From 55d356bd98262b503988ddd102b2277e32260751 Mon Sep 17 00:00:00 2001
From: Marcus Overhagen <marcusoverhagen@gmail.com>
Date: Sat, 29 Sep 2007 12:14:45 +0000
Subject: [PATCH] check for device presence before executing commands

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22367 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp b/src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp
index c5e364ed4a..937074a71a 100644
--- a/src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp
+++ b/src/add-ons/kernel/busses/scsi/ahci/ahci_port.cpp
@@ -669,6 +669,13 @@ AHCIPort::ScsiExecuteRequest(scsi_ccb *request)
 		gSCSI->finished(request, 1);
 		return;
 	}
+
+	if ((fRegs->ssts & 0xf) != 0x3) {
+		TRACE("no such device!\n");
+		request->subsys_status = SCSI_DEV_NOT_THERE;
+		gSCSI->finished(request, 1);
+		return;
+	}
 	
 	request->subsys_status = SCSI_REQ_CMP;