[PATCH 1 of 3] Made arch_memory_op propagate (instead of ignore) errors from guest_physmap_add_page

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

# HG changeset patch
# User konrad@phenom.dumpdata.com
# Date 1259769438 18000
# Node ID f9eeb0545e1c48cd9fc090c3be8d994b258dd636
# Parent  50aaf5df87ff75fbffffdc7cf9e6d128adef8ecb
Made arch_memory_op propagate (instead of ignore) errors from guest_physmap_add_page.

Authored-by: David Lively
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff -r 50aaf5df87ff -r f9eeb0545e1c xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c	Wed Dec 02 10:35:41 2009 -0500
+++ b/xen/arch/x86/mm.c	Wed Dec 02 10:57:18 2009 -0500
@@ -4005,6 +4005,7 @@
         struct xen_add_to_physmap xatp;
         unsigned long prev_mfn, mfn = 0, gpfn;
         struct domain *d;
+        int rc = 0;
 
         if ( copy_from_guest(&xatp, arg, 1) )
             return -EFAULT;
@@ -4089,7 +4090,7 @@
             guest_physmap_remove_page(d, gpfn, mfn, 0);
 
         /* Map at new location. */
-        guest_physmap_add_page(d, xatp.gpfn, mfn, 0);
+        rc = guest_physmap_add_page(d, xatp.gpfn, mfn, 0);
 
         domain_unlock(d);
 
@@ -4098,7 +4099,7 @@
 
         rcu_unlock_domain(d);
 
-        break;
+        return rc;
     }
 
     case XENMEM_set_memory_map: