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If the DMAs are not being quiesced properly, it may lead to stability issues, so the recommendation is to wait till DMAs are stopped. After setting the stop bit of RIRB/CORB DMA, we should wait for stop bit to be set. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>