xen/dmop: Fix XEN_DMOP_nr_vcpus to actually return data

The const_op boolean needs clobbering to cause data to be written back to the caller. Fixes: c4441ab ("dmop: Add XEN_DMOP_nr_vcpus") Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> Release-Acked-by: Ian Jackson <iwj@xenproject.org>
xen-project · Mar 4, 2021 · 6b0ac9a · 6b0ac9a
1 parent 73b1370
commit 6b0ac9a
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diff --git a/xen/arch/arm/dm.c b/xen/arch/arm/dm.c
@@ -128,6 +128,7 @@ int dm_op(const struct dmop_args *op_args)
         struct xen_dm_op_nr_vcpus *data = &op.u.nr_vcpus;
 
         data->vcpus = d->max_vcpus;
+        const_op = false;
         rc = 0;
         break;
     }

diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c
@@ -612,6 +612,7 @@ int dm_op(const struct dmop_args *op_args)
         struct xen_dm_op_nr_vcpus *data = &op.u.nr_vcpus;
 
         data->vcpus = d->max_vcpus;
+        const_op = false;
         rc = 0;
         break;
     }