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Commit 461d696a authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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USB: serial: pl2303: clean up urb->status usage 



This done in anticipation of removal of urb->status, which will make
that patch easier to review and apply in the future.


Cc: <linux-usb-devel@lists.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 78c26aeb

drivers/usb/serial/pl2303.c

+22 −20
Original line number Diff line number Diff line
@@ -961,11 +961,12 @@ static void pl2303_read_int_callback(struct urb *urb) 
	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;

	unsigned char *data = urb->transfer_buffer;

	unsigned int actual_length = urb->actual_length;

	int status;

	int status = urb->status;

	int retval;



	dbg("%s (%d)", __FUNCTION__, port->number);



	switch (urb->status) {

	switch (status) {

	case 0:

		/* success */

		break;
@@ -974,11 +975,11 @@ static void pl2303_read_int_callback(struct urb *urb) 
	case -ESHUTDOWN:

		/* this urb is terminated, clean up */

		dbg("%s - urb shutting down with status: %d", __FUNCTION__,

		    urb->status);

		    status);

		return;

	default:

		dbg("%s - nonzero urb status received: %d", __FUNCTION__,

		    urb->status);

		    status);

		goto exit;

	}
@@ -988,11 +989,11 @@ static void pl2303_read_int_callback(struct urb *urb) 
	pl2303_update_line_status(port, data, actual_length);



exit:

	status = usb_submit_urb(urb, GFP_ATOMIC);

	if (status)

	retval = usb_submit_urb(urb, GFP_ATOMIC);

	if (retval)

		dev_err(&urb->dev->dev,

			"%s - usb_submit_urb failed with result %d\n",

			__FUNCTION__, status);

			__FUNCTION__, retval);

}



static void pl2303_read_bulk_callback(struct urb *urb)
@@ -1004,23 +1005,23 @@ static void pl2303_read_bulk_callback(struct urb *urb) 
	unsigned long flags;

	int i;

	int result;

	u8 status;

	int status = urb->status;

	u8 line_status;

	char tty_flag;



	dbg("%s - port %d", __FUNCTION__, port->number);



	if (urb->status) {

		dbg("%s - urb->status = %d", __FUNCTION__, urb->status);

	if (status) {

		dbg("%s - urb status = %d", __FUNCTION__, status);

		if (!port->open_count) {

			dbg("%s - port is closed, exiting.", __FUNCTION__);

			return;

		}

		if (urb->status == -EPROTO) {

		if (status == -EPROTO) {

			/* PL2303 mysteriously fails with -EPROTO reschedule

			 * the read */

			dbg("%s - caught -EPROTO, resubmitting the urb",

			    __FUNCTION__);

			urb->status = 0;

			urb->dev = port->serial->dev;

			result = usb_submit_urb(urb, GFP_ATOMIC);

			if (result)
@@ -1040,18 +1041,18 @@ static void pl2303_read_bulk_callback(struct urb *urb) 
	tty_flag = TTY_NORMAL;



	spin_lock_irqsave(&priv->lock, flags);

	status = priv->line_status;

	line_status = priv->line_status;

	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;

	spin_unlock_irqrestore(&priv->lock, flags);

	wake_up_interruptible(&priv->delta_msr_wait);



	/* break takes precedence over parity, */

	/* which takes precedence over framing errors */

	if (status & UART_BREAK_ERROR )

	if (line_status & UART_BREAK_ERROR )

		tty_flag = TTY_BREAK;

	else if (status & UART_PARITY_ERROR)

	else if (line_status & UART_PARITY_ERROR)

		tty_flag = TTY_PARITY;

	else if (status & UART_FRAME_ERROR)

	else if (line_status & UART_FRAME_ERROR)

		tty_flag = TTY_FRAME;

	dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
@@ -1059,7 +1060,7 @@ static void pl2303_read_bulk_callback(struct urb *urb) 
	if (tty && urb->actual_length) {

		tty_buffer_request_room(tty, urb->actual_length + 1);

		/* overrun is special, not associated with a char */

		if (status & UART_OVERRUN_ERROR)

		if (line_status & UART_OVERRUN_ERROR)

			tty_insert_flip_char(tty, 0, TTY_OVERRUN);

		for (i = 0; i < urb->actual_length; ++i)

			tty_insert_flip_char(tty, data[i], tty_flag);
@@ -1083,10 +1084,11 @@ static void pl2303_write_bulk_callback(struct urb *urb) 
	struct usb_serial_port *port = (struct usb_serial_port *) urb->context;

	struct pl2303_private *priv = usb_get_serial_port_data(port);

	int result;

	int status = urb->status;



	dbg("%s - port %d", __FUNCTION__, port->number);



	switch (urb->status) {

	switch (status) {

	case 0:

		/* success */

		break;
@@ -1095,14 +1097,14 @@ static void pl2303_write_bulk_callback(struct urb *urb) 
	case -ESHUTDOWN:

		/* this urb is terminated, clean up */

		dbg("%s - urb shutting down with status: %d", __FUNCTION__,

		    urb->status);

		    status);

		priv->write_urb_in_use = 0;

		return;

	default:

		/* error in the urb, so we have to resubmit it */

		dbg("%s - Overflow in write", __FUNCTION__);

		dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,

		    urb->status);

		    status);

		port->write_urb->transfer_buffer_length = 1;

		port->write_urb->dev = port->serial->dev;

		result = usb_submit_urb(port->write_urb, GFP_ATOMIC);