From 7d40d7e85a25e01948bcb4dc3eda1355af318337 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?N=C3=A9meth=20M=C3=A1rton?= Date: Sun, 10 Jan 2010 15:34:24 +0100 Subject: USB serial: make USB device id constant MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The id_table field of the struct usb_device_id is constant in so it is worth to make the initialization data also constant. The semantic match that finds this kind of pattern is as follows: (http://coccinelle.lip6.fr/) // @r@ disable decl_init,const_decl_init; identifier I1, I2, x; @@ struct I1 { ... const struct I2 *x; ... }; @s@ identifier r.I1, y; identifier r.x, E; @@ struct I1 y = { .x = E, }; @c@ identifier r.I2; identifier s.E; @@ const struct I2 E[] = ... ; @depends on !c@ identifier r.I2; identifier s.E; @@ + const struct I2 E[] = ...; // Signed-off-by: Németh Márton Cc: Julia Lawall Cc: cocci@diku.dk Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/symbolserial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb/serial/symbolserial.c') diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c index b282c0f..1a76bc5 100644 --- a/drivers/usb/serial/symbolserial.c +++ b/drivers/usb/serial/symbolserial.c @@ -21,7 +21,7 @@ static int debug; -static struct usb_device_id id_table[] = { +static const struct usb_device_id id_table[] = { { USB_DEVICE(0x05e0, 0x0600) }, { }, }; -- cgit v1.1 From a108bfcb372d8c4452701039308fb95747911c59 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 18 Feb 2010 16:44:01 +0000 Subject: USB: tty: Prune uses of tty_request_room in the USB layer We have lots of callers that do not need to do this in the first place. Remove the calls as they both cost CPU and for big buffers can mess up the multi-page allocation avoidance. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/symbolserial.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) (limited to 'drivers/usb/serial/symbolserial.c') diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c index 1a76bc5..7239888 100644 --- a/drivers/usb/serial/symbolserial.c +++ b/drivers/usb/serial/symbolserial.c @@ -51,7 +51,6 @@ static void symbol_int_callback(struct urb *urb) int status = urb->status; struct tty_struct *tty; int result; - int available_room = 0; int data_length; dbg("%s - port %d", __func__, port->number); @@ -89,13 +88,8 @@ static void symbol_int_callback(struct urb *urb) */ tty = tty_port_tty_get(&port->port); if (tty) { - available_room = tty_buffer_request_room(tty, - data_length); - if (available_room) { - tty_insert_flip_string(tty, &data[1], - available_room); - tty_flip_buffer_push(tty); - } + tty_insert_flip_string(tty, &data[1], data_length); + tty_flip_buffer_push(tty); tty_kref_put(tty); } } else { -- cgit v1.1