Commit 08c824e8 authored Nov 23, 2016 by Vignesh R Committed by Vinod Koul Nov 30, 2016

dmaengine: edma: re-initialize dummy slot during system resume



The last param set in a transfer should always be pointing to dummy
param set in non-cyclic mode. When system wakes from low power state
EDMA PARAM slots may be reset to random values. Hence, re-initialize
dummy slot to dummy param set on system resume.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 201ac486

drivers/dma/edma.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2450,6 +2450,9 @@ static int edma_pm_resume(struct device *dev)
		int i;
		s8 (*queue_priority_mapping)[2];

		/* re initialize dummy slot to dummy param set */
		edma_write_slot(ecc, ecc->dummy_slot, &dummy_paramset);

		queue_priority_mapping = ecc->info->queue_priority_mapping;

		/* Event queue priority mapping */