SCSI: use the proper semaphore to protect the class lists
authorGreg Kroah-Hartman <gregkh@suse.de>
Mon, 9 Apr 2007 15:52:31 +0000 (11:52 -0400)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 27 Apr 2007 17:57:30 +0000 (10:57 -0700)
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>
drivers/scsi/hosts.c

index 38c3a291efacd532cfdba99d7e7c291fc8de0395..bd8e7f323c69fcd607ba6124f7a83339809a8abd 100644 (file)
@@ -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;
 }