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soundwire: bus: handle -ENODATA errors in clock stop/start sequences
[ Upstream commit b50bb8b ] If a device lost sync and can no longer ACK a command, it may not be able to enter a lower-power state but it will still be able to resync when the clock restarts. In those cases, we want to continue with the clock stop sequence. This patch modifies the behavior during clock stop sequences to only log errors unrelated to -ENODATA/Command_Ignored. The flow is also modified so that loops continue to prepare/deprepare other devices even when one seems to have lost sync. When resuming the clocks, all issues are logged with a dev_warn(), previously only some of them were checked. This is the only part that now differs between the clock stop entry and clock stop exit sequences: while we don't want to stop the suspend flow, we do want information on potential issues while resuming, as they may have ripple effects. For consistency the log messages are also modified to be unique and self-explanatory. Errors in sdw_slave_clk_stop_callback() were removed, they are now handled in the caller. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20210511030048.25622-4-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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