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iio: buffer: document that buffer callback must be context safe

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Document that the callback registered with iio_channel_get_all_cb()
must be safe to call from any context since it is called from by
iio_push_to_buffer() which can be called in any context.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
David Lechner 2025-09-16 16:02:57 -05:00 committed by Jonathan Cameron
parent 748ed9fc85
commit 592ae0ccec
2 changed files with 3 additions and 1 deletions
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1
drivers/iio/buffer/industrialio-buffer-cb.c
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@ -13,6 +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;

3
include/linux/iio/consumer.h
View File

@ -131,7 +131,8 @@ struct iio_cb_buffer;
/**
* iio_channel_get_all_cb() - register callback for triggered capture
* @dev: Pointer to client device.
* @cb: Callback function.
* @cb: Callback function. Must be safe to call from any context
* (e.g. must not sleep).
* @private: Private data passed to callback.
*
* NB right now we have no ability to mux data from multiple devices.