diff --git a/drivers/staging/otus/apdbg.c b/drivers/staging/otus/apdbg.c
index 32c26e59baf7..09415a6b93ca 100644
--- a/drivers/staging/otus/apdbg.c
+++ b/drivers/staging/otus/apdbg.c
@@ -90,28 +90,6 @@ struct zdap_ioctl {
 
 #endif
 
-static char hex(char v)
-{
-	if (isdigit(v))
-		return v - '0';
-	else if (isxdigit(v))
-		return tolower(v) - 'a' + 10;
-	else
-		return 0;
-}
-
-static unsigned char asctohex(char *str)
-{
-	unsigned char value;
-
-	value = hex(*str) & 0x0f;
-	value = value << 4;
-	str++;
-	value |= hex(*str) & 0x0f;
-
-	return value;
-}
-
 char *prgname;
 
 int set_ioctl(int sock, struct ifreq *req)