[PATCH] class_simple cleanup in sg

[Chris Wright]

The only spot that seems to care about class_simple_device_add possibly
failing, but it gets the wrong error test.

===== drivers/scsi/sg.c 1.81 vs edited =====
--- 1.81/drivers/scsi/sg.c	Fri Feb  6 00:21:23 2004
+++ edited/drivers/scsi/sg.c	Wed Mar  3 19:56:13 2004
@@ -1439,7 +1439,7 @@
 				MKDEV(SCSI_GENERIC_MAJOR, k), 
 				cl_dev->dev, "%s", 
 				disk->disk_name);
-		if (NULL == sg_class_member)
+		if (IS_ERR(sg_class_member))
 			printk(KERN_WARNING "sg_add: "
 				"class_simple_device_add failed\n");
 		class_set_devdata(sg_class_member, sdp);
-
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