Commit 5d65d920 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Jonathan Cameron
Browse files

iio: iio_push_to_buffers(): Change type of 'data' to const void * 



Change the type of the 'data' parameter for iio_push_to_buffers() from 'u8 *' to
'const void *'. Drivers typically use the correct type (e.g. __be16 *) for their
data buffer. When passing the buffer to iio_push_to_buffers() it needs to be
cast to 'u8 *' for the compiler to not complain (and also having to add __force
if we want to keep sparse happy as well). Since the buffer implementation should
not care about the data layout (except the size of one sample) using a void
pointer is the correct thing to do. Also make it const as the buffer
implementations are not supposed to modify it.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent c7a22c36

drivers/iio/buffer_cb.c

+3 −3
Original line number Diff line number Diff line
@@ -7,12 +7,12 @@ 


struct iio_cb_buffer {

	struct iio_buffer buffer;

	int (*cb)(u8 *data, void *private);

	int (*cb)(const void *data, void *private);

	void *private;

	struct iio_channel *channels;

};



static int iio_buffer_cb_store_to(struct iio_buffer *buffer, u8 *data)

static int iio_buffer_cb_store_to(struct iio_buffer *buffer, const void *data)

{

	struct iio_cb_buffer *cb_buff = container_of(buffer,

						     struct iio_cb_buffer,
@@ -26,7 +26,7 @@ static const struct iio_buffer_access_funcs iio_cb_access = { 
};



struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,

					     int (*cb)(u8 *data,

					     int (*cb)(const void *data,

						       void *private),

					     void *private)

{

drivers/iio/industrialio-buffer.c

+5 −5
Original line number Diff line number Diff line
@@ -769,8 +769,8 @@ struct iio_demux_table { 
	struct list_head l;

};



static unsigned char *iio_demux(struct iio_buffer *buffer,

				 unsigned char *datain)

static const void *iio_demux(struct iio_buffer *buffer,

				 const void *datain)

{

	struct iio_demux_table *t;
@@ -783,9 +783,9 @@ static unsigned char *iio_demux(struct iio_buffer *buffer, 
	return buffer->demux_bounce;

}



static int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data)

static int iio_push_to_buffer(struct iio_buffer *buffer, const void *data)

{

	unsigned char *dataout = iio_demux(buffer, data);

	const void *dataout = iio_demux(buffer, data);



	return buffer->access->store_to(buffer, dataout);

}
@@ -800,7 +800,7 @@ static void iio_buffer_demux_free(struct iio_buffer *buffer) 
}





int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data)

int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data)

{

	int ret;

	struct iio_buffer *buf;

drivers/iio/kfifo_buf.c

+1 −1
Original line number Diff line number Diff line
@@ -95,7 +95,7 @@ static int iio_set_length_kfifo(struct iio_buffer *r, int length) 
}



static int iio_store_to_kfifo(struct iio_buffer *r,

			      u8 *data)

			      const void *data)

{

	int ret;

	struct iio_kfifo *kf = iio_to_kfifo(r);

include/linux/iio/buffer.h

+3 −3
Original line number Diff line number Diff line
@@ -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);

	int (*store_to)(struct iio_buffer *buffer, const void *data);

	int (*read_first_n)(struct iio_buffer *buffer,

			    size_t n,

			    char __user *buf);
@@ -81,7 +81,7 @@ struct iio_buffer { 
	bool					stufftoread;

	const struct attribute_group *attrs;

	struct list_head			demux_list;

	unsigned char				*demux_bounce;

	void					*demux_bounce;

	struct list_head			buffer_list;

};
@@ -120,7 +120,7 @@ int iio_scan_mask_set(struct iio_dev *indio_dev, 
 * @indio_dev:		iio_dev structure for device.

 * @data:		Full scan.

 */

int iio_push_to_buffers(struct iio_dev *indio_dev, unsigned char *data);

int iio_push_to_buffers(struct iio_dev *indio_dev, const void *data);



int iio_update_demux(struct iio_dev *indio_dev);

include/linux/iio/consumer.h

+1 −1
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ struct iio_cb_buffer; 
 * fail.

 */

struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,

					     int (*cb)(u8 *data,

					     int (*cb)(const void *data,

						       void *private),

					     void *private);

/**

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