xen/drivers/passthrough/vtd/quirks.c: let custom parameter parsing routines return...

Modify the custom parameter parsing routines in:

xen/drivers/passthrough/vtd/quirks.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: Kevin Tian <kevin.tian@intel.com>

diff --git a/xen/drivers/passthrough/vtd/quirks.c b/xen/drivers/passthrough/vtd/quirks.c
index d6dd671dbf96451a6bbf5fe3a5f488eb8f87d8f3..d6db8626786a6991a1d267d8951a04d36dcf0c87 100644 (file)
--- a/xen/drivers/passthrough/vtd/quirks.c
+++ b/xen/drivers/passthrough/vtd/quirks.c
@@ -247,9 +247,10 @@ void vtd_ops_postamble_quirk(struct iommu* iommu)
     }
 }
 
-static void __init parse_snb_timeout(const char *s)
+static int __init parse_snb_timeout(const char *s)
 {
     int t;
+    const char *q = NULL;
 
     t = parse_bool(s, NULL);
     if ( t < 0 )
@@ -259,13 +260,13 @@ static void __init parse_snb_timeout(const char *s)
         else if ( strcmp(s, "cap") == 0 )
             t = SNB_IGD_TIMEOUT;
         else
-            t = strtoul(s, NULL, 0);
+            t = strtoul(s, &q, 0);
     }
     else
         t = t ? SNB_IGD_TIMEOUT_LEGACY : 0;
     snb_igd_timeout = MILLISECS(t);
 
-    return;
+    return (q && *q) ? -EINVAL : 0;
 }
 custom_param("snb_igd_quirk", parse_snb_timeout);