Re: [PATCH 1/3] iio: drop timestamp parameter in push_to_buffer() and store_to()

[Peter Meerwald <pmeerw@xxxxxxxxxx>]

Hello,

> This commit message needs a explanation why they should be dropped.

thanks for looking at this!

the patch is moreless a reminder:
http://www.spinics.net/lists/linux-iio/msg06102.html

the timestamp parameter should be dropped because it is not used; there 
can be a timestamp channel and providing an additional timestamp when 
pushing the buffer is confusing

> Also the drivers affected by this change should be updated by the patch itself,
> not by follow-up patches. It is not good style to knowingly break drivers,
> since it will break proper bisectabillity of the drivers.

I know; I split it up to clearly show what the fundamental change is, and 
how it affects drivers -- for submission it should be one patch

regards, p.


> > Signed-off-by: Peter Meerwald <pmeerw@xxxxxxxxxx>
> > ---
> >  drivers/iio/industrialio-buffer.c |    5 ++---
> >  include/linux/iio/buffer.h        |    6 ++----
> >  2 files changed, 4 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
> > index 4add9bb..243810a 100644
> > --- a/drivers/iio/industrialio-buffer.c
> > +++ b/drivers/iio/industrialio-buffer.c
> > @@ -682,12 +682,11 @@ static unsigned char *iio_demux(struct iio_buffer *buffer,
> >  	return buffer->demux_bounce;
> >  }
> >  
> > -int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
> > -		       s64 timestamp)
> > +int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data)
> >  {
> >  	unsigned char *dataout = iio_demux(buffer, data);
> >  
> > -	return buffer->access->store_to(buffer, dataout, timestamp);
> > +	return buffer->access->store_to(buffer, dataout);
> >  }
> >  EXPORT_SYMBOL_GPL(iio_push_to_buffer);
> >  
> > diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h
> > index 8ba516f..c629b3a 100644
> > --- a/include/linux/iio/buffer.h
> > +++ b/include/linux/iio/buffer.h
> > @@ -36,7 +36,7 @@ struct iio_buffer;
> >   * any of them not existing.
> >   **/
> >  struct iio_buffer_access_funcs {
> > -	int (*store_to)(struct iio_buffer *buffer, u8 *data, s64 timestamp);
> > +	int (*store_to)(struct iio_buffer *buffer, u8 *data);
> >  	int (*read_first_n)(struct iio_buffer *buffer,
> >  			    size_t n,
> >  			    char __user *buf);
> > @@ -118,10 +118,8 @@ int iio_scan_mask_set(struct iio_dev *indio_dev,
> >   * iio_push_to_buffer() - push to a registered buffer.
> >   * @buffer:		IIO buffer structure for device
> >   * @data:		the data to push to the buffer
> > - * @timestamp:		timestamp to associate with the data
> >   */
> > -int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
> > -		       s64 timestamp);
> > +int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data);
> >  
> >  int iio_update_demux(struct iio_dev *indio_dev);

-- 

Peter Meerwald
+43-664-2444418 (mobile)
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