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2013-03-25USB: mos7720: always disable uart on closeJohan Hovold1-10/+3
Always try to disable the uart on close. Since the switch to tty ports, close will be called as part of shutdown before disconnect returns. Hence there is no need to check the disconnected flag, and we can put devices in disabled states also on driver unbind. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: metro-usb: always disable uart on closeJohan Hovold1-4/+1
Always try to disable the uart on close. Since the switch to tty ports, close will be called as part of shutdown before disconnect returns. Hence there is no need to check the disconnected flag, and we can put devices in disabled states also on driver unbind. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: kl5kusb105: always disable uart on closeJohan Hovold1-16/+11
Always try to disable the uart on close. Since the switch to tty ports, close will be called as part of shutdown before disconnect returns. Hence there is no need to check the disconnected flag, and we can put devices in disabled states also on driver unbind. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: io_ti: always disable uart on closeJohan Hovold1-13/+2
Always try to disable the uart on close. Since the switch to tty ports, close will be called as part of shutdown before disconnect returns. Hence there is no need to check the disconnected flag, and we can put devices in disabled states also on driver unbind. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: cypress_m8: remove bogus disconnect test from closeJohan Hovold1-7/+0
Remove disconnected test from close which did not protect any device IO at all. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: cp210x: always disable uart on closeJohan Hovold1-5/+1
Always try to disable the uart on close. Since the switch to tty ports, close will be called as part of shutdown before disconnect returns. Hence there is no need to check the disconnected flag, and we can put devices in disabled states also on driver unbind. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: serial: remove unused MSR-wait queueJohan Hovold1-2/+0
Remove the port MSR-wait queue now that all drivers have been migrated to the tty-port queue. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ti_usb_3410_5052: switch to generic TIOCMIWAIT implementationJohan Hovold1-26/+3
Switch to the generic TIOCMIWAIT implementation which does not suffer from the races involved when using the deprecated sleep_on functions. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ti_usb_3410_5052: switch to generic get_icount implementationJohan Hovold1-37/+7
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ssu100: switch to generic TIOCMIWAIT implementationJohan Hovold1-48/+2
Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ssu100: switch to generic get_icount implementationJohan Hovold1-40/+15
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: add proper modem-status supportJohan Hovold1-17/+10
Fetch modem status on carrier_raised and tiocmget. This driver appeared to support modem-status but only read the modem status registers once at open and then used that cached value for all further enquires. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: reimplement device type detectionJohan Hovold1-49/+21
Reimplement device type detection using the device id table and quirks. Device type was used to detect one device type which did not support to control functions. Add quirks to the device table and store them in the private port data at probe instead. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: clean up modem status retrievalJohan Hovold1-11/+7
Clean up modem status retrieval. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: pass usb-serial port to control functionsJohan Hovold1-26/+28
Pass usb-serial port to the control functions for uart status and work mode. Use port device for debugging and use dev_err to report errors. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: clean up codeJohan Hovold1-35/+37
Clean up this driver somewhat. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: remove broken uart-error handlingJohan Hovold1-52/+0
Remove broken uart-error handling. This driver appears to implement uart-error handling but does not receive status interrupts or status information with bulk in transfers. Instead status was retrieved at open and used to flag only the first bulk in transfer. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: spcp8x5: remove broken TIOCMIWAIT supportJohan Hovold1-68/+0
Remove broken TIOCMIWAIT support. This drivers appears to implement TIOCMIWAIT but has no means of receiving modem-status interrupts. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: quatech2: switch to generic TIOCMIWAIT implementationJohan Hovold1-48/+2
Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: quatech2: switch to generic get_icount implementationJohan Hovold1-39/+12
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: pl2303: fix TIOCMIWAIT and disconnectJohan Hovold1-3/+3
Use tty-port modem-status-change wait queue on which processes are woken up at hangup and disconnect. Currently a process waiting on modem-status changes will not be woken on device disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: pl2303: add custom tiocmiwait operationJohan Hovold1-5/+3
Break out TIOCMIWAIT handling from custom ioctl operation and use tiocmiwait operation field instead. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: oti6858: fix TIOCMIWAIT and disconnectJohan Hovold1-2/+2
Use tty-port modem-status-change wait queue on which processes are woken up at hangup and disconnect. Currently a process waiting on modem-status changes will not be woken on device disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: oti6858: replace custom ioctl operation with tiocmiwaitJohan Hovold1-22/+4
Replace custom ioctl operation with tiocmiwait. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mos7840: switch to generic TIOCMIWAIT implementationJohan Hovold1-46/+2
Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mos7840: switch to generic get_icount implementationJohan Hovold1-47/+9
Switch to the generic get_icount implementation. Note that the interrupt counters will no longer be reset at open which is in accordance with which how the other drivers work. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mos7840: remove smp barriers from icount handlingJohan Hovold1-29/+19
Remove SMP memory barriers from icount handling and rely on the barriers implied by wait_event, sleep and locks, while using the port lock to guarantee atomicity. This is a step in moving over to the generic icount implementations. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mos7720: remove broken get_icount and TIOCMIWAITJohan Hovold1-55/+0
Remove broken get_icount and TIOCMIWAIT support. The driver has an icount structure but it is never been updated which makes get_icount rather pointless and causes TIOCMIWAIT to always return -EIO. Note that the TIOCMIWAIT implementation has always been broken and would not work even if icount support was added as it does not wait for the modem status to change (does not use a work queue at all). Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mct_u232: switch to generic TIOCMIWAIT implementationJohan Hovold1-56/+2
Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: mct_u232: switch to generic get_icount implementationJohan Hovold1-36/+4
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: iuu_phoenix: remove unused MSR-wait queueJohan Hovold1-2/+0
Remove unused, private modem-status wait queue from driver. If TIOCMIWAIT is ever implemented it must not rely on a private wait queue which may have been released when woken up. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: io_ti: switch to generic TIOCMIWAIT implementationJohan Hovold1-30/+4
Switch to the generic TIOCMIWAIT implementation which does not suffer from the races involved when using the deprecated sleep_on functions. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: io_ti: switch to generic get_icount implementationJohan Hovold1-32/+8
Switch to the generic get_icount implementation. Note that the interrupt counters will no longer be reset at open which is in accordance with which how the other drivers work. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: io_edgeport: switch to generic TIOCMIWAIT implementationJohan Hovold2-34/+5
Switch to the generic TIOCMIWAIT implementation. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: io_edgeport: switch to generic get_icount implementationJohan Hovold2-42/+11
Switch to the generic get_icount implementation. Note that the interrupt counters will no longer be reset at open which is in accordance with which how the other drivers work. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: f81232: fix TIOCMIWAIT and disconnectJohan Hovold1-2/+2
Use tty-port modem-status-change wait queue on which processes are woken up at hangup and disconnect. Currently a process waiting on modem-status changes will not be woken on device disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: f81232: add custom tiocmiwait operationJohan Hovold1-6/+3
Break out TIOCMIWAIT handling from custom ioctl operation and use tiocmiwait operation field instead. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: digi_acceleport: remove unused MSR-wait queueJohan Hovold1-3/+0
Remove unused, private modem-status wait queue from driver. If TIOCMIWAIT is ever implemented it must not rely on a private wait queue which may have been released when woken up. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: cypress_m8: fix TIOCMIWAIT and disconnectJohan Hovold1-2/+2
Use tty-port modem-status-change wait queue on which processes are woken up at hangup and disconnect. Currently a process waiting on modem-status changes will not be woken on device disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: cypress_m8: replace custom ioctl operation with tiocmiwaitJohan Hovold1-49/+36
Replace custom ioctl operation with tiocmiwait. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ch341: fix TIOCMIWAIT and disconnectJohan Hovold1-3/+2
Use tty-port modem-status-change wait queue on which processes are woken up at hangup and disconnect. Currently a process waiting on modem-status changes will not be woken on device disconnect as wake up was only done in dtr_rts which isn't guaranteed to be called (e.g. if HUPCL is not set). Also remove the redundant wake-up call from dtr_rts. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ch341: replace custom ioctl operation with tiocmiwaitJohan Hovold1-22/+3
Replace custom ioctl operation with tiocmiwait. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ark3116: switch to generic TIOCMIWAIT implementationJohan Hovold1-28/+2
Switch to the generic TIOCMIWAIT implementation which does not suffer from the races involved when using the deprecated sleep_on functions. This also fixes the issue with processes waiting for modem-status-changes not being woken up at disconnect. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ark3116: switch to generic get_icount implementationJohan Hovold1-40/+18
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ftdi_sio: switch to generic get_icount implementationJohan Hovold1-23/+1
Switch to the generic get_icount implementation. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ftdi_sio: switch to generic TIOCMIWAIT implementationJohan Hovold1-34/+2
Switch to the generic TIOCMIWAIT implementation which does not suffer from the races involved when using the deprecated sleep_on functions. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: ftdi_sio: use port icountJohan Hovold1-17/+14
Use the port-data icount for interrupt counters. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: serial: add generic get_icount implementationJohan Hovold2-0/+29
Add generic get_icount implementation that subdrivers relying on the port interrupt counters can use. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: serial: wake up MSR-wait queue on disconnectJohan Hovold1-0/+1
Make sure processes waiting for modem-status changes are woken up at disconnect. This is needed for custom subdriver TIOCMIWAIT-implementations which do not yet handle hangup. Even though processes on the tty-port wait queue are woken up at hangup the wake-up call in usb-serial disconnect is still needed if a woken-up process may go back to sleep (e.g. due to an incomplete TIOCMIWAIT-implementation). If a disconnect occurs after a hangup, any process waiting for changes will not be woken up a second time by the tty-layer as the port will then have been disassociated from the tty. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-03-25USB: serial: add generic TIOCMIWAIT implementationJohan Hovold2-0/+63
Add generic TIOCMIWAIT implementation which correctly handles hangup, USB-device disconnect, does not rely on the deprecated sleep_on functions and hence does not suffer from the races currently affecting several usb-serial drivers. This makes it much easier to add TIOCMIWAIT support to subdrivers as the tricky details related to hangup and disconnect (e.g. atomicity, that the private port data may have been freed when woken up, and waking up processes at disconnect) have been handled once and for all. To add support to a subdriver, simply set the tiocmiwait-port-operation field, update the port icount fields and wake up any process sleeping on the tty-port modem-status-change wait queue on changes. Note that the tty-port initialised flag can be used to detect disconnected as the port will be hung up as part of disconnect (and cannot be reactivated due to the disconnected flag). However, as the tty-port implementation currently wakes up processes before calling port shutdown, the tty-hupping flag must also be checked to detect hangup for now. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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