From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Mon, 9 Apr 2007 15:52:31 +0000 (-0400)
Subject: SCSI: use the proper semaphore to protect the class lists
X-Git-Tag: v2.6.22-rc1~1119^2~25
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7bb125dc3d0ca3f72c9116525ce0f018a9844e1;p=linux-2.6

SCSI: use the proper semaphore to protect the class lists

SCSI was using the incorrect lock to protect walking the list of all
devices in the class.  This patch fixes this.

Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 38c3a291ef..bd8e7f323c 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -435,7 +435,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
 	struct class_device *cdev;
 	struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p;
 
-	down_read(&class->subsys.rwsem);
+	down(&class->sem);
 	list_for_each_entry(cdev, &class->children, node) {
 		p = class_to_shost(cdev);
 		if (p->host_no == hostnum) {
@@ -443,7 +443,7 @@ struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
 			break;
 		}
 	}
-	up_read(&class->subsys.rwsem);
+	up(&class->sem);
 
 	return shost;
 }