[pschweitzer] 58711: [KS] Check parameters before using them and not after

Author: pschweitzer
Date: Sun Apr  7 11:35:50 2013
New Revision: 58711

URL: http://svn.reactos.org/svn/reactos?rev=58711&view=rev
Log:
[KS]
Check parameters before using them and not after

Modified:
    trunk/reactos/drivers/ksfilter/ks/event.c

Modified: trunk/reactos/drivers/ksfilter/ks/event.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/ksfilter/ks/event.c...
==============================================================================
--- trunk/reactos/drivers/ksfilter/ks/event.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/ksfilter/ks/event.c [iso-8859-1] Sun Apr  7 11:35:50 2013
@@ -421,17 +421,17 @@
     PKSEVENT_ENTRY EventEntry;
     PLIST_ENTRY Entry;

+    if (!Ctx || !Ctx->List || !Ctx->FileObject || !Ctx->Irp)
+    {
+        /* invalid parameter */
+        return FALSE;
+    }
+
     /* get current irp stack location */
     IoStack = IoGetCurrentIrpStackLocation(Ctx->Irp);

/* get event data */
     EventData = (PKSEVENTDATA)IoStack->Parameters.DeviceIoControl.Type3InputBuffer;
-
-    if (!Ctx || !Ctx->List || !Ctx->FileObject || !Ctx->Irp)
-    {
-        /* invalid parameter */
-        return FALSE;
-    }

/* point to first entry */
     Entry = Ctx->List->Flink;