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tty: usb-serial krefs

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Use kref in the USB serial drivers so that we don't free tty structures
from under the URB receive handlers as has historically been the case if
you were unlucky. This also gives us a framework for general tty drivers to
use tty_port objects and refcount.

Contains two err->dev_err changes merged together to fix clashes in the
-next tree.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-13 10:39:46 +01:00 • committed by Linus Torvalds
parent 95f9bfc6b7
commit 4a90f09b20
37 changed files with 313 additions and 208 deletions
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3
drivers/usb/serial/ir-usb.c
View file

@ -465,11 +465,12 @@ static void ir_read_bulk_callback(struct urb *urb)
ir_baud = *data & 0x0f;
usb_serial_debug_data(debug, &port->dev, __func__,
urb->actual_length, data);
tty = port->port.tty;
tty = tty_port_tty_get(&port->port);
if (tty_buffer_request_room(tty, urb->actual_length - 1)) {
tty_insert_flip_string(tty, data+1, urb->actual_length - 1);
tty_flip_buffer_push(tty);
}
tty_kref_put(tty);
/*
* No break here.