[xen stable-4.13] x86/dmop: Properly fail for PV guests

[patchbot@xxxxxxx]

commit 24b181e4e4c6c6fe28217c845d6d753da1606aeb
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Mar 5 15:49:32 2021 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Mar 5 15:49:32 2021 +0100

    x86/dmop: Properly fail for PV guests
    
    The current code has an early exit for PV guests, but it returns 0 having 
done
    nothing.
    
    Fixes: 524a98c2ac5 ("public / x86: introduce __HYPERCALL_dm_op...")
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    master commit: 615367b5275a5b0123f1f1ee86c985fab234a5a4
    master date: 2021-02-26 12:28:52 +0000
---
 xen/arch/x86/hvm/dm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c
index d6d0e8be89..c387a1e49e 100644
--- a/xen/arch/x86/hvm/dm.c
+++ b/xen/arch/x86/hvm/dm.c
@@ -368,6 +368,7 @@ static int dm_op(const struct dmop_args *op_args)
     if ( rc )
         return rc;
 
+    rc = -EINVAL;
     if ( !is_hvm_domain(d) )
         goto out;
 
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.13