Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (172 commits)
  USB: Add support for SuperSpeed isoc endpoints
  xhci: Clean up cycle bit math used during stalls.
  xhci: Fix cycle bit calculation during stall handling.
  xhci: Update internal dequeue pointers after stalls.
  USB: Disable auto-suspend for USB 3.0 hubs.
  USB: Remove bogus USB_PORT_STAT_SUPER_SPEED symbol.
  xhci: Return canceled URBs immediately when host is halted.
  xhci: Fixes for suspend/resume of shared HCDs.
  xhci: Fix re-init on power loss after resume.
  xhci: Make roothub functions deal with device removal.
  xhci: Limit roothub ports to 15 USB3 & 31 USB2 ports.
  xhci: Return a USB 3.0 hub descriptor for USB3 roothub.
  xhci: Register second xHCI roothub.
  xhci: Change xhci_find_slot_id_by_port() API.
  xhci: Refactor bus suspend state into a struct.
  xhci: Index with a port array instead of PORTSC addresses.
  USB: Set usb_hcd->state and flags for shared roothubs.
  usb: Make core allocate resources per PCI-device.
  usb: Store bus type in usb_hcd, not in driver flags.
  usb: Change usb_hcd->bandwidth_mutex to a pointer.
  ...

14 files changed, 290 insertions, 79 deletions

diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 7b8815ddf368..14ac87ee9251 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -75,6 +75,7 @@ static int debug;
 static const struct usb_device_id id_table[] = {
         { USB_DEVICE(0x4348, 0x5523) },
         { USB_DEVICE(0x1a86, 0x7523) },
+        { USB_DEVICE(0x1a86, 0x5523) },
         { },
 };
 MODULE_DEVICE_TABLE(usb, id_table);
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index f349a3629d00..a75f9298d88f 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -722,6 +722,8 @@ static struct usb_device_id id_table_combined [] = {
         { USB_DEVICE(FTDI_VID, FTDI_PROPOX_JTAGCABLEII_PID) },
         { 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),
+                .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
         { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID),
@@ -973,7 +975,7 @@ static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
         int divisor3;
 
         /* hi-speed baud rate is 10-bit sampling instead of 16-bit */
-        divisor3 = (base / 10 / baud) * 8;
+        divisor3 = base * 8 / (baud * 10);
 
         divisor = divisor3 >> 3;
         divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 117e8e6f93c6..c543e55bafba 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -730,6 +730,7 @@
 /* Olimex */
 #define OLIMEX_VID                      0x15BA
 #define OLIMEX_ARM_USB_OCD_PID          0x0003
+#define OLIMEX_ARM_USB_OCD_H_PID        0x002b
 
 /*
  * Telldus Technologies
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 3b246d93cf22..76e3e502c23d 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -2343,7 +2343,6 @@ static int write_cmd_usb(struct edgeport_port *edge_port,
                                 usb_get_serial_data(edge_port->port->serial);
         int status = 0;
         struct urb *urb;
-        int timeout;
 
         usb_serial_debug_data(debug, &edge_port->port->dev,
                                                 __func__, length, buffer);
@@ -2376,8 +2375,6 @@ static int write_cmd_usb(struct edgeport_port *edge_port,
                 return status;
         }
 
-        /* wait for command to finish */
-        timeout = COMMAND_TIMEOUT;
 #if 0
         wait_event(&edge_port->wait_command, !edge_port->commandPending);
 
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 0791778a66f3..67f41b526570 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -2121,16 +2121,16 @@ static int keyspan_usa49_send_setup(struct usb_serial *serial,
         /* Work out which port within the device is being setup */
         device_port = port->number - port->serial->minor;
 
-        dbg("%s - endpoint %d port %d (%d)",
-                        __func__, usb_pipeendpoint(this_urb->pipe),
-                        port->number, device_port);
-
-                /* Make sure we have an urb then send the message */
+        /* Make sure we have an urb then send the message */
         if (this_urb == NULL) {
                 dbg("%s - oops no urb for port %d.", __func__, port->number);
                 return -1;
         }
 
+        dbg("%s - endpoint %d port %d (%d)",
+                        __func__, usb_pipeendpoint(this_urb->pipe),
+                        port->number, device_port);
+
         /* Save reset port val for resend.
            Don't overwrite resend for open/close condition. */
         if ((reset_port + 1) > p_priv->resend_cont)
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 554a8693a463..7b690f3282a2 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -173,7 +173,8 @@ static void keyspan_pda_wakeup_write(struct work_struct *work)
                 container_of(work, struct keyspan_pda_private, wakeup_work);
         struct usb_serial_port *port = priv->port;
         struct tty_struct *tty = tty_port_tty_get(&port->port);
-        tty_wakeup(tty);
+        if (tty)
+                tty_wakeup(tty);
         tty_kref_put(tty);
 }
 
@@ -206,7 +207,7 @@ static void keyspan_pda_request_unthrottle(struct work_struct *work)
 static void keyspan_pda_rx_interrupt(struct urb *urb)
 {
         struct usb_serial_port *port = urb->context;
-        struct tty_struct *tty = tty_port_tty_get(&port->port);
+        struct tty_struct *tty;
         unsigned char *data = urb->transfer_buffer;
         int retval;
         int status = urb->status;
@@ -223,7 +224,7 @@ static void keyspan_pda_rx_interrupt(struct urb *urb)
                 /* this urb is terminated, clean up */
                 dbg("%s - urb shutting down with status: %d",
                     __func__, status);
-                goto out;
+                return;
         default:
                 dbg("%s - nonzero urb status received: %d",
                     __func__, status);
@@ -233,12 +234,14 @@ static void keyspan_pda_rx_interrupt(struct urb *urb)
         /* see if the message is data or a status interrupt */
         switch (data[0]) {
         case 0:
-                /* rest of message is rx data */
-                if (urb->actual_length) {
+                tty = tty_port_tty_get(&port->port);
+                 /* rest of message is rx data */
+                if (tty && urb->actual_length) {
                         tty_insert_flip_string(tty, data + 1,
                                                 urb->actual_length - 1);
                         tty_flip_buffer_push(tty);
                 }
+                tty_kref_put(tty);
                 break;
         case 1:
                 /* status interrupt */
@@ -265,8 +268,6 @@ exit:
                 dev_err(&port->dev,
                         "%s - usb_submit_urb failed with result %d",
                         __func__, retval);
-out:
-        tty_kref_put(tty);                   
 }
 
 
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index bd5bd8589e04..b382d9a0274d 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -372,7 +372,7 @@ static void kobil_read_int_callback(struct urb *urb)
         }
 
         tty = tty_port_tty_get(&port->port);
-        if (urb->actual_length) {
+        if (tty && urb->actual_length) {
 
                 /* BEGIN DEBUG */
                 /*
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 2849f8c32015..1e225aacf46e 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -78,6 +78,8 @@
 #include <asm/unaligned.h>
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
+#include <linux/serial.h>
+#include <linux/ioctl.h>
 #include "mct_u232.h"
 
 /*
@@ -104,6 +106,10 @@ static void mct_u232_break_ctl(struct tty_struct *tty, int break_state);
 static int  mct_u232_tiocmget(struct tty_struct *tty, struct file *file);
 static int  mct_u232_tiocmset(struct tty_struct *tty, struct file *file,
                         unsigned int set, unsigned int clear);
+static int  mct_u232_ioctl(struct tty_struct *tty, struct file *file,
+                        unsigned int cmd, unsigned long arg);
+static int  mct_u232_get_icount(struct tty_struct *tty,
+                        struct serial_icounter_struct *icount);
 static void mct_u232_throttle(struct tty_struct *tty);
 static void mct_u232_unthrottle(struct tty_struct *tty);
 
@@ -150,9 +156,10 @@ static struct usb_serial_driver mct_u232_device = {
         .tiocmset =          mct_u232_tiocmset,
         .attach =            mct_u232_startup,
         .release =           mct_u232_release,
+        .ioctl =             mct_u232_ioctl,
+        .get_icount =        mct_u232_get_icount,
 };
 
-
 struct mct_u232_private {
         spinlock_t lock;
         unsigned int         control_state; /* Modem Line Setting (TIOCM) */
@@ -160,6 +167,9 @@ struct mct_u232_private {
         unsigned char        last_lsr;      /* Line Status Register */
         unsigned char        last_msr;      /* Modem Status Register */
         unsigned int         rx_flags;      /* Throttling flags */
+        struct async_icount  icount;
+        wait_queue_head_t    msr_wait;  /* for handling sleeping while waiting
+                                                for msr change to happen */
 };
 
 #define THROTTLED               0x01
@@ -386,6 +396,20 @@ static int mct_u232_get_modem_stat(struct usb_serial *serial,
         return rc;
 } /* mct_u232_get_modem_stat */
 
+static void mct_u232_msr_to_icount(struct async_icount *icount,
+                                                unsigned char msr)
+{
+        /* Translate Control Line states */
+        if (msr & MCT_U232_MSR_DDSR)
+                icount->dsr++;
+        if (msr & MCT_U232_MSR_DCTS)
+                icount->cts++;
+        if (msr & MCT_U232_MSR_DRI)
+                icount->rng++;
+        if (msr & MCT_U232_MSR_DCD)
+                icount->dcd++;
+} /* mct_u232_msr_to_icount */
+
 static void mct_u232_msr_to_state(unsigned int *control_state,
                                                 unsigned char msr)
 {
@@ -422,6 +446,7 @@ static int mct_u232_startup(struct usb_serial *serial)
         if (!priv)
                 return -ENOMEM;
         spin_lock_init(&priv->lock);
+        init_waitqueue_head(&priv->msr_wait);
         usb_set_serial_port_data(serial->port[0], priv);
 
         init_waitqueue_head(&serial->port[0]->write_wait);
@@ -621,6 +646,8 @@ static void mct_u232_read_int_callback(struct urb *urb)
         /* Record Control Line states */
         mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
 
+        mct_u232_msr_to_icount(&priv->icount, priv->last_msr);
+
 #if 0
         /* Not yet handled. See belkin_sa.c for further information */
         /* Now to report any errors */
@@ -647,6 +674,7 @@ static void mct_u232_read_int_callback(struct urb *urb)
                 tty_kref_put(tty);
         }
 #endif
+        wake_up_interruptible(&priv->msr_wait);
         spin_unlock_irqrestore(&priv->lock, flags);
 exit:
         retval = usb_submit_urb(urb, GFP_ATOMIC);
@@ -826,7 +854,6 @@ static void mct_u232_throttle(struct tty_struct *tty)
         }
 }
 
-
 static void mct_u232_unthrottle(struct tty_struct *tty)
 {
         struct usb_serial_port *port = tty->driver_data;
@@ -847,6 +874,82 @@ static void mct_u232_unthrottle(struct tty_struct *tty)
         }
 }
 
+static int  mct_u232_ioctl(struct tty_struct *tty, struct file *file,
+                        unsigned int cmd, unsigned long arg)
+{
+        DEFINE_WAIT(wait);
+        struct usb_serial_port *port = tty->driver_data;
+        struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port);
+        struct async_icount cnow, cprev;
+        unsigned long flags;
+
+        dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
+
+        switch (cmd) {
+
+        case TIOCMIWAIT:
+
+                dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
+
+                spin_lock_irqsave(&mct_u232_port->lock, flags);
+                cprev = mct_u232_port->icount;
+                spin_unlock_irqrestore(&mct_u232_port->lock, flags);
+                for ( ; ; ) {
+                        prepare_to_wait(&mct_u232_port->msr_wait,
+                                        &wait, TASK_INTERRUPTIBLE);
+                        schedule();
+                        finish_wait(&mct_u232_port->msr_wait, &wait);
+                        /* see if a signal did it */
+                        if (signal_pending(current))
+                                return -ERESTARTSYS;
+                        spin_lock_irqsave(&mct_u232_port->lock, flags);
+                        cnow = mct_u232_port->icount;
+                        spin_unlock_irqrestore(&mct_u232_port->lock, flags);
+                        if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+                            cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+                                return -EIO; /* no change => error */
+                        if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+                            ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+                            ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
+                            ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
+                                return 0;
+                        }
+                        cprev = cnow;
+                }
+
+        }
+        return -ENOIOCTLCMD;
+}
+
+static int  mct_u232_get_icount(struct tty_struct *tty,
+                        struct serial_icounter_struct *icount)
+{
+        struct usb_serial_port *port = tty->driver_data;
+        struct mct_u232_private *mct_u232_port = usb_get_serial_port_data(port);
+        struct async_icount *ic = &mct_u232_port->icount;
+        unsigned long flags;
+
+        spin_lock_irqsave(&mct_u232_port->lock, flags);
+
+        icount->cts = ic->cts;
+        icount->dsr = ic->dsr;
+        icount->rng = ic->rng;
+        icount->dcd = ic->dcd;
+        icount->rx = ic->rx;
+        icount->tx = ic->tx;
+        icount->frame = ic->frame;
+        icount->overrun = ic->overrun;
+        icount->parity = ic->parity;
+        icount->brk = ic->brk;
+        icount->buf_overrun = ic->buf_overrun;
+
+        spin_unlock_irqrestore(&mct_u232_port->lock, flags);
+
+        dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
+                __func__,  port->number, icount->rx, icount->tx);
+        return 0;
+}
+
 static int __init mct_u232_init(void)
 {
         int retval;
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 7d3bc9a3e2b6..ae506f4ee29d 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -2052,7 +2052,7 @@ static int mos7720_startup(struct usb_serial *serial)
         struct usb_device *dev;
         int i;
         char data;
-        u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
+        u16 product;
         int ret_val;
 
         dbg("%s: Entering ..........", __func__);
@@ -2062,6 +2062,7 @@ static int mos7720_startup(struct usb_serial *serial)
                 return -ENODEV;
         }
 
+        product = le16_to_cpu(serial->dev->descriptor.idProduct);
         dev = serial->dev;
 
         /*
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index eda1f9266c4e..ce82396fc4e8 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -1,6 +1,7 @@
 /*
  * Opticon USB barcode to serial driver
  *
+ * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com>
  * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de>
  * Copyright (C) 2008 - 2009 Novell Inc.
  *
@@ -21,6 +22,16 @@
 #include <linux/usb/serial.h>
 #include <linux/uaccess.h>
 
+#define CONTROL_RTS                     0x02
+#define RESEND_CTS_STATE        0x03
+
+/* max number of write urbs in flight */
+#define URB_UPPER_LIMIT 8
+
+/* This driver works for the Opticon 1D barcode reader
+ * an examples of 1D barcode types are EAN, UPC, Code39, IATA etc.. */
+#define DRIVER_DESC     "Opticon USB barcode to serial driver (1D)"
+
 static int debug;
 
 static const struct usb_device_id id_table[] = {
@@ -42,13 +53,13 @@ struct opticon_private {
         bool throttled;
         bool actually_throttled;
         bool rts;
+        bool cts;
         int outstanding_urbs;
 };
 
-/* max number of write urbs in flight */
-#define URB_UPPER_LIMIT 4
 
-static void opticon_bulk_callback(struct urb *urb)
+
+static void opticon_read_bulk_callback(struct urb *urb)
 {
         struct opticon_private *priv = urb->context;
         unsigned char *data = urb->transfer_buffer;
@@ -57,6 +68,7 @@ static void opticon_bulk_callback(struct urb *urb)
         struct tty_struct *tty;
         int result;
         int data_length;
+        unsigned long flags;
 
         dbg("%s - port %d", __func__, port->number);
 
@@ -87,10 +99,10 @@ static void opticon_bulk_callback(struct urb *urb)
                  * Data from the device comes with a 2 byte header:
                  *
                  * <0x00><0x00>data...
-                 *      This is real data to be sent to the tty layer
+                 *      This is real data to be sent to the tty layer
                  * <0x00><0x01)level
-                 *      This is a RTS level change, the third byte is the RTS
-                 *      value (0 for low, 1 for high).
+                 *      This is a CTS level change, the third byte is the CTS
+                 *      value (0 for low, 1 for high).
                  */
                 if ((data[0] == 0x00) && (data[1] == 0x00)) {
                         /* real data, send it to the tty layer */
@@ -103,10 +115,13 @@ static void opticon_bulk_callback(struct urb *urb)
                         }
                 } else {
                         if ((data[0] == 0x00) && (data[1] == 0x01)) {
+                                spin_lock_irqsave(&priv->lock, flags);
+                                /* CTS status infomation package */
                                 if (data[2] == 0x00)
-                                        priv->rts = false;
+                                        priv->cts = false;
                                 else
-                                        priv->rts = true;
+                                        priv->cts = true;
+                                spin_unlock_irqrestore(&priv->lock, flags);
                         } else {
                                 dev_dbg(&priv->udev->dev,
                                         "Unknown data packet received from the device:"
@@ -129,7 +144,7 @@ exit:
                                   usb_rcvbulkpipe(priv->udev,
                                                   priv->bulk_address),
                                   priv->bulk_in_buffer, priv->buffer_size,
-                                  opticon_bulk_callback, priv);
+                                  opticon_read_bulk_callback, priv);
                 result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
                 if (result)
                         dev_err(&port->dev,
@@ -140,6 +155,24 @@ exit:
         spin_unlock(&priv->lock);
 }
 
+static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
+                                u8 val)
+{
+        struct usb_serial *serial = port->serial;
+        int retval;
+        u8 buffer[2];
+
+        buffer[0] = val;
+        /* Send the message to the vendor control endpoint
+         * of the connected device */
+        retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+                                requesttype,
+                                USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
+                                0, 0, buffer, 1, 0);
+
+        return retval;
+}
+
 static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
         struct opticon_private *priv = usb_get_serial_data(port->serial);
@@ -152,19 +185,30 @@ static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
         priv->throttled = false;
         priv->actually_throttled = false;
         priv->port = port;
+        priv->rts = false;
         spin_unlock_irqrestore(&priv->lock, flags);
 
-        /* Start reading from the device */
+        /* Clear RTS line */
+        send_control_msg(port, CONTROL_RTS, 0);
+
+        /* Setup the read URB and start reading from the device */
         usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
                           usb_rcvbulkpipe(priv->udev,
                                           priv->bulk_address),
                           priv->bulk_in_buffer, priv->buffer_size,
-                          opticon_bulk_callback, priv);
+                          opticon_read_bulk_callback, priv);
+
+        /* clear the halt status of the enpoint */
+        usb_clear_halt(priv->udev, priv->bulk_read_urb->pipe);
+
         result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL);
         if (result)
                 dev_err(&port->dev,
                         "%s - failed resubmitting read urb, error %d\n",
                         __func__, result);
+        /* Request CTS line state, sometimes during opening the current
+         * CTS state can be missed. */
+        send_control_msg(port, RESEND_CTS_STATE, 1);
         return result;
 }
 
@@ -178,7 +222,7 @@ static void opticon_close(struct usb_serial_port *port)
         usb_kill_urb(priv->bulk_read_urb);
 }
 
-static void opticon_write_bulk_callback(struct urb *urb)
+static void opticon_write_control_callback(struct urb *urb)
 {
         struct opticon_private *priv = urb->context;
         int status = urb->status;
@@ -210,6 +254,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
         unsigned char *buffer;
         unsigned long flags;
         int status;
+        struct usb_ctrlrequest *dr;
 
         dbg("%s - port %d", __func__, port->number);
 
@@ -226,6 +271,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
         if (!buffer) {
                 dev_err(&port->dev, "out of memory\n");
                 count = -ENOMEM;
+
                 goto error_no_buffer;
         }
 
@@ -240,35 +286,28 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 
         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 
-        if (port->bulk_out_endpointAddress) {
-                usb_fill_bulk_urb(urb, serial->dev,
-                                  usb_sndbulkpipe(serial->dev,
-                                                  port->bulk_out_endpointAddress),
-                                  buffer, count, opticon_write_bulk_callback, priv);
-        } else {
-                struct usb_ctrlrequest *dr;
-
-                dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
-                if (!dr)
-                        return -ENOMEM;
-
-                dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT;
-                dr->bRequest = 0x01;
-                dr->wValue = 0;
-                dr->wIndex = 0;
-                dr->wLength = cpu_to_le16(count);
-
-                usb_fill_control_urb(urb, serial->dev,
-                        usb_sndctrlpipe(serial->dev, 0),
-                        (unsigned char *)dr, buffer, count,
-                        opticon_write_bulk_callback, priv);
-        }
+        /* The conncected devices do not have a bulk write endpoint,
+         * to transmit data to de barcode device the control endpoint is used */
+        dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
+        if (!dr)
+                return -ENOMEM;
+
+        dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT;
+        dr->bRequest = 0x01;
+        dr->wValue = 0;
+        dr->wIndex = 0;
+        dr->wLength = cpu_to_le16(count);
+
+        usb_fill_control_urb(urb, serial->dev,
+                usb_sndctrlpipe(serial->dev, 0),
+                (unsigned char *)dr, buffer, count,
+                opticon_write_control_callback, priv);
 
         /* send it down the pipe */
         status = usb_submit_urb(urb, GFP_ATOMIC);
         if (status) {
                 dev_err(&port->dev,
-                   "%s - usb_submit_urb(write bulk) failed with status = %d\n",
+                "%s - usb_submit_urb(write endpoint) failed status = %d\n",
                                                         __func__, status);
                 count = status;
                 goto error;
@@ -360,16 +399,49 @@ static int opticon_tiocmget(struct tty_struct *tty, struct file *file)
         int result = 0;
 
         dbg("%s - port %d", __func__, port->number);
+        if (!usb_get_intfdata(port->serial->interface))
+                return -ENODEV;
 
         spin_lock_irqsave(&priv->lock, flags);
         if (priv->rts)
-                result = TIOCM_RTS;
+                result |= TIOCM_RTS;
+        if (priv->cts)
+                result |= TIOCM_CTS;
         spin_unlock_irqrestore(&priv->lock, flags);
 
         dbg("%s - %x", __func__, result);
         return result;
 }
 
+static int opticon_tiocmset(struct tty_struct *tty, struct file *file,
+                           unsigned int set, unsigned int clear)
+{
+        struct usb_serial_port *port = tty->driver_data;
+        struct opticon_private *priv = usb_get_serial_data(port->serial);
+        unsigned long flags;
+        bool rts;
+        bool changed = false;
+
+        if (!usb_get_intfdata(port->serial->interface))
+                return -ENODEV;
+        /* We only support RTS so we only handle that */
+        spin_lock_irqsave(&priv->lock, flags);
+
+        rts = priv->rts;
+        if (set & TIOCM_RTS)
+                priv->rts = true;
+        if (clear & TIOCM_RTS)
+                priv->rts = false;
+        changed = rts ^ priv->rts;
+        spin_unlock_irqrestore(&priv->lock, flags);
+
+        if (!changed)
+                return 0;
+
+        /* Send the new RTS state to the connected device */
+        return send_control_msg(port, CONTROL_RTS, !rts);
+}
+
 static int get_serial_info(struct opticon_private *priv,
                            struct serial_struct __user *serial)
 {
@@ -431,6 +503,7 @@ static int opticon_startup(struct usb_serial *serial)
         priv->serial = serial;
         priv->port = serial->port[0];
         priv->udev = serial->dev;
+        priv->outstanding_urbs = 0;     /* Init the outstanding urbs */
 
         /* find our bulk endpoint */
         intf = serial->interface->altsetting;
@@ -456,13 +529,6 @@ static int opticon_startup(struct usb_serial *serial)
 
                 priv->bulk_address = endpoint->bEndpointAddress;
 
-                /* set up our bulk urb */
-                usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
-                                  usb_rcvbulkpipe(priv->udev,
-                                                  endpoint->bEndpointAddress),
-                                  priv->bulk_in_buffer, priv->buffer_size,
-                                  opticon_bulk_callback, priv);
-
                 bulk_in_found = true;
                 break;
                 }
@@ -558,6 +624,7 @@ static struct usb_serial_driver opticon_device = {
         .unthrottle =           opticon_unthrottle,
         .ioctl =                opticon_ioctl,
         .tiocmget =             opticon_tiocmget,
+        .tiocmset =             opticon_tiocmset,
 };
 
 static int __init opticon_init(void)
@@ -581,6 +648,7 @@ static void __exit opticon_exit(void)
 
 module_init(opticon_init);
 module_exit(opticon_exit);
+MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
 module_param(debug, bool, S_IRUGO | S_IWUSR);
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 5f46838dfee5..75c7f456eed5 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -652,7 +652,8 @@ static const struct usb_device_id option_ids[] = {
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0028, 0xff, 0xff, 0xff) },
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0029, 0xff, 0xff, 0xff) },
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0030, 0xff, 0xff, 0xff) },
-        { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, ZTE_PRODUCT_MF626, 0xff, 0xff, 0xff) },
+        { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, ZTE_PRODUCT_MF626, 0xff,
+          0xff, 0xff), .driver_info = (kernel_ulong_t)&four_g_w14_blacklist },
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0032, 0xff, 0xff, 0xff) },
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0033, 0xff, 0xff, 0xff) },
         { USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x0034, 0xff, 0xff, 0xff) },
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 0457813eebee..5b88b6836a81 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -376,7 +376,10 @@ static int sierra_send_setup(struct usb_serial_port *port)
         if (!do_send)
                 return 0;
 
-        usb_autopm_get_interface(serial->interface);
+        retval = usb_autopm_get_interface(serial->interface);
+        if (retval < 0)
+                return retval;
+
         retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
                 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
         usb_autopm_put_interface(serial->interface);
@@ -811,8 +814,12 @@ static void sierra_close(struct usb_serial_port *port)
                 mutex_lock(&serial->disc_mutex);
                 if (!serial->disconnected) {
                         serial->interface->needs_remote_wakeup = 0;
-                        usb_autopm_get_interface(serial->interface);
-                        sierra_send_setup(port);
+                        /* odd error handling due to pm counters */
+                        if (!usb_autopm_get_interface(serial->interface))
+                                sierra_send_setup(port);
+                        else
+                                usb_autopm_get_interface_no_resume(serial->interface);
+                                
                 }
                 mutex_unlock(&serial->disc_mutex);
                 spin_lock_irq(&intfdata->susp_lock);
@@ -865,7 +872,8 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
                 /* get rid of everything as in close */
                 sierra_close(port);
                 /* restore balance for autopm */
-                usb_autopm_put_interface(serial->interface);
+                if (!serial->disconnected)
+                        usb_autopm_put_interface(serial->interface);
                 return err;
         }
         sierra_send_setup(port);
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 546a52179bec..2ff90a9c8f47 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -911,9 +911,8 @@ int usb_serial_probe(struct usb_interface *interface,
                         dev_err(&interface->dev, "No free urbs available\n");
                         goto probe_error;
                 }
-                buffer_size = serial->type->bulk_in_size;
-                if (!buffer_size)
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                buffer_size = max_t(int, serial->type->bulk_in_size,
+                                le16_to_cpu(endpoint->wMaxPacketSize));
                 port->bulk_in_size = buffer_size;
                 port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
                 port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 9c014e2ecd68..eb95aecc0015 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -261,7 +261,8 @@ int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
                                 intfdata->in_flight--;
                                 spin_unlock_irqrestore(&intfdata->susp_lock,
                                                        flags);
-                                continue;
+                                usb_autopm_put_interface_async(port->serial->interface);
+                                break;
                         }
                 }
 
@@ -308,11 +309,16 @@ static void usb_wwan_indat_callback(struct urb *urb)
                 /* Resubmit urb so we continue receiving */
                 if (status != -ESHUTDOWN) {
                         err = usb_submit_urb(urb, GFP_ATOMIC);
-                        if (err && err != -EPERM)
-                                printk(KERN_ERR "%s: resubmit read urb failed. "
-                                       "(%d)", __func__, err);
-                        else
+                        if (err) {
+                                if (err != -EPERM) {
+                                        printk(KERN_ERR "%s: resubmit read urb failed. "
+                                                "(%d)", __func__, err);
+                                        /* busy also in error unless we are killed */
+                                        usb_mark_last_busy(port->serial->dev);
+                                }
+                        } else {
                                 usb_mark_last_busy(port->serial->dev);
+                        }
                 }
 
         }
@@ -421,6 +427,7 @@ int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
         spin_lock_irq(&intfdata->susp_lock);
         portdata->opened = 1;
         spin_unlock_irq(&intfdata->susp_lock);
+        /* this balances a get in the generic USB serial code */
         usb_autopm_put_interface(serial->interface);
 
         return 0;
@@ -447,7 +454,8 @@ void usb_wwan_close(struct usb_serial_port *port)
                         usb_kill_urb(portdata->in_urbs[i]);
                 for (i = 0; i < N_OUT_URB; i++)
                         usb_kill_urb(portdata->out_urbs[i]);
-                usb_autopm_get_interface(serial->interface);
+                /* balancing - important as an error cannot be handled*/
+                usb_autopm_get_interface_no_resume(serial->interface);
                 serial->interface->needs_remote_wakeup = 0;
         }
 }
@@ -661,6 +669,18 @@ int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
 }
 EXPORT_SYMBOL(usb_wwan_suspend);
 
+static void unbusy_queued_urb(struct urb *urb, struct usb_wwan_port_private *portdata)
+{
+        int i;
+
+        for (i = 0; i < N_OUT_URB; i++) {
+                if (urb == portdata->out_urbs[i]) {
+                        clear_bit(i, &portdata->out_busy);
+                        break;
+                }
+        }
+}
+
 static void play_delayed(struct usb_serial_port *port)
 {
         struct usb_wwan_intf_private *data;
@@ -672,8 +692,17 @@ static void play_delayed(struct usb_serial_port *port)
         data = port->serial->private;
         while ((urb = usb_get_from_anchor(&portdata->delayed))) {
                 err = usb_submit_urb(urb, GFP_ATOMIC);
-                if (!err)
+                if (!err) {
                         data->in_flight++;
+                } else {
+                        /* we have to throw away the rest */
+                        do {
+                                unbusy_queued_urb(urb, portdata);
+                                //extremely dirty
+                                atomic_dec(&port->serial->interface->dev.power.usage_count);
+                        } while ((urb = usb_get_from_anchor(&portdata->delayed)));
+                        break;
+                }
         }
 }