drivers: isdn: use kernel macros to convert hex digit

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Tilman Schmidt <tilman@imap.cc>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 11 deletions

diff --git a/drivers/isdn/hisax/q931.c b/drivers/isdn/hisax/q931.c
index 8b853d58e820..c0771f98fa11 100644
--- a/drivers/isdn/hisax/q931.c
+++ b/drivers/isdn/hisax/q931.c
@@ -1152,20 +1152,11 @@ QuickHex(char *txt, u_char * p, int cnt)
 {
         register int i;
         register char *t = txt;
-        register u_char w;
 
         for (i = 0; i < cnt; i++) {
                 *t++ = ' ';
-                w = (p[i] >> 4) & 0x0f;
-                if (w < 10)
-                        *t++ = '0' + w;
-                else
-                        *t++ = 'A' - 10 + w;
-                w = p[i] & 0x0f;
-                if (w < 10)
-                        *t++ = '0' + w;
-                else
-                        *t++ = 'A' - 10 + w;
+                *t++ = hex_asc_hi(p[i]);
+                *t++ = hex_asc_lo(p[i]);
         }
         *t++ = 0;
         return (t - txt);