staging: comedi: adjust module count on device cleanup
authorIan Abbott <abbotti@mev.co.uk>
Thu, 4 Apr 2013 13:58:45 +0000 (14:58 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 5 Apr 2013 21:33:16 +0000 (14:33 -0700)
commita649a6754d246d5b5447f74b86ed4b947e5f5446
tree97ebe4002b891f9aaf1c6535f6153f7b0f644aa9
parent4ca7da6e8234c864c8694237c26e4d574b9fd00a
staging: comedi: adjust module count on device cleanup

`comedi_device_cleanup()` is called just before freeing a comedi device.
It is possible for the device to still be open in which case the module
reference counts for the core comedi module and possibly the low-level
driver module will remain out of whack because `comedi_close()` will not
find the comedi device and so will not decrement the module counts.

This really needs to be handled better, but for now decrement the module
counts in `comedi_device_cleanup()` according to the number of
outstanding opens.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/comedi_fops.c