linux-kernel - [PATCH 4.19 003/140] scsi: qla2xxx: Fix driver unload hang

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Message-Id: <20191216174748.887845533@linuxfoundation.org>
Date:   Mon, 16 Dec 2019 18:47:51 +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, "Ewan D. Milne" <emilne@...hat.com>,
        Quinn Tran <qutran@...vell.com>,
        Himanshu Madhani <hmadhani@...vell.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.19 003/140] scsi: qla2xxx: Fix driver unload hang

From: Quinn Tran <qutran@...vell.com>

commit dd322b7f3efc8cda085bb60eadc4aee6324eadd8 upstream.

This patch fixes driver unload hang by removing msleep()

Fixes: d74595278f4ab ("scsi: qla2xxx: Add multiple queue pair functionality.")
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20191105150657.8092-5-hmadhani@marvell.com
Reviewed-by: Ewan D. Milne <emilne@...hat.com>
Signed-off-by: Quinn Tran <qutran@...vell.com>
Signed-off-by: Himanshu Madhani <hmadhani@...vell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_init.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -8725,8 +8725,6 @@ int qla2xxx_delete_qpair(struct scsi_qla
 	struct qla_hw_data *ha = qpair->hw;

 	qpair->delete_in_progress = 1;
-	while (atomic_read(&qpair->ref_count))
-		msleep(500);

 	ret = qla25xx_delete_req_que(vha, qpair->req);
 	if (ret != QLA_SUCCESS)