linux-stable.git/drivers/usb/serial/generic.c, branch v3.12

USB: serial: remove hupping check from tiocmiwait

2013-07-23T23:21:50+00:00

Since commit 31ca020b ("TTY: wake up processes last at hangup") there no
longer any need to check the hupping flag in the generic tiocmiwait
implementation, so remove it.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: add generic wait_until_sent implementation

2013-05-17T00:32:21+00:00

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 
Signed-off-by: Greg Kroah-Hartman

USB: serial: update copyright information

2013-03-25T20:54:32+00:00

Update copyright information.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: add generic get_icount implementation

2013-03-25T20:50:51+00:00

Add generic get_icount implementation that subdrivers relying on the
port interrupt counters can use.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: add generic TIOCMIWAIT implementation

2013-03-25T20:50:51+00:00

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 
Signed-off-by: Greg Kroah-Hartman

USB: serial: remove generic release callback

2013-03-25T20:48:26+00:00

Remove empty generic release implementation and make the release
callback non-mandatory (like attach, probe and disconnect).

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: remove generic disconnect callback

2013-03-25T20:48:26+00:00

Remove the now empty generic disconnect callback and make the disconnect
callback non-mandatory.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: fix generic disconnect implementation

2013-03-25T20:48:26+00:00

There is no need for the generic disconnect callback to stop the read
and write urbs a second time as this has already been taken care of by
close (which is called from hangup as part of disconnect).

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: remove bogus disconnect test in cleanup

2013-03-25T20:44:18+00:00

Remove bogus (and unnecessary) test for serial->dev being NULL in
cleanup.

The device is never cleared, and cleanup is never called after a
completed disconnect anyway.

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

USB: serial: remove port number from generic-driver debug

2013-03-25T20:42:13+00:00

Remove redundant port number from debug output (already printed as part
of device name).

Signed-off-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman