[Xen-changelog] [xen-unstable] VT-d: DMAR device scope parse fixup

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1207901576 -3600
# Node ID 1ce8b4e51911376aed7bd906ced0e1fb27753d90
# Parent  115a1720e976a184b2c044541a99b413b2bf844e
VT-d: DMAR device scope parse fixup

Previously applied sanity check fixup is incorrect.

Signed-off-by: Espen Skoglund <espen.skoglund@xxxxxxxxxxxxx>
---
 xen/drivers/passthrough/vtd/dmar.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -r 115a1720e976 -r 1ce8b4e51911 xen/drivers/passthrough/vtd/dmar.c
--- a/xen/drivers/passthrough/vtd/dmar.c        Fri Apr 11 09:10:58 2008 +0100
+++ b/xen/drivers/passthrough/vtd/dmar.c        Fri Apr 11 09:12:56 2008 +0100
@@ -231,7 +231,7 @@ static int scope_device_count(void *star
         bus = scope->start_bus;
         depth = (scope->length - sizeof(struct acpi_dev_scope))
                    / sizeof(struct acpi_pci_path);
-        while ( --depth >= 0 )
+        while ( --depth > 0 )
         {
             bus = read_pci_config_byte(
                 bus, path->dev, path->fn, PCI_SECONDARY_BUS);
@@ -353,7 +353,7 @@ static int __init acpi_parse_dev_scope(
                    / sizeof(struct acpi_pci_path);
         bus = scope->start_bus;
 
-        while ( --depth >= 0 )
+        while ( --depth > 0 )
         {
             bus = read_pci_config_byte(
                 bus, path->dev, path->fn, PCI_SECONDARY_BUS);

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