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staging: comedi: remove hardware_device from struct comedi_device_info
The `hardware_device` member of `struct comedi_device_info` is only set to point to a hardware device by the auto-configuration code (specifically `comedi_alloc_board_minor() with a non-NULL `hardware_device` parameter) so that it can be found again by the auto-unconfiguration code (specifically `comedi_release_hardware_device()`). However, as `info->device->hw_dev` (where `info` is a pointer to the `struct comedi_device_info`) is set to the same value as `info->hardware_device` (by calling `comedi_set_hw_dev()` with the same hardware device pointer) we can look for that instead, so there is no need for the `hardware_device` member any more. Get rid of it. 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>
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@ -85,7 +85,6 @@ struct comedi_file_info {
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struct comedi_device *device;
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struct comedi_subdevice *read_subdevice;
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struct comedi_subdevice *write_subdevice;
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struct device *hardware_device;
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};
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static DEFINE_MUTEX(comedi_board_minor_table_lock);
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@ -2368,7 +2367,6 @@ struct comedi_device *comedi_alloc_board_minor(struct device *hardware_device)
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return ERR_PTR(-ENOMEM);
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}
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info->device = dev;
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info->hardware_device = hardware_device;
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comedi_device_init(dev);
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comedi_set_hw_dev(dev, hardware_device);
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mutex_lock(&dev->mutex);
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@ -2415,7 +2413,7 @@ void comedi_release_hardware_device(struct device *hardware_device)
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minor++) {
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mutex_lock(&comedi_board_minor_table_lock);
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info = comedi_board_minor_table[minor];
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if (info && info->hardware_device == hardware_device) {
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if (info && info->device->hw_dev == hardware_device) {
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comedi_board_minor_table[minor] = NULL;
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mutex_unlock(&comedi_board_minor_table_lock);
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comedi_free_board_file_info(info);
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