From: Prasanna Mumbai <prasanna.mumbai@qlogic.com>
Date: Thu, 8 Dec 2011 05:29:35 +0000 (+0530)
Subject: qla4xxx: clear the SCSI COMPLETION INTERRUPT bit during firmware init
X-Git-Tag: v2.6.39-400.9.0~678
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=647f022e0243cb7bef39696c7b038b4e6da8c7b7;p=users%2Fjedix%2Flinux-maple.git

qla4xxx: clear the SCSI COMPLETION INTERRUPT bit during firmware init

Fix for the kdump kernel panic issue on 40xx adapters.

JIRA Key: IUEKR2ISCSI-10

Signed-off-by: Nilesh Javali <nilesh.javali@qlogic.com>
Signed-off-by: Prasanna Mumbai <prasanna.mumbai@qlogic.com>
Signed-off-by: Tej Parkash <tej.parkash@qlogic.com>
---

diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c
index 204138111d5a..cf2ab4e2d16c 100644
--- a/drivers/scsi/qla4xxx/ql4_init.c
+++ b/drivers/scsi/qla4xxx/ql4_init.c
@@ -697,6 +697,9 @@ int qla4xxx_start_firmware(struct scsi_qla_host *ha)
 			writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
 			       &ha->reg->ctrl_status);
 			readl(&ha->reg->ctrl_status);
+			writel(set_rmask(CSR_SCSI_COMPLETION_INTR),
+				&ha->reg->ctrl_status);
+			readl(&ha->reg->ctrl_status);
 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
 			if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS) {
 				DEBUG2(printk("scsi%ld: %s: Get firmware "