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The rx_data pointer can be used by IPC implementations to pass the received message (or part of the message, like the header) from platform code to generic, high level IPC code. IPC4 is going to be the first user of this as its implementation on Intel platforms detaches the header and payload and the rx cannot be handled in a similar way as it is implemented for ipc3. If the rx_data is dynamically allocated, it is up to the platform code to free it up. After the message reception handling (rx_msg ops) returned, the pointer via the msg->rx_data should be considered as invalid. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Link: https://lore.kernel.org/r/20220505094818.10346-2-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| sound_core.c | ||