From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755416AbaIPTqc (ORCPT ); Tue, 16 Sep 2014 15:46:32 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:52435 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755384AbaIPTqa (ORCPT ); Tue, 16 Sep 2014 15:46:30 -0400 From: Peter Ujfalusi To: , , Russell King - ARM Linux CC: , , Subject: [PATCH v3 1/2] dmaengine: omap-dma: Add memory barrier to dma_resume path Date: Tue, 16 Sep 2014 22:45:56 +0300 Message-ID: <1410896757-3848-2-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1410896757-3848-1-git-send-email-peter.ujfalusi@ti.com> References: <1410896757-3848-1-git-send-email-peter.ujfalusi@ti.com> 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 Add mb() call to resume path to ensure the necessary barrier. Resume can happen after waking up from suspend for example. Signed-off-by: Peter Ujfalusi Acked-by: Russell King --- drivers/dma/omap-dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 4cf7d9a950d7..c01ea505ee7c 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -1017,6 +1017,8 @@ static int omap_dma_resume(struct omap_chan *c) return -EINVAL; if (c->paused) { + mb(); + omap_dma_start(c, c->desc); c->paused = false; } -- 2.1.0