From 5d65d92045cb7d3b2c45020c0e62d6d1c1d34f37 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Sun, 15 Sep 2013 17:50:00 +0100 Subject: [PATCH] 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: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- drivers/iio/buffer_cb.c | 6 +++--- drivers/iio/industrialio-buffer.c | 10 +++++----- drivers/iio/kfifo_buf.c | 2 +- include/linux/iio/buffer.h | 6 +++--- include/linux/iio/consumer.h | 2 +- 5 files changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/iio/buffer_cb.c b/drivers/iio/buffer_cb.c index f406889248c8..578f7199ed51 100644 --- a/drivers/iio/buffer_cb.c +++ b/drivers/iio/buffer_cb.c @@ -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) { diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 7ea2edbf7614..a7ac4b5af03e 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -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; diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 1bea41bcbdc6..538d4616e48f 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -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); diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index 2bac0eb8948d..e5507e999ed1 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); + 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); diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 833926c91aa8..2752b1fd12be 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -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); /**