[PATCH 08/11] USB: serial: mos7840: drop serial struct accessor

[Johan Hovold <johan@xxxxxxxxxx>]

Drop the helper used to retrieve the serial struct pointer from the port
structure.

Note that this helper was only used when the serial structure was
actually not needed.

Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
 drivers/usb/serial/mos7840.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 207b88d948a9..01787685a4ee 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -446,19 +446,6 @@ static void mos7840_led_activity(struct usb_serial_port *port)
 				jiffies + msecs_to_jiffies(LED_ON_MS));
 }
 
-static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
-						 const char *function)
-{
-	/* if no port was specified */
-	if (!port) {
-		/* then say that we don't have a valid usb_serial thing,
-		 * which will end up genrating -ENODEV return values */
-		return NULL;
-	}
-
-	return port->serial;
-}
-
 /*****************************************************************************
  * mos7840_bulk_in_callback
  *	this is the callback function for when we have received data on the
@@ -471,7 +458,6 @@ static void mos7840_bulk_in_callback(struct urb *urb)
 	struct usb_serial_port *port = mos7840_port->port;
 	int retval;
 	unsigned char *data;
-	struct usb_serial *serial;
 	int status = urb->status;
 
 	if (status) {
@@ -480,12 +466,6 @@ static void mos7840_bulk_in_callback(struct urb *urb)
 		return;
 	}
 
-	serial = mos7840_get_usb_serial(port, __func__);
-	if (!serial) {
-		mos7840_port->read_urb_busy = false;
-		return;
-	}
-
 	data = urb->transfer_buffer;
 	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
 
@@ -822,15 +802,10 @@ static int mos7840_chars_in_buffer(struct tty_struct *tty)
 
 static void mos7840_close(struct usb_serial_port *port)
 {
-	struct usb_serial *serial;
 	struct moschip_port *mos7840_port;
 	int j;
 	__u16 Data;
 
-	serial = mos7840_get_usb_serial(port, __func__);
-	if (!serial)
-		return;
-
 	mos7840_port = mos7840_get_port_private(port);
 	if (mos7840_port == NULL)
 		return;
@@ -866,13 +841,8 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	unsigned char data;
-	struct usb_serial *serial;
 	struct moschip_port *mos7840_port;
 
-	serial = mos7840_get_usb_serial(port, __func__);
-	if (!serial)
-		return;
-
 	mos7840_port = mos7840_get_port_private(port);
 
 	if (mos7840_port == NULL)
-- 
2.23.0