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

[patchbot@xxxxxxx]

commit 438e96ab479495a932391a22e219ee62fa8c4f47
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Wed Apr 20 09:31:18 2022 +0200
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Apr 22 20:39:34 2022 +0100

    tools/libs/guest: don't set errno to a negative value
    
    Setting errno to a negative error value makes no sense.
    
    Fixes: cb99a64029c9 ("libxc: arm: allow passing a device tree blob to the 
guest")
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/libs/guest/xg_dom_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libs/guest/xg_dom_core.c b/tools/libs/guest/xg_dom_core.c
index c17cf9f712..c4f4e7f3e2 100644
--- a/tools/libs/guest/xg_dom_core.c
+++ b/tools/libs/guest/xg_dom_core.c
@@ -855,7 +855,7 @@ int xc_dom_devicetree_file(struct xc_dom_image *dom, const 
char *filename)
         return -1;
     return 0;
 #else
-    errno = -EINVAL;
+    errno = EINVAL;
     return -1;
 #endif
 }
--
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