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Commit beb80600 authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

staging:iio:buffer add a cache of the timestamp scan index. 



Basically avoids looking it up lots of times.

Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5fb21c82

drivers/staging/iio/buffer.h

+1 −0
Original line number Diff line number Diff line
@@ -106,6 +106,7 @@ struct iio_buffer { 
	int					scan_count;

	long					*scan_mask;

	bool					scan_timestamp;

	unsigned				scan_index_timestamp;

	const struct iio_buffer_access_funcs	*access;

	const struct iio_buffer_setup_ops		*setup_ops;

	struct list_head			scan_el_dev_attr_list;

drivers/staging/iio/industrialio-buffer.c

+3 −0
Original line number Diff line number Diff line
@@ -313,6 +313,9 @@ int iio_buffer_register(struct iio_dev *indio_dev, 
			if (ret < 0)

				goto error_cleanup_dynamic;

			attrcount += ret;

			if (channels[i].type == IIO_TIMESTAMP)

				buffer->scan_index_timestamp =

					channels[i].scan_index;

		}

		if (indio_dev->masklength && buffer->scan_mask == NULL) {

			buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),