[PATCH v2 08/12] USB: serial: io_edgeport: drop redundant sanity checks

[Johan Hovold <johan@kernel.org>]

The serial and port driver data is allocated at probe() before
registering the ports and will never be NULL when open(), close(),
write(), throttle() and unthrottle() are called.

Drop the redundant driver data sanity checks.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/io_edgeport.c | 29 ++++-------------------------
 1 file changed, 4 insertions(+), 25 deletions(-)

diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 0fd68faa8427..d00fc99d13dd 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -810,20 +810,13 @@ static void edge_bulk_out_cmd_callback(struct urb *urb)
 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
+	struct usb_serial *serial = port->serial;
+	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
 	struct device *dev = &port->dev;
-	struct usb_serial *serial;
-	struct edgeport_serial *edge_serial;
 	int response;
 
-	if (edge_port == NULL)
-		return -ENODEV;
-
 	/* see if we've set up our endpoint info yet (can't set it up
 	   in edge_startup as the structures were not set up at that time.) */
-	serial = port->serial;
-	edge_serial = usb_get_serial_data(serial);
-	if (edge_serial == NULL)
-		return -ENODEV;
 	if (edge_serial->interrupt_in_buffer == NULL) {
 		struct usb_serial_port *port0 = serial->port[0];
 
@@ -1052,15 +1045,10 @@ static void block_until_tx_empty(struct edgeport_port *edge_port)
  *****************************************************************************/
 static void edge_close(struct usb_serial_port *port)
 {
-	struct edgeport_serial *edge_serial;
-	struct edgeport_port *edge_port;
+	struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
+	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 	int status;
 
-	edge_serial = usb_get_serial_data(port->serial);
-	edge_port = usb_get_serial_port_data(port);
-	if (edge_serial == NULL || edge_port == NULL)
-		return;
-
 	/* block until tx is empty */
 	block_until_tx_empty(edge_port);
 
@@ -1125,9 +1113,6 @@ static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 	int secondhalf;
 	unsigned long flags;
 
-	if (edge_port == NULL)
-		return -ENODEV;
-
 	/* get a pointer to the Tx fifo */
 	fifo = &edge_port->txfifo;
 
@@ -1384,9 +1369,6 @@ static void edge_throttle(struct tty_struct *tty)
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 	int status;
 
-	if (edge_port == NULL)
-		return;
-
 	if (!edge_port->open) {
 		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
 		return;
@@ -1424,9 +1406,6 @@ static void edge_unthrottle(struct tty_struct *tty)
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 	int status;
 
-	if (edge_port == NULL)
-		return;
-
 	if (!edge_port->open) {
 		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
 		return;
-- 
2.55.0