staging: comedi: add 'pacer' member to struct comedi_device
Add a new member to the comedi_device struct for a comedi_8254 'pacer'. This provides a convient place to store the data allocated by the comedi_8254 module for boards that use an 8254 device to create the data acquisition pacer clock. Automatically free this pointer in comedi_device_detach_cleanup() so that the drivers don't need to do it when then are detached. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -256,6 +256,7 @@ struct comedi_driver {
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struct comedi_device {
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int use_count;
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struct comedi_driver *driver;
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struct comedi_8254 *pacer;
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void *private;
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struct device *class_dev;
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@ -139,7 +139,9 @@ static void comedi_device_detach_cleanup(struct comedi_device *dev)
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dev->n_subdevices = 0;
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}
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kfree(dev->private);
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kfree(dev->pacer);
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dev->private = NULL;
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dev->pacer = NULL;
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dev->driver = NULL;
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dev->board_name = NULL;
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dev->board_ptr = NULL;
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