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| author |   Ian Abbott <abbotti@mev.co.uk> | 2013-11-08 15:03:28 +0000 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-11 16:16:44 -0800 |
| commit | d19db51a0eeb659cd924a9d08b20a2ed4ee46b15 (patch) | |
| tree | bed15b7a8d0dd01f0d5dfbffced7e0282c5ae65a /drivers/staging/comedi/drivers.c | |
| parent | staging: comedi: wake up async waiters when become non-busy (diff) | |
| download | linux-dev-d19db51a0eeb659cd924a9d08b20a2ed4ee46b15.tar.xz linux-dev-d19db51a0eeb659cd924a9d08b20a2ed4ee46b15.zip | |
staging: comedi: cancel commands before detaching device
The comedi core module's handling of the `COMEDI_DEVCONFIG` ioctl will
not allow a device to be detached if it is busy. However, comedi
devices can also be auto-detached due to a removal of a hardware device.
One of the things we should do in that case is cancel any asynchronous
commands that are running. Add a new function
`comedi_device_cancel_all()` to do that and call it from
`comedi_device_detach()`.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/drivers.c')
| -rw-r--r-- | drivers/staging/comedi/drivers.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c index 1f44f2939f6a..4f727731a72d 100644 --- a/drivers/staging/comedi/drivers.c +++ b/drivers/staging/comedi/drivers.c @@ -133,6 +133,7 @@ static void comedi_device_detach_cleanup(struct comedi_device *dev) void comedi_device_detach(struct comedi_device *dev) { + comedi_device_cancel_all(dev); down_write(&dev->attach_lock); dev->attached = false; if (dev->driver) |