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path: root/drivers/usb/serial
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2016-10-21USB: serial: fix potential NULL-dereference at probeJohan Hovold
Make sure we have at least one port before attempting to register a console. Currently, at least one driver binds to a "dummy" interface and requests zero ports for it. Should such an interface also lack endpoints, we get a NULL-deref during probe. Fixes: e5b1e2062e05 ("USB: serial: make minor allocation dynamic") Cc: stable <stable@vger.kernel.org> # 3.11 Signed-off-by: Johan Hovold <johan@kernel.org>
2016-10-20USB: serial: cp210x: fix tiocmget error handlingJohan Hovold
The current tiocmget implementation would fail to report errors up the stack and instead leaked a few bits from the stack as a mask of modem-status flags. Fixes: 39a66b8d22a3 ("[PATCH] USB: CP2101 Add support for flow control") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-10-17USB: serial: ftdi_sio: add support for Infineon TriBoard TC2X7Stefan Tauner
This adds support to ftdi_sio for the Infineon TriBoard TC2X7 engineering board for first-generation Aurix SoCs with Tricore CPUs. Mere addition of the device IDs does the job. Signed-off-by: Stefan Tauner <stefan.tauner@technikum-wien.at> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-09-27USB: serial: cp210x: Add ID for a Juniper consoleKyle Jones
Signed-off-by: Kyle Jones <kyle@kf5jwc.us> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-19Merge 4.8-rc7 into usb-nextGreg Kroah-Hartman
We want/need the USB fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-16Merge tag 'usb-serial-4.9-rc1' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-next Johan writes: USB-serial updates for v4.9-rc1 More clean ups, including a second set of changes from Mathieu as part of a major overhaul of the ti_usb_3410_5052 driver. Signed-off-by: Johan Hovold <johan@kernel.org>
2016-09-12USB: serial: simple: add support for another Infineon flashloaderDaniele Palmas
This patch adds support for Infineon flashloader 0x8087/0x0801. The flashloader is used in Telit LE940B modem family with Telit flashing application. Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-24USB: serial: option: add WeTelecom 0x6802 and 0x6803 productsAleksandr Makarov
These product IDs are listed in Windows driver. 0x6803 corresponds to WeTelecom WM-D300. 0x6802 name is unknown. Signed-off-by: Aleksandr Makarov <aleksandr.o.makarov@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-23USB: serial: ti_usb_3410_5052: remove unused variablesMathieu OTHACEHE
Remove variables affected but never read. Also drop the now unused TI_SET_SERIAL_FLAGS define. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [ johan: drop TI_SET_SERIAL_FLAGS ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-23USB: serial: ti_usb_3410_5052: use C_X macrosMathieu OTHACEHE
Use C_X tty.h macros to avoid direct manipulation of termios c_cflag variable. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-23USB: serial: ti_usb_3410_5052: remove useless NULL-testingMathieu OTHACEHE
It is useless to check the return of usb_get_serial_port_data in the tty and tty-port callbacks. No need to check interface private data in close() either. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [ johan: amend commit message ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-23USB: serial: ti_usb_3410_5052: remove useless dev_dbg messagesMathieu OTHACEHE
Remove useless or redundant dev_dbg messages. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [ johan: drop an unrelated change ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-23USB: serial: ti_usb_3410_5052: do not use __uX typesMathieu OTHACEHE
__uX types should only be used for user-space interactions. Also clean up uart-config endianess handling, and drop some redundant casts. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [ johan: amend commit message ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-22USB: serial: use IS_ENABLED() instead of checking for built-in or moduleJavier Martinez Canillas
The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either built-in or as a module, use that macro instead of open coding the same. Using the macro makes the code more readable by helping abstract away some of the Kconfig built-in and module enable details. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-20USB: serial: option: add WeTelecom WM-D200Aleksandr Makarov
Add support for WeTelecom WM-D200. T: Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=22de ProdID=6801 Rev=00.00 S: Manufacturer=WeTelecom Incorporated S: Product=WeTelecom Mobile Products C: #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) I: If#= 3 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage Signed-off-by: Aleksandr Makarov <aleksandr.o.makarov@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-15USB: serial: mos7840: fix non-atomic allocation in write pathAlexey Khoroshilov
There is an allocation with GFP_KERNEL flag in mos7840_write(), while it may be called from interrupt context. Follow-up for commit 191252837626 ("USB: kobil_sct: fix non-atomic allocation in write path") Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-15USB: serial: mos7720: fix non-atomic allocation in write pathAlexey Khoroshilov
There is an allocation with GFP_KERNEL flag in mos7720_write(), while it may be called from interrupt context. Follow-up for commit 191252837626 ("USB: kobil_sct: fix non-atomic allocation in write path") Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-08USB: serial: fix memleak in driver-registration error pathAlexey Klimov
udriver struct allocated by kzalloc() will not be freed if usb_register() and next calls fail. This patch fixes this by adding one more step with kfree(udriver) in error path. Signed-off-by: Alexey Klimov <klimov.linux@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-08USB: serial: option: add support for Telit LE920A4Daniele Palmas
This patch adds a set of compositions for Telit LE920A4. Compositions in short are: 0x1207: tty + tty 0x1208: tty + adb + tty + tty 0x1211: tty + adb + ecm 0x1212: tty + adb 0x1213: ecm + tty 0x1214: tty + adb + ecm + tty telit_le922_blacklist_usbcfg3 is reused for compositions 0x1211 and 0x1214 due to the same interfaces positions. Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-08USB: serial: ftdi_sio: add device ID for WICED USB UART dev boardSheng-Hui J. Chu
BCM20706V2_EVAL is a WICED dev board designed with FT2232H USB 2.0 UART/FIFO IC. To support BCM920706V2_EVAL dev board for WICED development on Linux. Add the VID(0a5c) and PID(6422) to ftdi_sio driver to allow loading ftdi_sio for this board. Signed-off-by: Sheng-Hui J. Chu <s.jeffrey.chu@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-08USB: serial: ftdi_sio: add PIDs for Ivium Technologies devicesRobert Deliën
Ivium Technologies uses the FTDI VID with custom PIDs for their line of electrochemical interfaces and the PalmSens they developed for PalmSens BV. Signed-off-by: Robert Delien <robert@delien.nl> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-08-08USB: serial: option: add D-Link DWM-156/A3Lubomir Rintel
The device has four interfaces; the three serial ports ought to be handled by this driver: 00 Diagnostic interface serial port 01 NMEA device serial port 02 Mass storage (sd card) 03 Modem serial port The other product ids listed in the Windows driver are present already. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-16USB: serial: use variable for statusOliver Neukum
This patch turns status in a variable read once from the URB. The long term plan is to deliver status to the callback. In addition it makes the code a bit more elegant. Signed-off-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-16USB: serial: option: add support for Telit LE910 PID 0x1206Daniele Palmas
This patch adds support for 0x1206 PID of Telit LE910. Since the interfaces positions are the same than the ones for 0x1043 PID of Telit LE922, telit_le922_blacklist_usbcfg3 is used. Signed-off-by: Daniele Palmas <dnlplm@gmail.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-15USB: serial: cp210x: use kmemdupMuhammad Falak R Wani
Use kmemdup when some other buffer is immediately copied into allocated region. It replaces call to allocation followed by memcpy, by a single call to kmemdup. Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-15USB: serial: ti_usb_3410_5052: use functions rather than macrosMathieu OTHACEHE
Functions are preferable to macros resembling functions. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [johan: drop inline keyword, move above calling function ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-15USB: serial: ti_usb_3410_5052: remove ti_usb_3410_5052.hMathieu OTHACEHE
The definitions in ti_usb_3410_5052.h are only used in ti_usb_3410_5052.c. The content of the header is copied in ti_usb_3410_5052.c. Also correct a typo in macro TI_PIPE_MODE_CONTINOUS. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [johan: actually remove the header file ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-15USB: serial: ti_usb_3410_5052: use __packedMathieu OTHACEHE
__packed is preferred over __attribute__((packed)) for portability. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-07-15USB: serial: ti_usb_3410_5052: remove useless commentsMathieu OTHACEHE
Remove lines commenting the obvious. Remove vi related comment. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-06-07USB: mos7720: delete parportSudip Mukherjee
parport subsystem has introduced parport_del_port() to delete a port when it is going away. Without parport_del_port() the registered port will not be unregistered. To reproduce and verify the error: Command to be used is : ls /sys/bus/parport/devices 1) without the device attached there is no output as there is no registered parport. 2) Attach the device, and the command will show "parport0". 3) Remove the device and the command still shows "parport0". 4) Attach the device again and we get "parport1". With the patch applied: 1) without the device attached there is no output as there is no registered parport. 2) Attach the device, and the command will show "parport0". 3) Remove the device and there is no output as "parport0" is now removed. 4) Attach device again to get "parport0" again. Cc: <stable@vger.kernel.org> # 4.2+ Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-20Merge tag 'usb-4.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB updates from Greg KH: "Here's the big pull request for USB and PHY drivers for 4.7-rc1 Full details in the shortlog, but it's the normal major gadget driver updates, phy updates, new usbip code, as well as a bit of lots of other stuff. All have been in linux-next with no reported issues" * tag 'usb-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (164 commits) USB: serial: ti_usb_3410_5052: add MOXA UPORT 11x0 support USB: serial: fix minor-number allocation USB: serial: quatech2: fix use-after-free in probe error path USB: serial: mxuport: fix use-after-free in probe error path USB: serial: keyspan: fix debug and error messages USB: serial: keyspan: fix URB unlink USB: serial: keyspan: fix use-after-free in probe error path USB: serial: io_edgeport: fix memory leaks in probe error path USB: serial: io_edgeport: fix memory leaks in attach error path usb: Remove unnecessary space before operator ','. usb: Remove unnecessary space before open square bracket. USB: FHCI: avoid redundant condition usb: host: xhci-rcar: Avoid long wait in xhci_reset() usb/host/fotg210: remove dead code in create_sysfs_files usb: wusbcore: Do not initialise statics to 0. usb: wusbcore: Remove space before ',' and '(' . USB: serial: cp210x: clean up CRTSCTS flag code USB: serial: cp210x: get rid of magic numbers in CRTSCTS flag code USB: serial: cp210x: fix hardware flow-control disable USB: serial: option: add even more ZTE device ids ...
2016-05-14Merge tag 'usb-serial-4.7-rc1' of ↵Greg Kroah-Hartman
git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-next Johan writes: USB-serial updates for v4.7-rc1 These updates fixes a number of issues where resources were not properly released on probe errors. Included is also a fix for hardware flow-control disable for cp210x. Support for Moxa UPort 11x0 is added to the ti_usb_3410_5052 driver, and included are also some general code clean ups. Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-11USB: serial: ti_usb_3410_5052: add MOXA UPORT 11x0 supportMathieu OTHACEHE
Add support for : - UPort 1110 : 1 port RS-232 USB to Serial Hub. - UPort 1130 : 1 port RS-422/485 USB to Serial Hub. - UPort 1130I : 1 port RS-422/485 USB to Serial Hub with Isolation. - UPort 1150 : 1 port RS-232/422/485 USB to Serial Hub. - UPort 1150I : 1 port RS-232/422/485 USB to Serial Hub with Isolation. These devices are based on TI 3410 chip. Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com> [johan: fix rs485-only check ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-10USB: serial: fix minor-number allocationJohan Hovold
Due to a missing upper bound, invalid minor numbers could be assigned to ports. Such devices would later fail to register, but let's catch this early as intended and avoid having devices with only a subset of their ports registered (potentially the empty set). Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: quatech2: fix use-after-free in probe error pathJohan Hovold
The interface read URB is submitted in attach, but was only unlinked by the driver at disconnect. In case of a late probe error (e.g. due to failed minor allocation), disconnect is never called and we would end up with active URBs for an unbound interface. This in turn could lead to deallocated memory being dereferenced in the completion callback. Fixes: f7a33e608d9a ("USB: serial: add quatech2 usb to serial driver") Cc: stable <stable@vger.kernel.org> # v3.5: 40d04738491d Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: mxuport: fix use-after-free in probe error pathJohan Hovold
The interface read and event URBs are submitted in attach, but were never explicitly unlinked by the driver. Instead the URBs would have been killed by usb-serial core on disconnect. In case of a late probe error (e.g. due to failed minor allocation), disconnect is never called and we could end up with active URBs for an unbound interface. This in turn could lead to deallocated memory being dereferenced in the completion callbacks. Fixes: ee467a1f2066 ("USB: serial: add Moxa UPORT 12XX/14XX/16XX driver") Cc: stable <stable@vger.kernel.org> # v3.14 Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: keyspan: fix debug and error messagesJohan Hovold
The URB status is signed and should be printed using %d rather than %x. Also print endpoint addresses consistently using %x rather than %d, and merge a broken-up error message string. Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: keyspan: fix URB unlinkJohan Hovold
A driver must not rely on the URB status field to try to determine if an URB is active. Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: keyspan: fix use-after-free in probe error pathJohan Hovold
The interface instat and indat URBs were submitted in attach, but never unlinked in release before deallocating the corresponding transfer buffers. In the case of a late probe error (e.g. due to failed minor allocation), disconnect would not have been called before release, causing the buffers to be freed while the URBs are still in use. We'd also end up with active URBs for an unbound interface. Fixes: f9c99bb8b3a1 ("USB: usb-serial: replace shutdown with disconnect, release") Cc: stable <stable@vger.kernel.org> # v2.6.31 Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: io_edgeport: fix memory leaks in probe error pathJohan Hovold
URBs and buffers allocated in attach for Epic devices would never be deallocated in case of a later probe error (e.g. failure to allocate minor numbers) as disconnect is then never called. Fix by moving deallocation to release and making sure that the URBs are first unlinked. Fixes: f9c99bb8b3a1 ("USB: usb-serial: replace shutdown with disconnect, release") Cc: stable <stable@vger.kernel.org> # v2.6.31 Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-10USB: serial: io_edgeport: fix memory leaks in attach error pathJohan Hovold
Private data, URBs and buffers allocated for Epic devices during attach were never released on errors (e.g. missing endpoints). Fixes: 6e8cf7751f9f ("USB: add EPIC support to the io_edgeport driver") Cc: stable <stable@vger.kernel.org> # v2.6.21 Signed-off-by: Johan Hovold <johan@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09Merge 4.6-rc7 into tty-nextGreg Kroah-Hartman
We want the pty fixes in here as well so that patches can build on it. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-09Merge 4.6-rc7 into usb-nextGreg Kroah-Hartman
We want the USB fixes in here to resolve merge issues and make it easier for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-05USB: serial: cp210x: clean up CRTSCTS flag codeKonstantin Shkolnyy
The CRTSCTS flag code cleared (and inconsistently) bits unrelated to CRTSCTS functionality. It was also harder than necessary to read. Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-05USB: serial: cp210x: get rid of magic numbers in CRTSCTS flag codeKonstantin Shkolnyy
Replaced magic numbers used in the CRTSCTS flag code with symbolic names from the chip specification. Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-05USB: serial: cp210x: fix hardware flow-control disableKonstantin Shkolnyy
A bug in the CRTSCTS handling caused RTS to alternate between CRTSCTS=0 => "RTS is transmit active signal" and CRTSCTS=1 => "RTS is used for receive flow control" instead of CRTSCTS=0 => "RTS is statically active" and CRTSCTS=1 => "RTS is used for receive flow control" This only happened after first having enabled CRTSCTS. Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> Fixes: 39a66b8d22a3 ("[PATCH] USB: CP2101 Add support for flow control") Cc: stable <stable@vger.kernel.org> [johan: reword commit message ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-04USB: serial: option: add even more ZTE device idsLei Liu
Add even more ZTE device ids. Signed-off-by: lei liu <liu.lei78@zte.com.cn> Cc: stable <stable@vger.kernel.org> [johan: rebase and replace commit message ] Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-04USB: serial: option: add more ZTE device idslei liu
More ZTE device ids. Signed-off-by: lei liu <liu.lei78@zte.com.cn> Cc: stable <stable@vger.kernel.org> [properly sort them - gregkh] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-05-03USB: serial: option: add support for Cinterion PH8 and AHxxSchemmel Hans-Christoph
Added support for Gemalto's Cinterion PH8 and AHxx products with 2 RmNet Interfaces and products with 1 RmNet + 1 USB Audio interface. In addition some minor renaming and formatting. Signed-off-by: Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> [johan: sort current entries and trim trailing whitespace ] Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
2016-04-30tty: Replace ASYNC_INITIALIZED bit and update atomicallyPeter Hurley
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers tty_port_set_initialized() and tty_port_initialized() to abstract atomic bit ops. Note: the transforms for test_and_set_bit() and test_and_clear_bit() are unnecessary as the state transitions are already mutually exclusive; the tty lock prevents concurrent open/close/hangup. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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