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 584910ff725e..a3f32a15fde4 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 452370af95de..986aa606a6b6 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 268e17f9ec3f..07ac14d949ce 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);