From b73ff505c00e32c420cc4cd35d63da6e9aa7aa6e Mon Sep 17 00:00:00 2001
From: Bill Pemberton <wfp5p@virginia.edu>
Date: Thu, 25 Oct 2012 12:46:21 -0400
Subject: [PATCH] --- yaml --- r: 338379 b: refs/heads/master c:
 e3224111b3a527eb8f9b9b6deed83b727522941e h: refs/heads/master i:   338377:
 29190be618eb4d1f4dd60f67058388ccd8998a3d   338375:
 b39da69df22cdb93c46e3ff1e7944a93379a0bd2 v: v3

---
 [refs]                                    |  2 +-
 trunk/drivers/staging/dgrp/dgrp_net_ops.c | 67 +++--------------------
 2 files changed, 9 insertions(+), 60 deletions(-)

diff --git a/[refs] b/[refs]
index c5b18ef833ef..510e86ae1eb9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a1c25f2b98e10038f7d198704d033eb73bad0677
+refs/heads/master: e3224111b3a527eb8f9b9b6deed83b727522941e
diff --git a/trunk/drivers/staging/dgrp/dgrp_net_ops.c b/trunk/drivers/staging/dgrp/dgrp_net_ops.c
index ab839ea3b44c..0788357fd3ca 100644
--- a/trunk/drivers/staging/dgrp/dgrp_net_ops.c
+++ b/trunk/drivers/staging/dgrp/dgrp_net_ops.c
@@ -151,20 +151,15 @@ static void dgrp_read_data_block(struct ch_struct *ch, u8 *flipbuf,
  * Copys the rbuf to the flipbuf and sends to line discipline.
  * Sends input buffer data to the line discipline.
  *
- * There are several modes to consider here:
- *    rawreadok, tty->real_raw, and IF_PARMRK
  */
 static void dgrp_input(struct ch_struct *ch)
 {
 	struct nd_struct *nd;
 	struct tty_struct *tty;
-	int remain;
 	int data_len;
 	int len;
-	int flip_len;
 	int tty_count;
 	ulong lock_flags;
-	struct tty_ldisc *ld;
 	u8  *myflipbuf;
 	u8  *myflipflagbuf;
 
@@ -212,37 +207,11 @@ static void dgrp_input(struct ch_struct *ch)
 
 	spin_unlock_irqrestore(&nd->nd_lock, lock_flags);
 
-	/* Decide how much data we can send into the tty layer */
-	if (dgrp_rawreadok && tty->real_raw)
-		flip_len = MYFLIPLEN;
-	else
-		flip_len = TTY_FLIPBUF_SIZE;
-
 	/* data_len should be the number of chars that we read in */
 	data_len = (ch->ch_rin - ch->ch_rout) & RBUF_MASK;
-	remain = data_len;
 
 	/* len is the amount of data we are going to transfer here */
-	len = min(data_len, flip_len);
-
-	/* take into consideration length of ldisc */
-	len = min(len, (N_TTY_BUF_SIZE - 1) - tty->read_cnt);
-
-	ld = tty_ldisc_ref(tty);
-
-	/*
-	 * If we were unable to get a reference to the ld,
-	 * don't flush our buffer, and act like the ld doesn't
-	 * have any space to put the data right now.
-	 */
-	if (!ld) {
-		len = 0;
-	} else if (!ld->ops->receive_buf) {
-		spin_lock_irqsave(&nd->nd_lock, lock_flags);
-		ch->ch_rout = ch->ch_rin;
-		spin_unlock_irqrestore(&nd->nd_lock, lock_flags);
-		len = 0;
-	}
+	len = tty_buffer_request_room(tty, data_len);
 
 	/* Check DPA flow control */
 	if ((nd->nd_dpa_debug) &&
@@ -254,42 +223,22 @@ static void dgrp_input(struct ch_struct *ch)
 
 		dgrp_read_data_block(ch, myflipbuf, len);
 
-		/*
-		 * In high performance mode, we don't have to update
-		 * flag_buf or any of the counts or pointers into flip buf.
-		 */
-		if (!dgrp_rawreadok || !tty->real_raw) {
-			if (I_PARMRK(tty) || I_BRKINT(tty) || I_INPCK(tty))
-				parity_scan(ch, myflipbuf, myflipflagbuf, &len);
-			else
-				memset(myflipflagbuf, TTY_NORMAL, len);
-		}
+		if (I_PARMRK(tty) || I_BRKINT(tty) || I_INPCK(tty))
+			parity_scan(ch, myflipbuf, myflipflagbuf, &len);
+		else
+			memset(myflipflagbuf, TTY_NORMAL, len);
 
 		if ((nd->nd_dpa_debug) &&
 		    (nd->nd_dpa_port == PORT_NUM(MINOR(tty_devnum(tty)))))
 			dgrp_dpa_data(nd, 1, myflipbuf, len);
 
-		/*
-		 * If we're doing raw reads, jam it right into the
-		 * line disc bypassing the flip buffers.
-		 */
-		if (dgrp_rawreadok && tty->real_raw)
-			ld->ops->receive_buf(tty, myflipbuf, NULL, len);
-		else {
-			len = tty_buffer_request_room(tty, len);
-			tty_insert_flip_string_flags(tty, myflipbuf,
-						     myflipflagbuf, len);
-
-			/* Tell the tty layer its okay to "eat" the data now */
-			tty_flip_buffer_push(tty);
-		}
+		tty_insert_flip_string_flags(tty, myflipbuf,
+					     myflipflagbuf, len);
+		tty_flip_buffer_push(tty);
 
 		ch->ch_rxcount += len;
 	}
 
-	if (ld)
-		tty_ldisc_deref(ld);
-
 	/*
 	 * Wake up any sleepers (maybe dgrp close) that might be waiting
 	 * for a channel flag state change.