tty: Fix up char drivers request_room usage

We can't change them all but quite a few misuse it.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 1 insertions, 6 deletions

diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 584910f..a3f32a1 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -853,8 +853,6 @@ static int receive_data(enum port_type index, struct nozomi *dc)
 		goto put;
 	}
 
-	tty_buffer_request_room(tty, size);
-
 	while (size > 0) {
 		read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
 
diff --git a/drivers/char/serial167.c b/drivers/char/serial167.c
index 452370a..986aa60 100644
--- a/drivers/char/serial167.c
+++ b/drivers/char/serial167.c
@@ -658,8 +658,7 @@ static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id)
 			info->mon.char_max = char_count;
 		info->mon.char_last = char_count;
 #endif
-		len = tty_buffer_request_room(tty, char_count);
-		while (len--) {
+		while (char_count--) {
 			data = base_addr[CyRDR];
 			tty_insert_flip_char(tty, data, TTY_NORMAL);
 #ifdef CYCLOM_16Y_HACK
diff --git a/drivers/char/specialix.c b/drivers/char/specialix.c
index 268e17f..07ac14d 100644
--- a/drivers/char/specialix.c
+++ b/drivers/char/specialix.c
@@ -646,8 +646,6 @@ static void sx_receive(struct specialix_board *bp)
 	dprintk(SX_DEBUG_RX, "port: %p: count: %d\n", port, count);
 	port->hits[count > 8 ? 9 : count]++;
 
-	tty_buffer_request_room(tty, count);
-
 	while (count--)
 		tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL);
 	tty_flip_buffer_push(tty);