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path: root/drivers/usb/serial
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2013-06-24USB: option,qcserial: move Novatel Gobi1K IDs to qcserialDan Williams
These devices are all Gobi1K devices (according to the Windows INF files) and should be handled by qcserial instead of option. Their network port is handled by qmi_wwan. Signed-off-by: Dan Williams <dcbw@redhat.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-24Merge 3.10-rc7 into usb-nextGreg Kroah-Hartman
We want the USB fixes and other good stuff in this branch as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-19USB: serial: ti_usb_3410_5052: new device id for Abbot strip port cableAnders Hammarquist
Add product id for Abbott strip port cable for Precision meter which uses the TI 3410 chip. Signed-off-by: Anders Hammarquist <iko@iko.pp.se> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17USB: serial: increase the number of devices we supportGreg Kroah-Hartman
We had the limit of 255 USB to serial devices on one system for almost 15 years, with no complaints. But now it's time to move on from these tiny "baby" systems, and bump the number up to 512, which should last us a few more years: "512 is a nice number" -- Tobias Winter Note, this is still a static value, and uses up tty core memory with this many tty devices allocated. Converting the driver to use TTY_DRIVER_DYNAMIC_DEV is the next thing to do in order to remove this limitation. Reported-by: Tobias Winter <tobias@linuxdingsda.de> Tested-by: Tobias Winter <tobias@linuxdingsda.de> Reviewed-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17USB: serial: make minor allocation dynamicGreg Kroah-Hartman
This moves the allocation of minor device numbers from a static array to be dynamic, using the idr interface. This means that you could potentially get "gaps" in a minor number range for a single USB serial device with multiple ports, but all should still work properly. We remove the 'minor' field from the usb_serial structure, as it no longer makes any sense for it (use the field in the usb_serial_port structure if you really want to know this number), and take the fact that we were overloading a number in this field to determine if we had initialized the minor numbers or not, and just use a flag variable instead. Note, we still have the limitation of 255 USB to serial devices in the system, as that is all we are registering with the TTY layer at this point in time. Tested-by: Tobias Winter <tobias@linuxdingsda.de> Reviewed-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17Merge 3.10-rc6 into usb-nextGreg Kroah-Hartman
We want the fixes in this branch as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-10USB: serial: ports: add minor and port numberGreg Kroah-Hartman
The usb_serial_port structure had the number field, which was the minor number for the port, which almost no one really cared about. They really wanted the number of the port within the device, which you had to subtract from the minor of the parent usb_serial_device structure. To clean this up, provide the real minor number of the port, and the number of the port within the serial device separately, as these numbers might not be related in the future. Bonus is that this cleans up a lot of logic in the drivers, and saves lines overall. Tested-by: Tobias Winter <tobias@linuxdingsda.de> Reviewed-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -- drivers/staging/serqt_usb2/serqt_usb2.c | 21 +++-------- drivers/usb/serial/ark3116.c | 2 - drivers/usb/serial/bus.c | 6 +-- drivers/usb/serial/console.c | 2 - drivers/usb/serial/cp210x.c | 2 - drivers/usb/serial/cypress_m8.c | 4 +- drivers/usb/serial/digi_acceleport.c | 6 --- drivers/usb/serial/f81232.c | 5 +- drivers/usb/serial/garmin_gps.c | 6 +-- drivers/usb/serial/io_edgeport.c | 58 ++++++++++++-------------------- drivers/usb/serial/io_ti.c | 21 ++++------- drivers/usb/serial/keyspan.c | 29 +++++++--------- drivers/usb/serial/metro-usb.c | 4 +- drivers/usb/serial/mos7720.c | 37 +++++++++----------- drivers/usb/serial/mos7840.c | 52 +++++++++------------------- drivers/usb/serial/opticon.c | 2 - drivers/usb/serial/pl2303.c | 2 - drivers/usb/serial/quatech2.c | 7 +-- drivers/usb/serial/sierra.c | 2 - drivers/usb/serial/ti_usb_3410_5052.c | 10 ++--- drivers/usb/serial/usb-serial.c | 7 ++- drivers/usb/serial/usb_wwan.c | 2 - drivers/usb/serial/whiteheat.c | 20 +++++------ include/linux/usb/serial.h | 6 ++- 24 files changed, 133 insertions(+), 180 deletions(-)
2013-06-10USB: pl2303: fix device initialisation at openJohan Hovold
Do not use uninitialised termios data to determine when to configure the device at open. This also prevents stack data from leaking to userspace in the OOM error path. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-10USB: spcp8x5: fix device initialisation at openJohan Hovold
Do not use uninitialised termios data to determine when to configure the device at open. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-10USB: f81232: fix device initialisation at openJohan Hovold
Do not use uninitialised termios data to determine when to configure the device at open. This also prevents stack data from leaking to userspace. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-09Merge 3.10-rc5 into usb-nextGreg Kroah-Hartman
We need the changes in this branch. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-06USB: option,zte_ev: move most ZTE CDMA devices to zte_evDan Williams
Per some ZTE Linux drivers I found for the AC2716, the following patch moves most ZTE CDMA devices from option to zte_ev. The blacklist stuff that option does is not required with zte_ev, because it doesn't implement any of the send_setup hooks which the blacklist suppressed. I did not move the 2718 over because I could not find any ZTE Linux drivers for that device, nor even any Windows drivers. Signed-off-by: Dan Williams <dcbw@redhat.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-06USB: option: blacklist network interface on Huawei E1820Bjørn Mork
The mode used by Windows for the Huawei E1820 will use the same ff/ff/ff class codes for both serial and network functions. Reported-by: Graham Inggs <graham.inggs@uct.ac.za> Signed-off-by: Bjørn Mork <bjorn@mork.no> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-06USB: whiteheat: fix broken port configurationJohan Hovold
When configuring the port (e.g. set_termios) the port minor number rather than the port number was used in the request (and they only coincide for minor number 0). Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-05USB: serial: fix TIOCMIWAIT return valueJohan Hovold
Fix regression introduced by commit 143d9d9616 ("USB: serial: add tiocmiwait subdriver operation") which made the ioctl operation return ENODEV rather than ENOIOCTLCMD when a subdriver TIOCMIWAIT implementation is missing. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-04USB: mos7720: fix hardware flow controlJohan Hovold
The register access to enable hardware flow control depends on the device port number and not the port minor number. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-04USB: keyspan: remove unused endpoint-array accessJohan Hovold
Remove the no longer used endpoint-array access completely. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-04USB: keyspan: fix bogus array indexJohan Hovold
The outcont_endpoints array was indexed using the port minor number (which can be greater than the array size) rather than the device port number. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-04USB: zte_ev: fix broken openJohan Hovold
Remove bogus port-number check in open and close, which prevented this driver from being used with a minor number different from zero. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-03USB: serial: pl2303 works at 500kbpsLuca Olivetti
My PL2303HX works at 500kbps after applying this patch. I suppose that it could work at other non standard speeds since this fix "correctly handle baudrates above 115200" https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/serial/pl2303.c?id=8d48fdf689fed2c73c493e5146d1463689246442 came after this one "fix baud rate handling in case of unsupported values" https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/serial/pl2303.c?id=25b8286805e856c8c7fda127018e31032c918015 but I only can test it with 500000. Patch made against mainline but tested with 3.4.45 Signed-off-by: Luca Olivetti <luca@ventoso.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-03USB: serial: add support Infineon modem USB flashloader driverWei Shuai
If you want to download Infineon modem via USB, this Infineon USB flashloader driver is required. Signed-off-by: Wei Shuai <cpuwolf@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-03USB: serial: Add Option GTM681W to qcserial device table.Richard Weinberger
The Option GTM681W uses a qualcomm chip and can be served by the qcserial device driver. Signed-off-by: Richard Weinberger <richard@nod.at> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-03USB: Serial: cypress_M8: Enable FRWD Dongle hidcom deviceRobert Butora
The patch adds a new HIDCOM device and does not affect other devices driven by the cypress_M8 module. Changes are: - add VendorID ProductID to device tables - skip unstable speed check because FRWD uses 115200bps - skip reset at probe which is an issue workaround for this particular device. Signed-off-by: Robert Butora <robert.butora.fi@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-30usb: serial: dump small buffers with help of %*phAndy Shevchenko
There is a specifier we may use to dump small buffers. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: zte_ev: fix control-message timeoutsJohan Hovold
The control-message timeout is specified in milliseconds and should not depend on HZ. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: mos7720: fix message timeoutsJohan Hovold
The control and bulk-message timeouts are specified in milliseconds and should not depend on HZ. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: iuu_phoenix: fix bulk-message timeoutJohan Hovold
The bulk-message timeout is specified in milliseconds and should not depend on HZ. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: ark3116: fix control-message timeoutJohan Hovold
The control-message timeout is specified in milliseconds and should not depend on HZ. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: mos7840: fix DMA to stackJohan Hovold
Fix regression introduced by commit 0eafe4de1a ("USB: serial: mos7840: add support for MCS7810 devices") which used stack-allocated buffers for control messages. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: mos7720: fix DMA to stackJohan Hovold
The read_mos_reg function is called with stack-allocated buffers, which must not be used for control messages. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: visor: fix initialisation of Treo/Kyocera devicesJohan Hovold
Fix regression introduced by commit 214916f2e ("USB: visor: reimplement using generic framework") which broke initialisation of Treo/Kyocera devices that re-mapped bulk-in endpoints. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-29USB: serial: fix Treo/Kyocera interrrupt-in urb contextJohan Hovold
The first and second interrupt-in urbs are swapped for some Treo/Kyocera devices, but the urb context was never updated with the new port. Cc: stable@vger.kernel.org Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-27Merge 3.10-rc3 into usb-nextGreg Kroah-Hartman
We want these fixes. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: ftdi_sio: Add support for Newport CONEX motor driversGomella, Andrew (NIH/NHLBI) [F]
Here are two more devices that use FTDI USB-to-serial chips with new product ID's. The devices are the Newport Conex-AGP and Conex-CC motor controllers. (http://www.newport.com/CONEX-AGP-Integrated-Piezo-Motor-Rotation-Stages-/987623/1033/info.aspx) (http://www.newport.com/CONEX-CC-DC-Servo-Controller-Actuators/934114/1033/info.aspx) usb-devices command yields: P: Vendor=104d ProdID=3002 Rev=06.00 S: Manufacturer=Newport S: Product=CONEX-CC as well as P: Vendor=104d ProdID=3006 Rev=06.00 S: Manufacturer=Newport S: Product=CONEX-AGP Signed-off-by: Andrew Gomella <andrew.gomella@nih.gov> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: option: add device IDs for Dell 5804 (Novatel E371) WWAN cardDan Williams
A rebranded Novatel E371 for AT&T's LTE bands. Cc: stable <stable@vger.kernel.org> Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: quatech2: Staticize local symbolSachin Kamat
'qt2_process_read_urb' is referenced only in this file. Make it static. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: serial: clean up chars_in_bufferJohan Hovold
No need to grab disconnect mutex in chars_in_buffer now that no sub-driver is or should be querying hardware buffers anymore. (They should use wait_until_sent.) Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: ti_usb_3410_5052: fix chars_in_buffer overheadJohan Hovold
Use the new generic usb-serial wait_until_sent implementation to wait for hardware buffers to drain. This removes the need to check the hardware buffers in chars_in_buffer and thus removes the overhead introduced by commit 2c992cd73 ("USB: ti_usb_3410_5052: query hardware-buffer status in chars_in_buffer") without breaking tty_wait_until_sent (used by, for example, tcdrain, tcsendbreak and close). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: io_ti: fix chars_in_buffer overheadJohan Hovold
Use the new generic usb-serial wait_until_sent implementation to wait for hardware buffers to drain. This removes the need to check the hardware buffers in chars_in_buffer and thus removes the overhead introduced by commit 263e1f9f ("USB: io_ti: query hardware-buffer status in chars_in_buffer") without breaking tty_wait_until_sent (used by, for example, tcdrain, tcsendbreak and close). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: ftdi_sio: fix chars_in_buffer overheadJohan Hovold
Use the new generic usb-serial wait_until_sent implementation to wait for hardware buffers to drain. This removes the need to check the hardware buffers in chars_in_buffer and thus removes the overhead introduced by commit 6f602912 ("usb: serial: ftdi_sio: Add missing chars_in_buffer function") without breaking tty_wait_until_sent (used by, for example, tcdrain, tcsendbreak and close). Reported-by: Stas Sergeev <stsp@list.ru> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: ftdi_sio: clean up get_modem_statusJohan Hovold
Use usb-serial port rather than tty as argument to get_modem_status. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: serial: add generic wait_until_sent implementationJohan Hovold
Add generic wait_until_sent implementation which polls for empty hardware buffers using the new port-operation tx_empty. The generic implementation will be used for all sub-drivers that implement tx_empty but does not define wait_until_sent. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: serial: add wait_until_sent operationJohan Hovold
Add wait_until_sent operation which can be used to wait for hardware buffers to drain. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17USB: Blacklisted Cinterion's PLxx WWAN InterfaceSchemmel Hans-Christoph
/drivers/usb/serial/option.c: Blacklisted Cinterion's PLxx WWAN Interface (USB Interface 4), because it will be handled by QMI WWAN driver. Product IDs renamed. Signed-off-by: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-17usb: option: Add Telewell TW-LTE 4GTeppo Kotilainen
Information from driver description files: diag: VID_19D2&PID_0412&MI_00 nmea: VID_19D2&PID_0412&MI_01 at: VID_19D2&PID_0412&MI_02 modem: VID_19D2&PID_0412&MI_03 net: VID_19D2&PID_0412&MI_04 Signed-off-by: Teppo Kotilainen <qubit303@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-29Merge tag 'usb-3.10-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB patches from Greg Kroah-Hartman: "Here's the big USB pull request for 3.10-rc1. Lots of USB patches here, the majority being USB gadget changes and USB-serial driver cleanups, the rest being ARM build fixes / cleanups, and individual driver updates. We also finally got some chipidea fixes, which have been delayed for a number of kernel releases, as the maintainer has now reappeared. All of these have been in linux-next for a while" * tag 'usb-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (568 commits) USB: ehci-msm: USB_MSM_OTG needs USB_PHY USB: OHCI: avoid conflicting platform drivers USB: OMAP: ISP1301 needs USB_PHY USB: lpc32xx: ISP1301 needs USB_PHY USB: ftdi_sio: enable two UART ports on ST Microconnect Lite usb: phy: tegra: don't call into tegra-ehci directly usb: phy: phy core cannot yet be a module USB: Fix initconst in ehci driver usb-storage: CY7C68300A chips do not support Cypress ATACB USB: serial: option: Added support Olivetti Olicard 145 USB: ftdi_sio: correct ST Micro Connect Lite PIDs ARM: mxs_defconfig: add CONFIG_USB_PHY ARM: imx_v6_v7_defconfig: add CONFIG_USB_PHY usb: phy: remove exported function from __init section usb: gadget: zero: put function instances on unbind usb: gadget: f_sourcesink.c: correct a copy-paste misnomer usb: gadget: cdc2: fix error return code in cdc_do_config() usb: gadget: multi: fix error return code in rndis_do_config() usb: gadget: f_obex: fix error return code in obex_bind() USB: storage: convert to use module_usb_driver() ...
2013-04-24USB: ftdi_sio: enable two UART ports on ST Microconnect LiteAdrian Thomasset
The FT4232H used in the ST Micro Connect Lite has four hi-speed UART ports. The first two ports are reserved for the JTAG interface. We enable by default ports 2 and 3 as UARTs (where port 2 is a conventional RS-232 UART) Signed-off-by: Adrian Thomasset <adrian.thomasset@st.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-23USB: serial: option: Added support Olivetti Olicard 145Filippo Turato
This adds PID for Olivetti Olicard 145 in option.c Signed-off-by: Filippo Turato <nnj7585@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-23USB: ftdi_sio: correct ST Micro Connect Lite PIDsAdrian Thomasset
The current ST Micro Connect Lite uses the FT4232H hi-speed quad USB UART FTDI chip. It is also possible to drive STM reference targets populated with an on-board JTAG debugger based on the FT2232H chip with the same STMicroelectronics tools. For this reason, the ST Micro Connect Lite PIDs should be ST_STMCLT_2232_PID: 0x3746 ST_STMCLT_4232_PID: 0x3747 Signed-off-by: Adrian Thomasset <adrian.thomasset@st.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-19USB: ti_usb_3410_5052: kill custom closing_waitJohan Hovold
Kill custom closing_wait implementation and let the tty-layer handle it instead. Note that the port drain-delay is set to three characters to keep the 20ms delay after wait_until_sent at low baudrates (1200 baud) during close. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>