staging: dgap: tty.c: removes read_cnt, real_raw and rawreadok

This patch removes the use of read_cnt, real_raw and rawreadok.
These variables don't exist in the new API. Reading the data
raw is no longer supported by the tty layer.
Signed-off-by: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap_tty.c

@@ -774,14 +774,11 @@ void dgap_input(struct channel_t *ch)
 	DPR_READ(("dgap_input start 2\n"));
 
 	/* Decide how much data we can send into the tty layer */
-	if (dgap_rawreadok && tp->real_raw)
- 		flip_len = MYFLIPLEN;
-	else
 	flip_len = TTY_FLIPBUF_SIZE;
 
 	/* Chop down the length, if needed */
 	len = min(data_len, flip_len);
-	len = min(len, (N_TTY_BUF_SIZE - 1) - tp->read_cnt);
+	len = min(len, (N_TTY_BUF_SIZE - 1));
 
 	ld = tty_ldisc_ref(tp);
                 
@@ -863,21 +860,6 @@ void dgap_input(struct channel_t *ch)
 	 * On the other hand, if we are not raw, we need to go through
 	 * the tty layer, which has its API more well defined.
 	 */
-        if (dgap_rawreadok && tp->real_raw) {
-
-		/* !!! WE *MUST* LET GO OF ALL LOCKS BEFORE CALLING RECEIVE BUF !!! */
-		DGAP_UNLOCK(ch->ch_lock, lock_flags2);
-		DGAP_UNLOCK(bd->bd_lock, lock_flags);
-
-		DPR_READ(("dgap_input. %d real_raw len:%d calling receive_buf for buffer for board %d\n", 
-			 __LINE__, len, ch->ch_bd->boardnum));
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
-		tp->ldisc->ops->receive_buf(tp, ch->ch_bd->flipbuf, NULL, len);
-#else
-		tp->ldisc.ops->receive_buf(tp, ch->ch_bd->flipbuf, NULL, len);
-#endif
-	}
-	else {
 	if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) {
 		dgap_parity_scan(ch, ch->ch_bd->flipbuf, ch->ch_bd->flipflagbuf, &len);
 
@@ -895,7 +877,6 @@ void dgap_input(struct channel_t *ch)
 
 	/* Tell the tty layer its okay to "eat" the data now */
 	tty_flip_buffer_push(tp->port);
-	}
 
 	if (ld)
 		tty_ldisc_deref(ld);