From 53926274f24e5c852dbe8f89dea16b7822549472 Mon Sep 17 00:00:00 2001
From: Mark Haverkamp <markh@osdl.org>
Date: Mon, 27 Mar 2006 09:44:19 -0800
Subject: [SCSI] aacraid: Fix extra unregister_chrdev

Received from Mark Salyzyn

If there are no aacraid controllers, we do not create the raid
controller chrdev, thus when the driver is unloaded it performs a
superfluous deregistration.

Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index fbd4f55..9437a4c 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1023,7 +1023,8 @@ static int __init aac_init(void)
 
 static void __exit aac_exit(void)
 {
-	unregister_chrdev(aac_cfg_major, "aac");
+	if (aac_cfg_major > -1)
+		unregister_chrdev(aac_cfg_major, "aac");
 	pci_unregister_driver(&aac_pci_driver);
 }
 
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