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Commit fbf94773 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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USB: omninet: switch to generic read implementation 



Switch to the more efficient generic read implementation.

Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a6c042f9

drivers/usb/serial/omninet.c

+3 −40
Original line number Diff line number Diff line
@@ -33,8 +33,7 @@ 


/* function prototypes */

static int  omninet_open(struct tty_struct *tty, struct usb_serial_port *port);

static void omninet_close(struct usb_serial_port *port);

static void omninet_read_bulk_callback(struct urb *urb);

static void omninet_process_read_urb(struct urb *urb);

static void omninet_write_bulk_callback(struct urb *urb);

static int  omninet_write(struct tty_struct *tty, struct usb_serial_port *port,

				const unsigned char *buf, int count);
@@ -61,11 +60,10 @@ static struct usb_serial_driver zyxel_omninet_device = { 
	.port_probe =		omninet_port_probe,

	.port_remove =		omninet_port_remove,

	.open =			omninet_open,

	.close =		omninet_close,

	.write =		omninet_write,

	.write_room =		omninet_write_room,

	.read_bulk_callback =	omninet_read_bulk_callback,

	.write_bulk_callback =	omninet_write_bulk_callback,

	.process_read_urb =	omninet_process_read_urb,

	.disconnect =		omninet_disconnect,

};
@@ -134,26 +132,13 @@ static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port) 
{

	struct usb_serial	*serial = port->serial;

	struct usb_serial_port	*wport;

	int			result = 0;



	wport = serial->port[1];

	tty_port_tty_set(&wport->port, tty);



	/* Start reading from the device */

	result = usb_submit_urb(port->read_urb, GFP_KERNEL);

	if (result)

		dev_err(&port->dev,

			"%s - failed submitting read urb, error %d\n",

			__func__, result);

	return result;

}



static void omninet_close(struct usb_serial_port *port)

{

	usb_kill_urb(port->read_urb);

	return usb_serial_generic_open(tty, port);

}





#define OMNINET_HEADERLEN	4

#define OMNINET_BULKOUTSIZE	64

#define OMNINET_PAYLOADSIZE	(OMNINET_BULKOUTSIZE - OMNINET_HEADERLEN)
@@ -175,28 +160,6 @@ static void omninet_process_read_urb(struct urb *urb) 
	tty_flip_buffer_push(&port->port);

}



static void omninet_read_bulk_callback(struct urb *urb)

{

	struct usb_serial_port 	*port 	= urb->context;

	int status = urb->status;

	int result;



	if (status) {

		dev_dbg(&port->dev, "%s - nonzero read bulk status received: %d\n",

			__func__, status);

		return;

	}



	omninet_process_read_urb(urb);



	/* Continue trying to always read  */

	result = usb_submit_urb(urb, GFP_ATOMIC);

	if (result)

		dev_err(&port->dev,

			"%s - failed resubmitting read urb, error %d\n",

			__func__, result);

}



static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,

					const unsigned char *buf, int count)

{