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TTY: switch tty_flip_buffer_push

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Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty in many
call sites. Only tty_port will needed and hence no more
tty_port_tty_get in those paths.

Now, the one where most of tty_port_tty_get gets removed:
tty_flip_buffer_push.

IOW we also closed all the races in drivers not using tty_port_tty_get
at all yet.

Also we move tty_flip_buffer_push declaration from include/linux/tty.h
to include/linux/tty_flip.h to all others while we are changing it
anyway.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby
2013-01-03 15:53:06 +01:00
committed by Greg Kroah-Hartman
parent d6c53c0e9b
commit 2e124b4a39
146 changed files with 446 additions and 988 deletions
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17
drivers/usb/serial/usb_wwan.c
View File

@ -275,7 +275,6 @@ static void usb_wwan_indat_callback(struct urb *urb)
int err;
int endpoint;
struct usb_serial_port *port;
struct tty_struct *tty;
struct device *dev;
unsigned char *data = urb->transfer_buffer;
int status = urb->status;
@ -288,16 +287,12 @@ static void usb_wwan_indat_callback(struct urb *urb)
dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
__func__, status, endpoint);
} else {
tty = tty_port_tty_get(&port->port);
if (tty) {
if (urb->actual_length) {
tty_insert_flip_string(&port->port, data,
urb->actual_length);
tty_flip_buffer_push(tty);
} else
dev_dbg(dev, "%s: empty read urb received\n", __func__);
tty_kref_put(tty);
}
if (urb->actual_length) {
tty_insert_flip_string(&port->port, data,
urb->actual_length);
tty_flip_buffer_push(&port->port);
} else
dev_dbg(dev, "%s: empty read urb received\n", __func__);
/* Resubmit urb so we continue receiving */
err = usb_submit_urb(urb, GFP_ATOMIC);