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authorAlan Cox <alan@redhat.com>2008-10-13 10:39:46 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 09:51:41 -0700
commit4a90f09b20f4622dcbff1f0e1e6bae1704f8ad8c (patch)
tree9b275f88f2705cb10121d5982741aef3a088a7c8 /drivers/usb/serial/ipw.c
parent95f9bfc6b76e862265a2d70ae061eec18fe14140 (diff)
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tty: usb-serial krefs
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>
Diffstat (limited to 'drivers/usb/serial/ipw.c')
-rw-r--r--drivers/usb/serial/ipw.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
index a842025b9b57..480cac27d646 100644
--- a/drivers/usb/serial/ipw.c
+++ b/drivers/usb/serial/ipw.c
@@ -170,12 +170,13 @@ static void ipw_read_bulk_callback(struct urb *urb)
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 && urb->actual_length) {
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
}
+ tty_kref_put(tty);
/* Continue trying to always read */
usb_fill_bulk_urb(port->read_urb, port->serial->dev,