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We need to ensure that all DMAs and interrupts are cleared during shutdown operation in order for kexec to start the next kernel clearly. Otherwise, HW could be performing a DMA into random addresses in the middle of second kernel start. Signed-off-by: Sinan Kaya <okaya@codeaurora.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>