From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934828AbcKWJ2M (ORCPT ); Wed, 23 Nov 2016 04:28:12 -0500 Received: from fllnx209.ext.ti.com ([198.47.19.16]:24706 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934759AbcKWJ16 (ORCPT ); Wed, 23 Nov 2016 04:27:58 -0500 From: Vignesh R To: Vinod Koul CC: , , Vignesh R , Peter Ujfalusi , , Sekhar Nori Subject: [PATCH] dmaengine: edma: re-initialize dummy slot during system resume Date: Wed, 23 Nov 2016 14:57:55 +0530 Message-ID: <20161123092755.8522-1-vigneshr@ti.com> X-Mailer: git-send-email 2.10.2 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Acked-by: Peter Ujfalusi --- drivers/dma/edma.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 77242b37ef87..3879f80a4815 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -2451,6 +2451,9 @@ 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 */ -- 2.10.2