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authorTony Lindgren <tony@atomide.com>2021-05-18 10:43:47 +0300
committerVinod Koul <vkoul@kernel.org>2021-05-31 10:01:53 +0530
commit340ad031887b89af4467ee078e22d24aad0d8401 (patch)
treecf4137726b4d2d38ee333156ae346d1a91271447 /usr
parent66fde1794ffd075c1b2026d8956f667704c76920 (diff)
dmaengine: ti: omap-dma: Skip pointless cpu_pm context restore on errors
There's no need to restore DMA context on CPU_CLUSTER_PM_ENTER_FAILED as the DMA context won't be lost on errors. Note that this does not cause invalid context restore as we already check for busy DMA with omap_dma_busy() in CPU_CLUSTER_PM_ENTER, and block any deeper idle states for the SoC by returning NOTIFY_BAD if busy. If other drivers block deeper idle states with cpu_pm, we now just do a pointless restore, but only if dma was not busy on CPU_CLUSTER_PM_ENTER. Let's update the CPU_CLUSTER_PM_ENTER_FAILED handling for correctness, and add a comment. Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Adam Ford <aford173@gmail.com> Cc: Andreas Kemnade <andreas@kemnade.info> Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com> Link: https://lore.kernel.org/r/20210518074347.16908-1-tony@atomide.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
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