From 0245e9867ccbfd51cd5857684128f93cba7701af Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Sun, 9 Sep 2012 13:15:33 +0200
Subject: [PATCH] Fix NULL deference if no ATA bus is present.

---
 sortix/ata.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sortix/ata.cpp b/sortix/ata.cpp
index 173e6698..d7ffee1d 100644
--- a/sortix/ata.cpp
+++ b/sortix/ata.cpp
@@ -75,6 +75,8 @@ namespace Sortix
 		void DetectBus(unsigned busid, uint16_t ioport, uint16_t altio)
 		{
 			ATABus* bus = ATA::CreateBus(ioport, altio);
+			if ( !bus )
+				return;
 			DetectDrive(busid, bus, 0);
 			DetectDrive(busid, bus, 1);
 		}