diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/qcserial.c | 49 |
1 files changed, 16 insertions, 33 deletions
diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c index 996015c5f1a..74e0b132af3 100644 --- a/drivers/usb/serial/qcserial.c +++ b/drivers/usb/serial/qcserial.c @@ -127,6 +127,7 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id) __u8 nintf; __u8 ifnum; bool is_gobi1k = id->driver_info ? true : false; + int altsetting = -1; dev_dbg(dev, "Is Gobi 1000 = %d\n", is_gobi1k); @@ -160,15 +161,7 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id) retval = 0; /* Success */ break; } - - retval = usb_set_interface(serial->dev, ifnum, 1); - if (retval < 0) { - dev_err(dev, - "Could not set interface, error %d\n", - retval); - retval = -ENODEV; - kfree(data); - } + altsetting = 1; } break; @@ -193,24 +186,10 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id) if (ifnum == 1 && !is_gobi1k) { dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n"); - retval = usb_set_interface(serial->dev, ifnum, 0); - if (retval < 0) { - dev_err(dev, - "Could not set interface, error %d\n", - retval); - retval = -ENODEV; - kfree(data); - } + altsetting = 0; } else if (ifnum == 2) { dev_dbg(dev, "Modem port found\n"); - retval = usb_set_interface(serial->dev, ifnum, 0); - if (retval < 0) { - dev_err(dev, - "Could not set interface, error %d\n", - retval); - retval = -ENODEV; - kfree(data); - } + altsetting = 0; } else if (ifnum==3 && !is_gobi1k) { /* * NMEA (serial line 9600 8N1) @@ -218,14 +197,7 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id) * # echo "\$GPS_STOP" > /dev/ttyUSBx */ dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n"); - retval = usb_set_interface(serial->dev, ifnum, 0); - if (retval < 0) { - dev_err(dev, - "Could not set interface, error %d\n", - retval); - retval = -ENODEV; - kfree(data); - } + altsetting = 0; } break; @@ -235,6 +207,17 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id) retval = -ENODEV; } + if (altsetting >= 0) { + retval = usb_set_interface(serial->dev, ifnum, altsetting); + if (retval < 0) { + dev_err(dev, + "Could not set interface, error %d\n", + retval); + retval = -ENODEV; + kfree(data); + } + } + /* Set serial->private if not returning -ENODEV */ if (retval != -ENODEV) usb_set_serial_data(serial, data); |