Merge tag 'usb-serial-4.0-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for v4.0-rc3

Here are a few fixes for reported problems including a usb-debug device
buffer overflow, potential use-after-free on failed probe, and a couple
of issues with the USB console.

Some new device IDs are also added.

Signed-off-by: Johan Hovold <johan@kernel.org>

9 files changed, 105 insertions, 43 deletions

diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
index 9374bd2aba20..8936a83c96cd 100644
--- a/drivers/usb/serial/bus.c
+++ b/drivers/usb/serial/bus.c
@@ -38,56 +38,51 @@ static int usb_serial_device_match(struct device *dev,
 	return 0;
 }
 
-static ssize_t port_number_show(struct device *dev,
-				struct device_attribute *attr, char *buf)
-{
-	struct usb_serial_port *port = to_usb_serial_port(dev);
-
-	return sprintf(buf, "%d\n", port->port_number);
-}
-static DEVICE_ATTR_RO(port_number);
-
 static int usb_serial_device_probe(struct device *dev)
 {
 	struct usb_serial_driver *driver;
 	struct usb_serial_port *port;
+	struct device *tty_dev;
 	int retval = 0;
 	int minor;
 
 	port = to_usb_serial_port(dev);
-	if (!port) {
-		retval = -ENODEV;
-		goto exit;
-	}
+	if (!port)
+		return -ENODEV;
 
 	/* make sure suspend/resume doesn't race against port_probe */
 	retval = usb_autopm_get_interface(port->serial->interface);
 	if (retval)
-		goto exit;
+		return retval;
 
 	driver = port->serial->type;
 	if (driver->port_probe) {
 		retval = driver->port_probe(port);
 		if (retval)
-			goto exit_with_autopm;
+			goto err_autopm_put;
 	}
 
-	retval = device_create_file(dev, &dev_attr_port_number);
-	if (retval) {
-		if (driver->port_remove)
-			retval = driver->port_remove(port);
-		goto exit_with_autopm;
+	minor = port->minor;
+	tty_dev = tty_register_device(usb_serial_tty_driver, minor, dev);
+	if (IS_ERR(tty_dev)) {
+		retval = PTR_ERR(tty_dev);
+		goto err_port_remove;
 	}
 
-	minor = port->minor;
-	tty_register_device(usb_serial_tty_driver, minor, dev);
+	usb_autopm_put_interface(port->serial->interface);
+
 	dev_info(&port->serial->dev->dev,
 		 "%s converter now attached to ttyUSB%d\n",
 		 driver->description, minor);
 
-exit_with_autopm:
+	return 0;
+
+err_port_remove:
+	if (driver->port_remove)
+		driver->port_remove(port);
+err_autopm_put:
 	usb_autopm_put_interface(port->serial->interface);
-exit:
+
 	return retval;
 }
 
@@ -114,8 +109,6 @@ static int usb_serial_device_remove(struct device *dev)
 	minor = port->minor;
 	tty_unregister_device(usb_serial_tty_driver, minor);
 
-	device_remove_file(&port->dev, &dev_attr_port_number);
-
 	driver = port->serial->type;
 	if (driver->port_remove)
 		retval = driver->port_remove(port);
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 2d72aa3564a3..ede4f5fcfadd 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -84,6 +84,10 @@ struct ch341_private {
 	u8 line_status; /* active status of modem control inputs */
 };
 
+static void ch341_set_termios(struct tty_struct *tty,
+			      struct usb_serial_port *port,
+			      struct ktermios *old_termios);
+
 static int ch341_control_out(struct usb_device *dev, u8 request,
 			     u16 value, u16 index)
 {
@@ -309,19 +313,12 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
 	struct ch341_private *priv = usb_get_serial_port_data(port);
 	int r;
 
-	priv->baud_rate = DEFAULT_BAUD_RATE;
-
 	r = ch341_configure(serial->dev, priv);
 	if (r)
 		goto out;
 
-	r = ch341_set_handshake(serial->dev, priv->line_control);
-	if (r)
-		goto out;
-
-	r = ch341_set_baudrate(serial->dev, priv);
-	if (r)
-		goto out;
+	if (tty)
+		ch341_set_termios(tty, port, NULL);
 
 	dev_dbg(&port->dev, "%s - submitting interrupt urb\n", __func__);
 	r = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 29fa1c3d0089..3806e7014199 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -14,6 +14,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/tty.h>
 #include <linux/console.h>
@@ -144,6 +145,7 @@ static int usb_console_setup(struct console *co, char *options)
 			init_ldsem(&tty->ldisc_sem);
 			INIT_LIST_HEAD(&tty->tty_files);
 			kref_get(&tty->driver->kref);
+			__module_get(tty->driver->owner);
 			tty->ops = &usb_console_fake_tty_ops;
 			if (tty_init_termios(tty)) {
 				retval = -ENOMEM;
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index f40c856ff758..84ce2d74894c 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -147,6 +147,8 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
 	{ USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
 	{ USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
+	{ USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
+	{ USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
 	{ USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
 	{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
 	{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 1ebb351b9e9a..3086dec0ef53 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -799,6 +799,8 @@ static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PROPOX_ISPCABLEIII_PID) },
+	{ USB_DEVICE(FTDI_VID, CYBER_CORTEX_AV_PID),
+		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID),
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_H_PID),
@@ -978,6 +980,23 @@ static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE_INTERFACE_NUMBER(INFINEON_VID, INFINEON_TRIBOARD_PID, 1) },
 	/* GE Healthcare devices */
 	{ USB_DEVICE(GE_HEALTHCARE_VID, GE_HEALTHCARE_NEMO_TRACKER_PID) },
+	/* Active Research (Actisense) devices */
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_NDC_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_USG_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_NGT_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_NGW_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_D9AC_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_D9AD_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_D9AE_PID) },
+	{ USB_DEVICE(FTDI_VID, ACTISENSE_D9AF_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEAGAUGE_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASWITCH_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_NMEA2000_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_ETHERNET_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_WIFI_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_DISPLAY_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_LITE_PID) },
+	{ USB_DEVICE(FTDI_VID, CHETCO_SEASMART_ANALOG_PID) },
 	{ }					/* Terminating entry */
 };
 
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index e52409c9be99..56b1b55c4751 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -38,6 +38,9 @@
 
 #define FTDI_LUMEL_PD12_PID	0x6002
 
+/* Cyber Cortex AV by Fabulous Silicon (http://fabuloussilicon.com) */
+#define CYBER_CORTEX_AV_PID	0x8698
+
 /*
  * Marvell OpenRD Base, Client
  * http://www.open-rd.org
@@ -1438,3 +1441,23 @@
  */
 #define GE_HEALTHCARE_VID		0x1901
 #define GE_HEALTHCARE_NEMO_TRACKER_PID	0x0015
+
+/*
+ * Active Research (Actisense) devices
+ */
+#define ACTISENSE_NDC_PID		0xD9A8 /* NDC USB Serial Adapter */
+#define ACTISENSE_USG_PID		0xD9A9 /* USG USB Serial Adapter */
+#define ACTISENSE_NGT_PID		0xD9AA /* NGT NMEA2000 Interface */
+#define ACTISENSE_NGW_PID		0xD9AB /* NGW NMEA2000 Gateway */
+#define ACTISENSE_D9AC_PID		0xD9AC /* Actisense Reserved */
+#define ACTISENSE_D9AD_PID		0xD9AD /* Actisense Reserved */
+#define ACTISENSE_D9AE_PID		0xD9AE /* Actisense Reserved */
+#define ACTISENSE_D9AF_PID		0xD9AF /* Actisense Reserved */
+#define CHETCO_SEAGAUGE_PID		0xA548 /* SeaGauge USB Adapter */
+#define CHETCO_SEASWITCH_PID		0xA549 /* SeaSwitch USB Adapter */
+#define CHETCO_SEASMART_NMEA2000_PID	0xA54A /* SeaSmart NMEA2000 Gateway */
+#define CHETCO_SEASMART_ETHERNET_PID	0xA54B /* SeaSmart Ethernet Gateway */
+#define CHETCO_SEASMART_WIFI_PID	0xA5AC /* SeaSmart Wifi Gateway */
+#define CHETCO_SEASMART_DISPLAY_PID	0xA5AD /* SeaSmart NMEA2000 Display */
+#define CHETCO_SEASMART_LITE_PID	0xA5AE /* SeaSmart Lite USB Adapter */
+#define CHETCO_SEASMART_ANALOG_PID	0xA5AF /* SeaSmart Analog Adapter */
diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
index ab1d690274ae..460a40669967 100644
--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -1284,7 +1284,8 @@ static int mxuport_open(struct tty_struct *tty, struct usb_serial_port *port)
 	}
 
 	/* Initial port termios */
-	mxuport_set_termios(tty, port, NULL);
+	if (tty)
+		mxuport_set_termios(tty, port, NULL);
 
 	/*
 	 * TODO: use RQ_VENDOR_GET_MSR, once we know what it
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 0f872e6b2c87..829604d11f3f 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -132,6 +132,7 @@ MODULE_DEVICE_TABLE(usb, id_table);
 #define UART_OVERRUN_ERROR		0x40
 #define UART_CTS			0x80
 
+static void pl2303_set_break(struct usb_serial_port *port, bool enable);
 
 enum pl2303_type {
 	TYPE_01,	/* Type 0 and 1 (difference unknown) */
@@ -615,6 +616,7 @@ static void pl2303_close(struct usb_serial_port *port)
 {
 	usb_serial_generic_close(port);
 	usb_kill_urb(port->interrupt_in_urb);
+	pl2303_set_break(port, false);
 }
 
 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
@@ -741,17 +743,16 @@ static int pl2303_ioctl(struct tty_struct *tty,
 	return -ENOIOCTLCMD;
 }
 
-static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
+static void pl2303_set_break(struct usb_serial_port *port, bool enable)
 {
-	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = port->serial;
 	u16 state;
 	int result;
 
-	if (break_state == 0)
-		state = BREAK_OFF;
-	else
+	if (enable)
 		state = BREAK_ON;
+	else
+		state = BREAK_OFF;
 
 	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
 			state == BREAK_OFF ? "off" : "on");
@@ -763,6 +764,13 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
 		dev_err(&port->dev, "error sending break = %d\n", result);
 }
 
+static void pl2303_break_ctl(struct tty_struct *tty, int state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+
+	pl2303_set_break(port, state);
+}
+
 static void pl2303_update_line_status(struct usb_serial_port *port,
 				      unsigned char *data,
 				      unsigned int actual_length)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 475723c006f9..529066bbc7e8 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -687,6 +687,21 @@ static void serial_port_dtr_rts(struct tty_port *port, int on)
 		drv->dtr_rts(p, on);
 }
 
+static ssize_t port_number_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct usb_serial_port *port = to_usb_serial_port(dev);
+
+	return sprintf(buf, "%u\n", port->port_number);
+}
+static DEVICE_ATTR_RO(port_number);
+
+static struct attribute *usb_serial_port_attrs[] = {
+	&dev_attr_port_number.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(usb_serial_port);
+
 static const struct tty_port_operations serial_port_ops = {
 	.carrier_raised		= serial_port_carrier_raised,
 	.dtr_rts		= serial_port_dtr_rts,
@@ -902,6 +917,7 @@ static int usb_serial_probe(struct usb_interface *interface,
 		port->dev.driver = NULL;
 		port->dev.bus = &usb_serial_bus_type;
 		port->dev.release = &usb_serial_port_release;
+		port->dev.groups = usb_serial_port_groups;
 		device_initialize(&port->dev);
 	}
 
@@ -940,8 +956,9 @@ static int usb_serial_probe(struct usb_interface *interface,
 		port = serial->port[i];
 		if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
 			goto probe_error;
-		buffer_size = max_t(int, serial->type->bulk_out_size,
-						usb_endpoint_maxp(endpoint));
+		buffer_size = serial->type->bulk_out_size;
+		if (!buffer_size)
+			buffer_size = usb_endpoint_maxp(endpoint);
 		port->bulk_out_size = buffer_size;
 		port->bulk_out_endpointAddress = endpoint->bEndpointAddress;