linux-kernel - [PATCH 4.13 32/43] scsi: qla2xxx: Initialize Work element before requesting IRQs

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Date:   Tue, 31 Oct 2017 10:55:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Himanshu Madhani <himanshu.madhani@...ium.com>,
        Quinn Tran <quinn.tran@...ium.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.13 32/43] scsi: qla2xxx: Initialize Work element before requesting IRQs

4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Himanshu Madhani <himanshu.madhani@...ium.com>

commit 1010f21ecf8ac43be676d498742de18fa6c20987 upstream.

commit a9e170e28636 ("scsi: qla2xxx: Fix uninitialized work element")
moved initializiation of work element earlier in the probe to fix call
stack. However, it still leaves a window where interrupt can be
generated before work element is initialized. Fix that window by
initializing work element before we are requesting IRQs.

[mkp: fixed typos]

Fixes: a9e170e28636 ("scsi: qla2xxx: Fix uninitialized work element")
Signed-off-by: Himanshu Madhani <himanshu.madhani@...ium.com>
Signed-off-by: Quinn Tran <quinn.tran@...ium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_os.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -3051,6 +3051,8 @@ qla2x00_probe_one(struct pci_dev *pdev,
 	    host->max_cmd_len, host->max_channel, host->max_lun,
 	    host->transportt, sht->vendor_id);

+	INIT_WORK(&base_vha->iocb_work, qla2x00_iocb_work_fn);
+
 	/* Set up the irqs */
 	ret = qla2x00_request_irqs(ha, rsp);
 	if (ret)
@@ -3165,8 +3167,6 @@ qla2x00_probe_one(struct pci_dev *pdev,
 	    host->can_queue, base_vha->req,
 	    base_vha->mgmt_svr_loop_id, host->sg_tablesize);

-	INIT_WORK(&base_vha->iocb_work, qla2x00_iocb_work_fn);
-
 	if (ha->mqenable) {
 		bool mq = false;
 		bool startit = false;