[Xen-devel] [PATCH v2 05/52] xen/arch/x86/cpu/mcheck/mce.c: let custom parameter parsing routines return errno

[Juergen Gross <jgross@xxxxxxxx>]

Modify the custom parameter parsing routines in:

xen/arch/x86/cpu/mcheck/mce.c

to indicate whether the parameter value was parsed successfully.

Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/cpu/mcheck/mce.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c
index 30525dd78b..e577a9db11 100644
--- a/xen/arch/x86/cpu/mcheck/mce.c
+++ b/xen/arch/x86/cpu/mcheck/mce.c
@@ -62,13 +62,18 @@ struct mca_banks *mca_allbanks;
 #endif
 
 int mce_verbosity;
-static void __init mce_set_verbosity(char *str)
+static int __init mce_set_verbosity(char *str)
 {
     if (strcmp("verbose", str) == 0)
         mce_verbosity = MCE_VERBOSE;
     else
+    {
         printk(KERN_DEBUG "Machine Check verbosity level %s not recognised"
                "use mce_verbosity=verbose", str);
+        return -EINVAL;
+    }
+
+    return 0;
 }
 custom_param("mce_verbosity", mce_set_verbosity);
 
-- 
2.12.3


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