[PATCH 10/10] iio: adis: Drop non Managed device functions

Jonathan Cameron Jonathan.Cameron at Huawei.com
Tue Sep 15 10:26:41 UTC 2020


On Tue, 15 Sep 2020 10:20:20 +0000
"Sa, Nuno" <Nuno.Sa at analog.com> wrote:

> > -----Original Message-----
> > From: Jonathan Cameron <Jonathan.Cameron at Huawei.com>
> > Sent: Tuesday, September 15, 2020 12:10 PM
> > To: Sa, Nuno <Nuno.Sa at analog.com>
> > Cc: linux-iio at vger.kernel.org; devel at driverdev.osuosl.org; Lars-Peter
> > Clausen <lars at metafoo.de>; Hennerich, Michael
> > <Michael.Hennerich at analog.com>; Jonathan Cameron <jic23 at kernel.org>;
> > Hartmut Knaack <knaack.h at gmx.de>; Peter Meerwald-Stadler
> > <pmeerw at pmeerw.net>; Bogdan, Dragos <Dragos.Bogdan at analog.com>;
> > Greg Kroah-Hartman <gregkh at linuxfoundation.org>; Ardelean, Alexandru
> > <alexandru.Ardelean at analog.com>
> > Subject: Re: [PATCH 10/10] iio: adis: Drop non Managed device functions
> > 
> > [External]
> > 
> > On Tue, 15 Sep 2020 11:33:45 +0200
> > Nuno Sá <nuno.sa at analog.com> wrote:
> >   
> > > Drop `adis_setup_buffer_and_trigger()`. All users were updated to use
> > > the devm version of this function. This avoids having almost the same
> > > code repeated.
> > >
> > > Signed-off-by: Nuno Sá <nuno.sa at analog.com>  
> > 
> > Good to see this cleanup, as long as we tidy up the few issues in the
> > earlier patches.
> > 
> > Note I think I only commented on first instance of each thing to fix.
> > Please carry them through all the patches.
> > 
> > Thanks,
> > 
> > Jonathan  
> 
> So, I did thought about further cleaning the probe functions in order to get
> rid of the remove function but it felt like a different series to me. Anyways, since
> it's fine with you to include those changes here I will send a v2.

Understood.  Could have been separate, but it feels like trying to use devm
throughout is a good enough theme per patch to combine them.  This is particularly
true as you'd need to do 3 series if you wanted to separate this out without the
ordering issues.

1) Devm stuff before this particular function in probe.
2) This series
3) Devm stuff after the particular function in probe.

Definitely easier to do in one go and still easily reviewed individual patches!

Jonathan

> 
> - Nuno Sá
>  
> > > ---
> > >  drivers/iio/imu/adis_buffer.c  | 64 +++-------------------------------
> > >  drivers/iio/imu/adis_trigger.c | 60 -------------------------------
> > >  include/linux/iio/imu/adis.h   | 27 --------------
> > >  3 files changed, 4 insertions(+), 147 deletions(-)
> > >
> > > diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c
> > > index 5b4225ee09b9..df6144285470 100644
> > > --- a/drivers/iio/imu/adis_buffer.c
> > > +++ b/drivers/iio/imu/adis_buffer.c
> > > @@ -169,48 +169,6 @@ static void adis_buffer_cleanup(void *arg)
> > >  	kfree(adis->xfer);
> > >  }
> > >
> > > -/**
> > > - * adis_setup_buffer_and_trigger() - Sets up buffer and trigger for the  
> > adis device  
> > > - * @adis: The adis device.
> > > - * @indio_dev: The IIO device.
> > > - * @trigger_handler: Optional trigger handler, may be NULL.
> > > - *
> > > - * Returns 0 on success, a negative error code otherwise.
> > > - *
> > > - * This function sets up the buffer and trigger for a adis devices.  If
> > > - * 'trigger_handler' is NULL the default trigger handler will be used. The
> > > - * default trigger handler will simply read the registers assigned to the
> > > - * currently active channels.
> > > - *
> > > - * adis_cleanup_buffer_and_trigger() should be called to free the  
> > resources  
> > > - * allocated by this function.
> > > - */
> > > -int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev  
> > *indio_dev,  
> > > -	irqreturn_t (*trigger_handler)(int, void *))
> > > -{
> > > -	int ret;
> > > -
> > > -	if (!trigger_handler)
> > > -		trigger_handler = adis_trigger_handler;
> > > -
> > > -	ret = iio_triggered_buffer_setup(indio_dev,  
> > &iio_pollfunc_store_time,  
> > > -		trigger_handler, NULL);
> > > -	if (ret)
> > > -		return ret;
> > > -
> > > -	if (adis->spi->irq) {
> > > -		ret = adis_probe_trigger(adis, indio_dev);
> > > -		if (ret)
> > > -			goto error_buffer_cleanup;
> > > -	}
> > > -	return 0;
> > > -
> > > -error_buffer_cleanup:
> > > -	iio_triggered_buffer_cleanup(indio_dev);
> > > -	return ret;
> > > -}
> > > -EXPORT_SYMBOL_GPL(adis_setup_buffer_and_trigger);
> > > -
> > >  /**
> > >   * devm_adis_setup_buffer_and_trigger() - Sets up buffer and trigger for
> > >   *					  the managed adis device
> > > @@ -220,7 +178,10 @@  
> > EXPORT_SYMBOL_GPL(adis_setup_buffer_and_trigger);  
> > >   *
> > >   * Returns 0 on success, a negative error code otherwise.
> > >   *
> > > - * This function perfoms exactly the same as  
> > adis_setup_buffer_and_trigger()  
> > > + * This function sets up the buffer and trigger for a adis devices.  If
> > > + * 'trigger_handler' is NULL the default trigger handler will be used. The
> > > + * default trigger handler will simply read the registers assigned to the
> > > + * currently active channels.
> > >   */
> > >  int
> > >  devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev  
> > *indio_dev,  
> > > @@ -248,20 +209,3 @@ devm_adis_setup_buffer_and_trigger(struct adis  
> > *adis, struct iio_dev *indio_dev,  
> > >  }
> > >  EXPORT_SYMBOL_GPL(devm_adis_setup_buffer_and_trigger);
> > >
> > > -/**
> > > - * adis_cleanup_buffer_and_trigger() - Free buffer and trigger resources
> > > - * @adis: The adis device.
> > > - * @indio_dev: The IIO device.
> > > - *
> > > - * Frees resources allocated by adis_setup_buffer_and_trigger()
> > > - */
> > > -void adis_cleanup_buffer_and_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev)
> > > -{
> > > -	if (adis->spi->irq)
> > > -		adis_remove_trigger(adis);
> > > -	kfree(adis->buffer);
> > > -	kfree(adis->xfer);
> > > -	iio_triggered_buffer_cleanup(indio_dev);
> > > -}
> > > -EXPORT_SYMBOL_GPL(adis_cleanup_buffer_and_trigger);
> > > diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
> > > index 8afe71947c00..64e0ba51cb18 100644
> > > --- a/drivers/iio/imu/adis_trigger.c
> > > +++ b/drivers/iio/imu/adis_trigger.c
> > > @@ -55,53 +55,6 @@ static int adis_validate_irq_flag(struct adis *adis)
> > >
> > >  	return 0;
> > >  }
> > > -/**
> > > - * adis_probe_trigger() - Sets up trigger for a adis device
> > > - * @adis: The adis device
> > > - * @indio_dev: The IIO device
> > > - *
> > > - * Returns 0 on success or a negative error code
> > > - *
> > > - * adis_remove_trigger() should be used to free the trigger.
> > > - */
> > > -int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
> > > -{
> > > -	int ret;
> > > -
> > > -	adis->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
> > > -					indio_dev->id);
> > > -	if (adis->trig == NULL)
> > > -		return -ENOMEM;
> > > -
> > > -	adis_trigger_setup(adis);
> > > -
> > > -	ret = adis_validate_irq_flag(adis);
> > > -	if (ret)
> > > -		return ret;
> > > -
> > > -	ret = request_irq(adis->spi->irq,
> > > -			  &iio_trigger_generic_data_rdy_poll,
> > > -			  adis->irq_flag,
> > > -			  indio_dev->name,
> > > -			  adis->trig);
> > > -	if (ret)
> > > -		goto error_free_trig;
> > > -
> > > -	ret = iio_trigger_register(adis->trig);
> > > -
> > > -	indio_dev->trig = iio_trigger_get(adis->trig);
> > > -	if (ret)
> > > -		goto error_free_irq;
> > > -
> > > -	return 0;
> > > -
> > > -error_free_irq:
> > > -	free_irq(adis->spi->irq, adis->trig);
> > > -error_free_trig:
> > > -	iio_trigger_free(adis->trig);
> > > -	return ret;
> > > -}
> > > -EXPORT_SYMBOL_GPL(adis_probe_trigger);
> > >
> > >  /**
> > >   * devm_adis_probe_trigger() - Sets up trigger for a managed adis device
> > > @@ -137,16 +90,3 @@ int devm_adis_probe_trigger(struct adis *adis,  
> > struct iio_dev *indio_dev)  
> > >  }
> > >  EXPORT_SYMBOL_GPL(devm_adis_probe_trigger);
> > >
> > > -/**
> > > - * adis_remove_trigger() - Remove trigger for a adis devices
> > > - * @adis: The adis device
> > > - *
> > > - * Removes the trigger previously registered with adis_probe_trigger().
> > > - */
> > > -void adis_remove_trigger(struct adis *adis)
> > > -{
> > > -	iio_trigger_unregister(adis->trig);
> > > -	free_irq(adis->spi->irq, adis->trig);
> > > -	iio_trigger_free(adis->trig);
> > > -}
> > > -EXPORT_SYMBOL_GPL(adis_remove_trigger);
> > > diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
> > > index 2df67448f0d1..01ba691da2f3 100644
> > > --- a/include/linux/iio/imu/adis.h
> > > +++ b/include/linux/iio/imu/adis.h
> > > @@ -517,14 +517,8 @@ struct adis_burst {
> > >  int
> > >  devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev  
> > *indio_dev,  
> > >  				   irq_handler_t trigger_handler);
> > > -int adis_setup_buffer_and_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void  
> > *));  
> > > -void adis_cleanup_buffer_and_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev);
> > >
> > >  int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
> > > -int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
> > > -void adis_remove_trigger(struct adis *adis);
> > >
> > >  int adis_update_scan_mode(struct iio_dev *indio_dev,
> > >  	const unsigned long *scan_mask);
> > > @@ -538,33 +532,12 @@ devm_adis_setup_buffer_and_trigger(struct adis  
> > *adis, struct iio_dev *indio_dev,  
> > >  	return 0;
> > >  }
> > >
> > > -static inline int adis_setup_buffer_and_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *))
> > > -{
> > > -	return 0;
> > > -}
> > > -
> > > -static inline void adis_cleanup_buffer_and_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev)
> > > -{
> > > -}
> > > -
> > >  static inline int devm_adis_probe_trigger(struct adis *adis,
> > >  					  struct iio_dev *indio_dev)
> > >  {
> > >  	return 0;
> > >  }
> > >
> > > -static inline int adis_probe_trigger(struct adis *adis,
> > > -	struct iio_dev *indio_dev)
> > > -{
> > > -	return 0;
> > > -}
> > > -
> > > -static inline void adis_remove_trigger(struct adis *adis)
> > > -{
> > > -}
> > > -
> > >  #define adis_update_scan_mode NULL
> > >
> > >  #endif /* CONFIG_IIO_BUFFER */  
> >   
> 




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