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3e0ca3c38d
We need to ensure DMA engine could be stopped in order for kexec to start the next kernel. So add the shutdown operation support. Signed-off-by: Peng Ma <peng.ma@nxp.com> Link: https://lore.kernel.org/r/20200227042841.18358-1-peng.ma@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>