From d4f9e806c20607cafe7bb0d9eba14ccb160390a1 Mon Sep 17 00:00:00 2001
From: James Harper <james@ejbdigital.com.au>
Date: Thu, 30 Oct 2014 10:08:28 +0000
Subject: fix off-by-one error in pci_piix3_xen_ide_unplug

Fix off-by-one error when unplugging disks, which would otherwise leave the last ATA disk plugged, with obvious consequences. Also rewrite loop to be more readable.

Signed-off-by: James Harper <james.harper@ejbdigital.com.au>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
 hw/ide/piix.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index 574b9c164b..b0172fbf59 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -171,11 +171,11 @@ int pci_piix3_xen_ide_unplug(DeviceState *dev)
 {
     PCIIDEState *pci_ide;
     DriveInfo *di;
-    int i = 0;
+    int i;
 
     pci_ide = PCI_IDE(dev);
 
-    for (; i < 3; i++) {
+    for (i = 0; i < 4; i++) {
         di = drive_get_by_index(IF_IDE, i);
         if (di != NULL && !di->media_cd) {
             BlockBackend *blk = blk_by_legacy_dinfo(di);
-- 
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