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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index e18a58068bca..1d2be18fec15 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -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 */