isdn: clean up debug format string usage

Avoid unneeded local string buffers for constructing debug output.  Also
cleans up debug calls that contain a single parameter so that they cannot
be accidentally parsed as format strings.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hisax/hfc_pci.c b/drivers/isdn/hisax/hfc_pci.c
index 3ccd724..497bd02 100644
--- a/drivers/isdn/hisax/hfc_pci.c
+++ b/drivers/isdn/hisax/hfc_pci.c
@@ -901,7 +901,7 @@
 					ptr--;
 					*ptr++ = '\n';
 					*ptr = 0;
-					HiSax_putstatus(cs, NULL, cs->dlog);
+					HiSax_putstatus(cs, NULL, "%s", cs->dlog);
 				} else
 					HiSax_putstatus(cs, "LogEcho: ", "warning Frame too big (%d)", total - 3);
 			}