linux-kernel - [PATCH 5.4 177/260] scsi: qla2xxx: Changes to support kdump kernel

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Date:   Mon, 20 Sep 2021 18:43:15 +0200
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@...cle.com>,
        Saurav Kashyap <skashyap@...vell.com>,
        Nilesh Javali <njavali@...vell.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 5.4 177/260] scsi: qla2xxx: Changes to support kdump kernel

From: Saurav Kashyap <skashyap@...vell.com>

commit 62e0dec59c1e139dab55aff5aa442adc97804271 upstream.

Avoid allocating firmware dump and only allocate a single queue for a kexec
kernel.

Link: https://lore.kernel.org/r/20210810043720.1137-12-njavali@marvell.com
Cc: stable@...r.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@...cle.com>
Signed-off-by: Saurav Kashyap <skashyap@...vell.com>
Signed-off-by: Nilesh Javali <njavali@...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_os.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/blk-mq-pci.h>
 #include <linux/refcount.h>
+#include <linux/crash_dump.h>
 
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
@@ -2799,6 +2800,11 @@ qla2x00_probe_one(struct pci_dev *pdev,
 			return ret;
 	}
 
+	if (is_kdump_kernel()) {
+		ql2xmqsupport = 0;
+		ql2xallocfwdump = 0;
+	}
+
 	/* This may fail but that's ok */
 	pci_enable_pcie_error_reporting(pdev);