Merge tag 'usb-serial-4.11-rc1' of git://git.kernel.org/pub/scm/linux…

…/kernel/git/johan/usb-serial into usb-next

Johan writes:

USB-serial updates for v4.11-rc1

These updates include

 - a new driver for Renesas uPD78F0730-based devices

 - several fixes of failures to check for short transfers, some of which could
   lead to minor information leaks, and in one case a loop-condition underflow

 - a fix of a long-standing regression in the ftdi_sio driver which resulted
   in excessive bulk-in interrupts

 - a fix for ftdi_sio line-status over-reporting which could lead to an
   endless stream of NULL-characters being forwarded to user space

 - a fix for a regression in the console driver

 - a fix for another mos7840 NULL-pointer dereference due to a missing endpoint
   sanity check

Included are also some clean ups and fixes for various minor issues, as well as
a couple of new device IDs that came in late.

All but the final patch have been in linux-next with no reported issues.

Signed-off-by: Johan Hovold <[email protected]>

drivers/usb/serial/Kconfig

@@ -713,6 +713,15 @@ config USB_SERIAL_QT2
 	  To compile this driver as a module, choose M here: the
 	  module will be called quatech-serial.
 
+config USB_SERIAL_UPD78F0730
+	tristate "USB Renesas uPD78F0730 Single Port Serial Driver"
+	help
+	  Say Y here if you want to use the Renesas uPD78F0730
+	  serial driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called upd78f0730.
+
 config USB_SERIAL_DEBUG
 	tristate "USB Debugging Device"
 	help

drivers/usb/serial/Makefile

@@ -56,6 +56,7 @@ obj-$(CONFIG_USB_SERIAL_SSU100)			+= ssu100.o
 obj-$(CONFIG_USB_SERIAL_SYMBOL)			+= symbolserial.o
 obj-$(CONFIG_USB_SERIAL_WWAN)			+= usb_wwan.o
 obj-$(CONFIG_USB_SERIAL_TI)			+= ti_usb_3410_5052.o
+obj-$(CONFIG_USB_SERIAL_UPD78F0730)		+= upd78f0730.o
 obj-$(CONFIG_USB_SERIAL_VISOR)			+= visor.o
 obj-$(CONFIG_USB_SERIAL_WISHBONE)		+= wishbone-serial.o
 obj-$(CONFIG_USB_SERIAL_WHITEHEAT)		+= whiteheat.o

drivers/usb/serial/ark3116.c

@@ -99,10 +99,17 @@ static int ark3116_read_reg(struct usb_serial *serial,
 				 usb_rcvctrlpipe(serial->dev, 0),
 				 0xfe, 0xc0, 0, reg,
 				 buf, 1, ARK_TIMEOUT);
-	if (result < 0)
+	if (result < 1) {
+		dev_err(&serial->interface->dev,
+				"failed to read register %u: %d\n",
+				reg, result);
+		if (result >= 0)
+			result = -EIO;
+
 		return result;
-	else
-		return buf[0];
+	}
+
+	return buf[0];
 }
 
 static inline int calc_divisor(int bps)
@@ -118,17 +125,11 @@ static inline int calc_divisor(int bps)
 static int ark3116_attach(struct usb_serial *serial)
 {
 	/* make sure we have our end-points */
-	if ((serial->num_bulk_in == 0) ||
-	    (serial->num_bulk_out == 0) ||
-	    (serial->num_interrupt_in == 0)) {
-		dev_err(&serial->dev->dev,
-			"%s - missing endpoint - "
-			"bulk in: %d, bulk out: %d, int in %d\n",
-			KBUILD_MODNAME,
-			serial->num_bulk_in,
-			serial->num_bulk_out,
-			serial->num_interrupt_in);
-		return -EINVAL;
+	if (serial->num_bulk_in == 0 ||
+			serial->num_bulk_out == 0 ||
+			serial->num_interrupt_in == 0) {
+		dev_err(&serial->interface->dev, "missing endpoint\n");
+		return -ENODEV;
 	}
 
 	return 0;
@@ -186,10 +187,8 @@ static int ark3116_port_probe(struct usb_serial_port *port)
 	if (priv->irda)
 		ark3116_write_reg(serial, 0x9, 0);
 
-	dev_info(&serial->dev->dev,
-		"%s using %s mode\n",
-		KBUILD_MODNAME,
-		priv->irda ? "IrDA" : "RS232");
+	dev_info(&port->dev, "using %s mode\n", priv->irda ? "IrDA" : "RS232");
+
 	return 0;
 }
 
@@ -325,9 +324,8 @@ static void ark3116_set_termios(struct tty_struct *tty,
 
 	/* check for software flow control */
 	if (I_IXOFF(tty) || I_IXON(tty)) {
-		dev_warn(&serial->dev->dev,
-			 "%s: don't know how to do software flow control\n",
-			 KBUILD_MODNAME);
+		dev_warn(&port->dev,
+				"software flow control not implemented\n");
 	}
 
 	/* Don't rewrite B0 */
@@ -346,8 +344,8 @@ static void ark3116_close(struct usb_serial_port *port)
 	ark3116_write_reg(serial, UART_IER, 0);
 
 	usb_serial_generic_close(port);
-	if (serial->num_interrupt_in)
-		usb_kill_urb(port->interrupt_in_urb);
+
+	usb_kill_urb(port->interrupt_in_urb);
 }
 
 static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
@@ -366,23 +364,29 @@ static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
 		dev_dbg(&port->dev,
 			"%s - usb_serial_generic_open failed: %d\n",
 			__func__, result);
-		goto err_out;
+		goto err_free;
 	}
 
 	/* remove any data still left: also clears error state */
 	ark3116_read_reg(serial, UART_RX, buf);
 
 	/* read modem status */
-	priv->msr = ark3116_read_reg(serial, UART_MSR, buf);
+	result = ark3116_read_reg(serial, UART_MSR, buf);
+	if (result < 0)
+		goto err_close;
+	priv->msr = *buf;
+
 	/* read line status */
-	priv->lsr = ark3116_read_reg(serial, UART_LSR, buf);
+	result = ark3116_read_reg(serial, UART_LSR, buf);
+	if (result < 0)
+		goto err_close;
+	priv->lsr = *buf;
 
 	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 	if (result) {
 		dev_err(&port->dev, "submit irq_in urb failed %d\n",
 			result);
-		ark3116_close(port);
-		goto err_out;
+		goto err_close;
 	}
 
 	/* activate interrupts */
@@ -395,8 +399,15 @@ static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
 	if (tty)
 		ark3116_set_termios(tty, port, NULL);
 
-err_out:
 	kfree(buf);
+
+	return 0;
+
+err_close:
+	usb_serial_generic_close(port);
+err_free:
+	kfree(buf);
+
 	return result;
 }
 
@@ -602,9 +613,8 @@ static void ark3116_read_int_callback(struct urb *urb)
 
 	result = usb_submit_urb(urb, GFP_ATOMIC);
 	if (result)
-		dev_err(&urb->dev->dev,
-			"%s - Error %d submitting interrupt urb\n",
-			__func__, result);
+		dev_err(&port->dev, "failed to resubmit interrupt urb: %d\n",
+			result);
 }