p)\n", vha->vp_idx,