[xen stable-4.19] x86/hvm: check return code of hvm_pi_update_irte when binding

[patchbot@xxxxxxx]

commit 5e816eb950600a0f7c31f031a8f44c385f8c6b76
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Thu Mar 20 13:19:36 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Mar 20 13:19:36 2025 +0100

    x86/hvm: check return code of hvm_pi_update_irte when binding
    
    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>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: cb587f620ab56cc683347d8120ba63989fad2693
    master date: 2025-03-12 13:32:31 +0100
---
 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 f5faff7a49..47de6953fd 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 )
         {
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.19