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gigaset: prune use of tty_buffer_request_room 

Calling tty_buffer_request_room() before tty_insert_flip_string()
is unnecessary, costs CPU and for big buffers can mess up the
multi-page allocation avoidance.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Acked-by: Karsten Keil <keil@b1-systems.de>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>, stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tilman Schmidt 2010-03-14 12:58:05 +00:00 committed by David S. Miller
parent 3a0a3a6b92
commit 873a69a358
1 changed files with 0 additions and 1 deletions
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drivers/isdn/gigaset/interface.c
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@ -628,7 +628,6 @@ void gigaset_if_receive(struct cardstate *cs,
if (tty == NULL)
gig_dbg(DEBUG_IF, "receive on closed device");
else {
tty_buffer_request_room(tty, len);
tty_insert_flip_string(tty, buffer, len);
tty_flip_buffer_push(tty);
}