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[4.9,085/129] dmaengine: ti: edma: Do not reset reserved paRAM slots

Message ID 20191003154357.581377596@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Oct. 3, 2019, 3:53 p.m. UTC 
From: Peter Ujfalusi <peter.ujfalusi@ti.com>


[ Upstream commit c5dbe60664b3660f5ac5854e21273ea2e7ff698f ]

Skip resetting paRAM slots marked as reserved as they might be used by
other cores.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

Link: https://lore.kernel.org/r/20190823125618.8133-2-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 drivers/dma/edma.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

-- 
2.20.1
diff mbox series

Patch

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 57962bff75324..72f31e837b1d5 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -2268,9 +2268,6 @@  static int edma_probe(struct platform_device *pdev)
 
 	ecc->default_queue = info->default_queue;
 
-	for (i = 0; i < ecc->num_slots; i++)
-		edma_write_slot(ecc, i, &dummy_paramset);
-
 	if (info->rsv) {
 		/* Set the reserved slots in inuse list */
 		rsv_slots = info->rsv->rsv_slots;
@@ -2283,6 +2280,12 @@  static int edma_probe(struct platform_device *pdev)
 		}
 	}
 
+	for (i = 0; i < ecc->num_slots; i++) {
+		/* Reset only unused - not reserved - paRAM slots */
+		if (!test_bit(i, ecc->slot_inuse))
+			edma_write_slot(ecc, i, &dummy_paramset);
+	}
+
 	/* Clear the xbar mapped channels in unused list */
 	xbar_chans = info->xbar_chans;
 	if (xbar_chans) {