diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index eca1747ca8c7..cfd009dc4018 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -155,6 +155,7 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
 	{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
 	{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
+	{ USB_DEVICE(0x1BA4, 0x0002) },	/* Silicon Labs 358x factory default */
 	{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
 	{ USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
 	{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index dc72b924c399..0dad8ce5a609 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -140,6 +140,7 @@ static struct ftdi_sio_quirk ftdi_8u2232c_quirk = {
  * /sys/bus/usb-serial/drivers/ftdi_sio/new_id and send a patch or report.
  */
 static const struct usb_device_id id_table_combined[] = {
+	{ USB_DEVICE(FTDI_VID, FTDI_BRICK_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_ZEITCONTROL_TAGTRACE_MIFARE_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_CTI_MINI_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_CTI_NANO_PID) },
@@ -661,6 +662,8 @@ static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) },
 	{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) },
 	{ USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) },
+	{ USB_DEVICE(XSENS_VID, XSENS_AWINDA_DONGLE_PID) },
+	{ USB_DEVICE(XSENS_VID, XSENS_AWINDA_STATION_PID) },
 	{ USB_DEVICE(XSENS_VID, XSENS_CONVERTER_PID) },
 	{ USB_DEVICE(XSENS_VID, XSENS_MTW_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_OMNI1509) },
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 5937b2d242f2..6786b705ccf6 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -30,6 +30,12 @@
 
 /*** third-party PIDs (using FTDI_VID) ***/
 
+/*
+ * Certain versions of the official Windows FTDI driver reprogrammed
+ * counterfeit FTDI devices to PID 0. Support these devices anyway.
+ */
+#define FTDI_BRICK_PID		0x0000
+
 #define FTDI_LUMEL_PD12_PID	0x6002
 
 /*
@@ -143,8 +149,12 @@
  * Xsens Technologies BV products (http://www.xsens.com).
  */
 #define XSENS_VID		0x2639
-#define XSENS_CONVERTER_PID	0xD00D	/* Xsens USB-serial converter */
+#define XSENS_AWINDA_STATION_PID 0x0101
+#define XSENS_AWINDA_DONGLE_PID 0x0102
 #define XSENS_MTW_PID		0x0200	/* Xsens MTw */
+#define XSENS_CONVERTER_PID	0xD00D	/* Xsens USB-serial converter */
+
+/* Xsens devices using FTDI VID */
 #define XSENS_CONVERTER_0_PID	0xD388	/* Xsens USB converter */
 #define XSENS_CONVERTER_1_PID	0xD389	/* Xsens Wireless Receiver */
 #define XSENS_CONVERTER_2_PID	0xD38A
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index 078f9ed419c8..3d2bd65df0fc 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -414,8 +414,6 @@ static int kobil_tiocmset(struct tty_struct *tty,
 	int result;
 	int dtr = 0;
 	int rts = 0;
-	unsigned char *transfer_buffer;
-	int transfer_buffer_length = 8;
 
 	/* FIXME: locking ? */
 	priv = usb_get_serial_port_data(port);
@@ -425,11 +423,6 @@ static int kobil_tiocmset(struct tty_struct *tty,
 		return -EINVAL;
 	}
 
-	/* allocate memory for transfer buffer */
-	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
-	if (!transfer_buffer)
-		return -ENOMEM;
-
 	if (set & TIOCM_RTS)
 		rts = 1;
 	if (set & TIOCM_DTR)
@@ -469,7 +462,6 @@ static int kobil_tiocmset(struct tty_struct *tty,
 			KOBIL_TIMEOUT);
 	}
 	dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result);
-	kfree(transfer_buffer);
 	return (result < 0) ? result : 0;
 }
 
@@ -530,8 +522,6 @@ static int kobil_ioctl(struct tty_struct *tty,
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct kobil_private *priv = usb_get_serial_port_data(port);
-	unsigned char *transfer_buffer;
-	int transfer_buffer_length = 8;
 	int result;
 
 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
@@ -541,10 +531,6 @@ static int kobil_ioctl(struct tty_struct *tty,
 
 	switch (cmd) {
 	case TCFLSH:
-		transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
-		if (!transfer_buffer)
-			return -ENOBUFS;
-
 		result = usb_control_msg(port->serial->dev,
 			  usb_sndctrlpipe(port->serial->dev, 0),
 			  SUSBCRequest_Misc,
@@ -559,7 +545,6 @@ static int kobil_ioctl(struct tty_struct *tty,
 		dev_dbg(&port->dev,
 			"%s - Send reset_all_queues (FLUSH) URB returns: %i\n",
 			__func__, result);
-		kfree(transfer_buffer);
 		return (result < 0) ? -EIO: 0;
 	default:
 		return -ENOIOCTLCMD;
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index d1a3f6044c8a..7a4c21b4f676 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -269,6 +269,7 @@ static void option_instat_callback(struct urb *urb);
 #define TELIT_PRODUCT_DE910_DUAL		0x1010
 #define TELIT_PRODUCT_UE910_V2			0x1012
 #define TELIT_PRODUCT_LE920			0x1200
+#define TELIT_PRODUCT_LE910			0x1201
 
 /* ZTE PRODUCTS */
 #define ZTE_VENDOR_ID				0x19d2
@@ -362,6 +363,7 @@ static void option_instat_callback(struct urb *urb);
 
 /* Haier products */
 #define HAIER_VENDOR_ID				0x201e
+#define HAIER_PRODUCT_CE81B			0x10f8
 #define HAIER_PRODUCT_CE100			0x2009
 
 /* Cinterion (formerly Siemens) products */
@@ -589,6 +591,11 @@ static const struct option_blacklist_info zte_1255_blacklist = {
 	.reserved = BIT(3) | BIT(4),
 };
 
+static const struct option_blacklist_info telit_le910_blacklist = {
+	.sendsetup = BIT(0),
+	.reserved = BIT(1) | BIT(2),
+};
+
 static const struct option_blacklist_info telit_le920_blacklist = {
 	.sendsetup = BIT(0),
 	.reserved = BIT(1) | BIT(5),
@@ -1138,6 +1145,8 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_CC864_SINGLE) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_DE910_DUAL) },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_UE910_V2) },
+	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE910),
+		.driver_info = (kernel_ulong_t)&telit_le910_blacklist },
 	{ USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_LE920),
 		.driver_info = (kernel_ulong_t)&telit_le920_blacklist },
 	{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, ZTE_PRODUCT_MF622, 0xff, 0xff, 0xff) }, /* ZTE WCDMA products */
@@ -1621,6 +1630,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(LONGCHEER_VENDOR_ID, ZOOM_PRODUCT_4597) },
 	{ USB_DEVICE(LONGCHEER_VENDOR_ID, IBALL_3_5G_CONNECT) },
 	{ USB_DEVICE(HAIER_VENDOR_ID, HAIER_PRODUCT_CE100) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(HAIER_VENDOR_ID, HAIER_PRODUCT_CE81B, 0xff, 0xff, 0xff) },
 	/* Pirelli  */
 	{ USB_DEVICE_INTERFACE_CLASS(PIRELLI_VENDOR_ID, PIRELLI_PRODUCT_C100_1, 0xff) },
 	{ USB_DEVICE_INTERFACE_CLASS(PIRELLI_VENDOR_ID, PIRELLI_PRODUCT_C100_2, 0xff) },