[Xen-changelog] [xen-unstable] vtd: Add checking on return value of init_vtd_hw()

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1218617775 -3600
# Node ID 29e994c7678ef704b120cb87d7d12949498120a7
# Parent  2c63cf7b042d73be0bf7b34a544f75bf648cee8b
vtd: Add checking on return value of init_vtd_hw()

This ensures correct actions will be taken if init_vtd_hw()
fails. Especially, when 'iommu=force' is used, Xen should not
boot if init_vtd_hw() fails.

Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
---
 xen/drivers/passthrough/vtd/iommu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -r 2c63cf7b042d -r 29e994c7678e xen/drivers/passthrough/vtd/iommu.c
--- a/xen/drivers/passthrough/vtd/iommu.c       Tue Aug 12 10:23:34 2008 +0100
+++ b/xen/drivers/passthrough/vtd/iommu.c       Wed Aug 13 09:56:15 2008 +0100
@@ -1789,7 +1789,8 @@ int intel_vtd_setup(void)
     memset(domid_bitmap, 0, domid_bitmap_size / 8);
     set_bit(0, domid_bitmap);
 
-    init_vtd_hw();
+    if ( init_vtd_hw() )
+        goto error;
 
     register_keyhandler('V', dump_iommu_info, "dump iommu info");
 

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