From patchwork Tue Sep 16 19:45:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 4919631 Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 73C81BEEA5 for ; Tue, 16 Sep 2014 19:46:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A30F3201BB for ; Tue, 16 Sep 2014 19:46:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5C162017D for ; Tue, 16 Sep 2014 19:46:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755390AbaIPTqb (ORCPT ); Tue, 16 Sep 2014 15:46:31 -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 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s8GJk5eV026850; Tue, 16 Sep 2014 14:46:05 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s8GJk51X024887; Tue, 16 Sep 2014 14:46:05 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.174.1; Tue, 16 Sep 2014 14:46:05 -0500 Received: from dlep32.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s8GJjxme021106; Tue, 16 Sep 2014 14:46:03 -0500 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 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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; }