[xen staging] libxc: Report EINVAL in invalid xc_resource_op use

[patchbot@xxxxxxx]

commit 9ccbd902df66bc44c0b442137f51d5a51b9349fd
Author:     Teddy Astie <teddy.astie@xxxxxxxxxx>
AuthorDate: Thu Apr 2 08:49:17 2026 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Apr 2 08:49:17 2026 +0200

    libxc: Report EINVAL in invalid xc_resource_op use
    
    xc_report_op doesn't update errno when called with 0 operations
    (even though it returns -1).
    
    Signed-off-by: Teddy Astie <teddy.astie@xxxxxxxxxx>
    Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libs/ctrl/xc_resource.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/libs/ctrl/xc_resource.c b/tools/libs/ctrl/xc_resource.c
index cb6a97202b..f65127f91c 100644
--- a/tools/libs/ctrl/xc_resource.c
+++ b/tools/libs/ctrl/xc_resource.c
@@ -137,6 +137,7 @@ int xc_resource_op(xc_interface *xch, uint32_t nr_ops, 
xc_resource_op_t *ops)
     if ( nr_ops > 1 )
         return xc_resource_op_multi(xch, nr_ops, ops);
 
+    errno = EINVAL;
     return -1;
 }
 
--
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