From: Saurav Kashyap <saurav.kashyap@qlogic.com>
Date: Tue, 16 Aug 2011 18:31:46 +0000 (-0700)
Subject: [SCSI] qla2xxx: Prevent CPU lockups when "ql2xdontresethba" module param is set.
X-Git-Tag: next-20110830~54^2~20
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c8582ad95bcbdf46f799d310d7dfee73d941c2f4;p=karo-tx-linux.git

[SCSI] qla2xxx: Prevent CPU lockups when "ql2xdontresethba" module param is set.

Driver is not releasing the lock if ql2xdontresethba is set, this might lead
to a lockup.

Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
index b03c86b7a989..fe9db224794d 100644
--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -3761,10 +3761,15 @@ qla82xx_device_state_handler(scsi_qla_host_t *vha)
 			qla82xx_idc_lock(ha);
 			break;
 		case QLA82XX_DEV_NEED_RESET:
-		    if (!ql2xdontresethba)
-			qla82xx_need_reset_handler(vha);
+			if (!ql2xdontresethba)
+				qla82xx_need_reset_handler(vha);
+			else {
+				qla82xx_idc_unlock(ha);
+				msleep(1000);
+				qla82xx_idc_lock(ha);
+			}
 			dev_init_timeout = jiffies +
-				(ha->nx_dev_init_timeout * HZ);
+			    (ha->nx_dev_init_timeout * HZ);
 			break;
 		case QLA82XX_DEV_NEED_QUIESCENT:
 			qla82xx_need_qsnt_handler(vha);