From patchwork Wed Aug 28 11:02:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabrizio Castro X-Patchwork-Id: 11118547 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 886EC16B1 for ; Wed, 28 Aug 2019 11:05:53 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 71E02208CB for ; Wed, 28 Aug 2019 11:05:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 71E02208CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bp.renesas.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=cip-dev-bounces@lists.cip-project.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id BC59B2AC8; Wed, 28 Aug 2019 11:04:26 +0000 (UTC) X-Original-To: cip-dev@lists.cip-project.org Delivered-To: cip-dev@mail.linuxfoundation.org Received: from smtp2.linuxfoundation.org (smtp2.linux-foundation.org [172.17.192.36]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 3424A2A9E for ; Wed, 28 Aug 2019 11:04:06 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp2.linuxfoundation.org (Postfix) with ESMTP id A49601DE27 for ; Wed, 28 Aug 2019 11:04:05 +0000 (UTC) X-IronPort-AV: E=Sophos;i="5.64,440,1559487600"; d="scan'208";a="24929566" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 28 Aug 2019 20:04:05 +0900 Received: from fabrizio-dev.ree.adwin.renesas.com (unknown [10.226.36.196]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 6B45D4009677; Wed, 28 Aug 2019 20:04:04 +0900 (JST) From: Fabrizio Castro To: cip-dev@lists.cip-project.org Date: Wed, 28 Aug 2019 12:02:53 +0100 Message-Id: <1566990211-24785-23-git-send-email-fabrizio.castro@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1566990211-24785-1-git-send-email-fabrizio.castro@bp.renesas.com> References: <1566990211-24785-1-git-send-email-fabrizio.castro@bp.renesas.com> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp2.linux-foundation.org Cc: Biju Das Subject: [cip-dev] [PATCH 4.19.y 22/60] serial: sh-sci: Extract sci_dma_rx_chan_invalidate() X-BeenThere: cip-dev@lists.cip-project.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: cip-dev-bounces@lists.cip-project.org Errors-To: cip-dev-bounces@lists.cip-project.org From: Geert Uytterhoeven commit 11b3770d54b28dcd905155a6d4aa551187ff00eb upstream. The cookies and channel pointer for the DMA receive channel are invalidated in two places, and one more is planned. Extract this functionality in a common helper. Signed-off-by: Geert Uytterhoeven Reviewed-by: Simon Horman Signed-off-by: Greg Kroah-Hartman Signed-off-by: Fabrizio Castro --- drivers/tty/serial/sh-sci.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 9e1a6af..2632bb2 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1233,12 +1233,22 @@ static int sci_dma_rx_find_active(struct sci_port *s) return -1; } +static void sci_dma_rx_chan_invalidate(struct sci_port *s) +{ + unsigned int i; + + s->chan_rx = NULL; + for (i = 0; i < ARRAY_SIZE(s->cookie_rx); i++) + s->cookie_rx[i] = -EINVAL; + s->active_rx = 0; +} + static void sci_rx_dma_release(struct sci_port *s) { struct dma_chan *chan = s->chan_rx_saved; - s->chan_rx_saved = s->chan_rx = NULL; - s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL; + s->chan_rx_saved = NULL; + sci_dma_rx_chan_invalidate(s); dmaengine_terminate_sync(chan); dma_free_coherent(chan->device->dev, s->buf_len_rx * 2, s->rx_buf[0], sg_dma_address(&s->sg_rx[0])); @@ -1357,10 +1367,7 @@ static int sci_submit_rx(struct sci_port *s, bool port_lock_held) spin_lock_irqsave(&port->lock, flags); if (i) dmaengine_terminate_async(chan); - for (i = 0; i < 2; i++) - s->cookie_rx[i] = -EINVAL; - s->active_rx = 0; - s->chan_rx = NULL; + sci_dma_rx_chan_invalidate(s); sci_start_rx(port); if (!port_lock_held) spin_unlock_irqrestore(&port->lock, flags);