[PATCH v4 2/3] x86/hvm: check return code of hvm_pi_update_irte when binding

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

Consume the return code from hvm_pi_update_irte(), and propagate the error
back to the caller if hvm_pi_update_irte() fails.

Fixes: 35a1caf8b6b5 ('pass-through: update IRTE according to guest interrupt 
config changes')
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Changes since v3:
 - New in this version.
---
 xen/drivers/passthrough/x86/hvm.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/xen/drivers/passthrough/x86/hvm.c 
b/xen/drivers/passthrough/x86/hvm.c
index f5faff7a499a..47de6953fdf8 100644
--- a/xen/drivers/passthrough/x86/hvm.c
+++ b/xen/drivers/passthrough/x86/hvm.c
@@ -381,7 +381,15 @@ int pt_irq_create_bind(
 
         /* Use interrupt posting if it is supported. */
         if ( iommu_intpost )
-            hvm_pi_update_irte(vcpu, info, pirq_dpci->gmsi.gvec);
+        {
+            rc = hvm_pi_update_irte(vcpu, info, pirq_dpci->gmsi.gvec);
+
+            if ( rc )
+            {
+                pt_irq_destroy_bind(d, pt_irq_bind);
+                return rc;
+            }
+        }
 
         if ( pt_irq_bind->u.msi.gflags & XEN_DOMCTL_VMSI_X86_UNMASKED )
         {
-- 
2.48.1