[PATCH] drivers/isdn/*: trivial vsnprintf() conversion

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Alan Cox <alan@redhat.com>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/isdn/hisax/hisax_isac.c b/drivers/isdn/hisax/hisax_isac.c
index 81eac34..d0fefcf 100644
--- a/drivers/isdn/hisax/hisax_isac.c
+++ b/drivers/isdn/hisax/hisax_isac.c
@@ -433,7 +433,7 @@
 	char buf[256];
 	
 	va_start(args, fmt);
-	vsprintf(buf, fmt, args);
+	vsnprintf(buf, sizeof(buf), fmt, args);
 	DBG(DBG_L1M, "%s", buf);
 	va_end(args);
 }