xen/common/core_parking.c: let custom parameter parsing routines return errno

Modify the custom parameter parsing routines in:

xen/common/core_parking.c

to indicate whether the parameter value was parsed successfully.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/common/core_parking.c b/xen/common/core_parking.c
index de269e06c21113ebc2f580143b504600d8c638c9..803c6c791192967acfdc998f9f9b0f899bb4b582 100644 (file)
--- a/xen/common/core_parking.c
+++ b/xen/common/core_parking.c
@@ -41,14 +41,16 @@ static enum core_parking_controller {
     PERFORMANCE_FIRST
 } core_parking_controller = POWER_FIRST;
 
-static void __init setup_core_parking_option(char *str)
+static int __init setup_core_parking_option(const char *str)
 {
     if ( !strcmp(str, "power") )
         core_parking_controller = POWER_FIRST;
     else if ( !strcmp(str, "performance") )
         core_parking_controller = PERFORMANCE_FIRST;
     else
-        return;
+        return -EINVAL;
+
+    return 0;
 }
 custom_param("core_parking", setup_core_parking_option);