diff options
Diffstat (limited to 'drivers/iio/buffer/industrialio-buffer-cb.c')
| -rw-r--r-- | drivers/iio/buffer/industrialio-buffer-cb.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c index ea63c838eeae..f4ebff968493 100644 --- a/drivers/iio/buffer/industrialio-buffer-cb.c +++ b/drivers/iio/buffer/industrialio-buffer-cb.c @@ -1,8 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0-only /* The industrial I/O callback buffer - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. */ #include <linux/kernel.h> @@ -16,6 +13,7 @@ struct iio_cb_buffer { struct iio_buffer buffer; + /* Must be safe to call from any context (e.g. must not sleep). */ int (*cb)(const void *data, void *private); void *private; struct iio_channel *channels; @@ -36,7 +34,8 @@ static int iio_buffer_cb_store_to(struct iio_buffer *buffer, const void *data) static void iio_buffer_cb_release(struct iio_buffer *buffer) { struct iio_cb_buffer *cb_buff = buffer_to_cb_buffer(buffer); - kfree(cb_buff->buffer.scan_mask); + + bitmap_free(cb_buff->buffer.scan_mask); kfree(cb_buff); } @@ -56,6 +55,11 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, struct iio_cb_buffer *cb_buff; struct iio_channel *chan; + if (!cb) { + dev_err(dev, "Invalid arguments: A callback must be provided!\n"); + return ERR_PTR(-EINVAL); + } + cb_buff = kzalloc(sizeof(*cb_buff), GFP_KERNEL); if (cb_buff == NULL) return ERR_PTR(-ENOMEM); @@ -65,7 +69,6 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, cb_buff->private = private; cb_buff->cb = cb; cb_buff->buffer.access = &iio_cb_access; - INIT_LIST_HEAD(&cb_buff->buffer.demux_list); cb_buff->channels = iio_channel_get_all(dev); if (IS_ERR(cb_buff->channels)) { @@ -74,9 +77,8 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, } cb_buff->indio_dev = cb_buff->channels[0].indio_dev; - cb_buff->buffer.scan_mask - = kcalloc(BITS_TO_LONGS(cb_buff->indio_dev->masklength), - sizeof(long), GFP_KERNEL); + cb_buff->buffer.scan_mask = bitmap_zalloc(iio_get_masklength(cb_buff->indio_dev), + GFP_KERNEL); if (cb_buff->buffer.scan_mask == NULL) { ret = -ENOMEM; goto error_release_channels; @@ -95,7 +97,7 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, return cb_buff; error_free_scan_mask: - kfree(cb_buff->buffer.scan_mask); + bitmap_free(cb_buff->buffer.scan_mask); error_release_channels: iio_channel_release_all(cb_buff->channels); error_free_cb_buff: |