[xen staging] tools/libs/ctrl: don't set errno to a negative value

[patchbot@xxxxxxx]

commit a0fb7e0e73483ed042d5ca34861a891a51ad337b
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Wed Apr 20 09:31:17 2022 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Apr 22 20:39:34 2022 +0100

    tools/libs/ctrl: don't set errno to a negative value
    
    The claimed reason for setting errno to -1 is wrong. On x86
    xc_domain_pod_target() will set errno to a sane value in the error
    case.
    
    Fixes: ff1745d5882b ("tools: libxl: do not set the PoD target on ARM")
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libs/ctrl/xc_domain.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/libs/ctrl/xc_domain.c b/tools/libs/ctrl/xc_domain.c
index ef62f66009..71608c00e9 100644
--- a/tools/libs/ctrl/xc_domain.c
+++ b/tools/libs/ctrl/xc_domain.c
@@ -1293,9 +1293,7 @@ int xc_domain_get_pod_target(xc_interface *xch,
                              uint64_t *pod_cache_pages,
                              uint64_t *pod_entries)
 {
-    /* On x86 (above) xc_domain_pod_target will incorrectly return -1
-     * with errno==-1 on error. Do the same for least surprise. */
-    errno = -1;
+    errno = EOPNOTSUPP;
     return -1;
 }
 #endif
--
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