From: Vignesh R <vigneshr@ti.com>
Date: Wed, 23 Nov 2016 09:27:55 +0000 (+0530)
Subject: dmaengine: edma: re-initialize dummy slot during system resume
X-Git-Tag: v4.10-rc1~108^2~4^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08c824e87ea05f989a9768a365f0fc70bcd25298;p=platform%2Fkernel%2Flinux-exynos.git

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>
---

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index e18a580..1d2be18 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 */