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[3/3] gigaset: prune use of tty_buffer_request_room

Message ID 3ba816ff92f2dad24a5265f8f213a63debe9c6e6.1268580322.git.tilman@imap.cc
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Tilman Schmidt March 14, 2010, 10:58 p.m. UTC 
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>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>, stable@kernel.org
---
Note to -stable: applies correctly to 2.6.33 with fuzz 2.

 drivers/isdn/gigaset/interface.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
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Patch

diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index a1bcbc2..f0dc6c9 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -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);
 	}