scsi: use class iteration api

Convert to use the class iteration api.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 24271a8..6325115 100644 (file)
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -429,6 +429,15 @@ void scsi_unregister(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(scsi_unregister);
 
+static int __scsi_host_match(struct class_device *cdev, void *data)
+{
+       struct Scsi_Host *p;
+       unsigned short *hostnum = (unsigned short *)data;
+
+       p = class_to_shost(cdev);
+       return p->host_no == *hostnum;
+}
+
 /**
  * scsi_host_lookup - get a reference to a Scsi_Host by host no
  *
@@ -439,19 +448,12 @@ EXPORT_SYMBOL(scsi_unregister);
  **/
 struct Scsi_Host *scsi_host_lookup(unsigned short hostnum)
 {
-       struct class *class = &shost_class;
        struct class_device *cdev;
-       struct Scsi_Host *shost = ERR_PTR(-ENXIO), *p;
+       struct Scsi_Host *shost = ERR_PTR(-ENXIO);
 
-       down(&class->sem);
-       list_for_each_entry(cdev, &class->children, node) {
-               p = class_to_shost(cdev);
-               if (p->host_no == hostnum) {
-                       shost = scsi_host_get(p);
-                       break;
-               }
-       }
-       up(&class->sem);
+       cdev = class_find_child(&shost_class, &hostnum, __scsi_host_match);
+       if (cdev)
+               shost = scsi_host_get(class_to_shost(cdev));
 
        return shost;
 }