From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0699BC433E1 for ; Fri, 21 Aug 2020 16:14:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8F7722B4D for ; Fri, 21 Aug 2020 16:14:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="Ofdfivze" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726989AbgHUQOi (ORCPT ); Fri, 21 Aug 2020 12:14:38 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:37233 "EHLO mailout1.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726181AbgHUQON (ORCPT ); Fri, 21 Aug 2020 12:14:13 -0400 Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20200821161409euoutp018dee6e20e2ea3df1f47ae4400ec1da8e~tVJbCQhQh2432124321euoutp01N for ; Fri, 21 Aug 2020 16:14:09 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.w1.samsung.com 20200821161409euoutp018dee6e20e2ea3df1f47ae4400ec1da8e~tVJbCQhQh2432124321euoutp01N DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1598026449; bh=Dxb1SZqMxibqUhl7VyWNPNEmP5zeKa3acFNVfEqRw/o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OfdfivzeID+QoggnK8XOEVNIPQgAVgy9s/4/dsDxCMcelyYsqZ55fFVQAzWqAo9p1 LVDhQCO5AzEl4hiPYlEALMMCb3+8TEgq8qqFTFUEZtghWqtPG/6ypFp2gHHbMVzqaz 29WbXxGh/96oueBnmCJ50Xq98W9pV40VLuVbgGSI= Received: from eusmges3new.samsung.com (unknown [203.254.199.245]) by eucas1p2.samsung.com (KnoxPortal) with ESMTP id 20200821161408eucas1p2cafb7eeed6d5b4efac5898f5a39f8204~tVJaHwHFv1578115781eucas1p2l; Fri, 21 Aug 2020 16:14:08 +0000 (GMT) Received: from eucas1p1.samsung.com ( [182.198.249.206]) by eusmges3new.samsung.com (EUCPMTA) with SMTP id 05.B2.06318.0D2FF3F5; Fri, 21 Aug 2020 17:14:08 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20200821161407eucas1p23a283ac117d4381e087e9bacec537665~tVJZrBcp81823418234eucas1p2m; Fri, 21 Aug 2020 16:14:07 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20200821161407eusmtrp10acbb38b7aa0954ac61f8e63a2c5ccda~tVJZqYXBt1179011790eusmtrp19; Fri, 21 Aug 2020 16:14:07 +0000 (GMT) X-AuditID: cbfec7f5-371ff700000018ae-d5-5f3ff2d0fc0e Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id E2.B9.06017.FC2FF3F5; Fri, 21 Aug 2020 17:14:07 +0100 (BST) Received: from localhost (unknown [106.120.51.46]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20200821161407eusmtip2fe0ec413613697189cd2361948227403~tVJZdOHJ_2051720517eusmtip2n; Fri, 21 Aug 2020 16:14:07 +0000 (GMT) From: =?UTF-8?q?=C5=81ukasz=20Stelmach?= To: Kukjin Kim , Krzysztof Kozlowski , Andi Shyti , Mark Brown , linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: m.szyprowski@samsung.com, b.zolnierkie@samsung.com, =?UTF-8?q?=C5=81ukasz=20Stelmach?= Subject: [PATCH v2 8/9] spi: spi-s3c64xx: Increase transfer timeout Date: Fri, 21 Aug 2020 18:14:00 +0200 Message-Id: <20200821161401.11307-9-l.stelmach@samsung.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200821161401.11307-1-l.stelmach@samsung.com> MIME-Version: 1.0 Organization: Samsung R&D Institute Poland Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrIKsWRmVeSWpSXmKPExsWy7djPc7oXPtnHG/zv5LNY/OM5k8XGGetZ LaY+fMJm0f/4NbPF+fMb2C1uHlrBaLHp8TVWi8u75rBZzDi/j8mi8eNNdou1R+6yO3B7XF/y idlj06pONo/NS+o9+rasYvT4vEkugDWKyyYlNSezLLVI3y6BK2P19tfsBbs4KjoWTmZtYHzG 1sXIySEhYCJx7/hupi5GLg4hgRWMEicutjNDOF8YJX5NWsMEUiUk8JlR4sjmAJiO/b0HWSGK ljNKnN40hx3Cec4osa9pEStIFZuAo0T/0hNgVSICE5gkHp57A7aQWaBUomfnITBbWMBZ4sm9 /WA2i4CqxOsFe8FsXgFriZMr10IdKC/Rvnw7mM0pYCNx/FITK0SNoMTJmU9YQGx+AS2JNU3X WSDmy0s0b50N9oOEwCl2iUkNm6AGuUj8OL2LBcIWlnh1fAs7hC0jcXpyD1CcA8iul5g8yQyi t4dRYtucH1D11hJ3zv1iA6lhFtCUWL9LHyLsKDGleTczRCufxI23ghAn8ElM2jYdKswr0dEm BFGtIrGufw/UQCmJ3lcrGCcwKs1C8swsJA/MQti1gJF5FaN4amlxbnpqsXFearlecWJucWle ul5yfu4mRmBCOv3v+NcdjPv+JB1iFOBgVOLh/XHIPl6INbGsuDL3EKMEB7OSCK/T2dNxQrwp iZVVqUX58UWlOanFhxilOViUxHmNF72MFRJITyxJzU5NLUgtgskycXBKNTCevhMv8jHGVGdt ltSDdwfNdky64K45b3Js68rnHas+fdPlc4ljPCQ5JXbzvrQ4kdMXwjlPiK/dprROcPMvTWPr vF+Gjk0Lryd3LbcNDs38scrzv9bM63WbTr88PX2njuJcz75nBqWx1mI73v50eibgXXRuT/jZ RIctnS9+t5XlbYzcYzl3Zd0DJZbijERDLeai4kQAK4uuS0QDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrIIsWRmVeSWpSXmKPExsVy+t/xe7rnP9nHG9zZrGWx+MdzJouNM9az Wkx9+ITNov/xa2aL8+c3sFvcPLSC0WLT42usFpd3zWGzmHF+H5NF48eb7BZrj9xld+D2uL7k E7PHplWdbB6bl9R79G1ZxejxeZNcAGuUnk1RfmlJqkJGfnGJrVK0oYWRnqGlhZ6RiaWeobF5 rJWRqZK+nU1Kak5mWWqRvl2CXsbq7a/ZC3ZxVHQsnMzawPiMrYuRk0NCwERif+9B1i5GLg4h gaWMEvvbdrB0MXIAJaQkVs5Nh6gRlvhzrQusXkjgKaPE5ZY8EJtNwFGif+kJsF4RgRlMEk9u TGYFSTALlEtcmvWcHcQWFnCWeHJvP1gzi4CqxOsFe8FsXgFriZMr10IdIS/Rvnw7mM0pYCNx /FITK8Qya4ltiy+zQNQLSpyc+QTsNmYBdYn184RAwvwCWhJrmq6zQKyVl2jeOpt5AqPQLCQd sxA6ZiGpWsDIvIpRJLW0ODc9t9hIrzgxt7g0L10vOT93EyMw+rYd+7llB2PXu+BDjAIcjEo8 vD8O2ccLsSaWFVfmHmKU4GBWEuF1Ons6Tog3JbGyKrUoP76oNCe1+BCjKdCbE5mlRJPzgYkh ryTe0NTQ3MLS0NzY3NjMQkmct0PgYIyQQHpiSWp2ampBahFMHxMHp1QDo7xZd5Szt3//6eNX MxcLvvwbPD2Rp6T13+Lrisa/2VTmu7Iu1WK1bRFaUB3QssG843jhL2/x/ZPK4+efnxn81lcs O+9rh4/r/F5N8ZrerM0qU67fNJigMb3OrDDksETE6kc3BWUrXn9aYp0TarCM+R13vv3uKYp7 nj5ZohCxdXLSpYgrhgGPlFiKMxINtZiLihMBWyc9dNQCAAA= X-CMS-MailID: 20200821161407eucas1p23a283ac117d4381e087e9bacec537665 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20200821161407eucas1p23a283ac117d4381e087e9bacec537665 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200821161407eucas1p23a283ac117d4381e087e9bacec537665 References: <20200821161401.11307-1-l.stelmach@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Increase timeout by 30 ms for some wiggle and set the minimum value to 100 ms. This ensures a non-zero value for short transfers which may take less than 1 ms. The timeout value does not affect performance because it is used with a completion. Similar formula is used in other drivers e.g. sun4i, sun6i. Signed-off-by: Łukasz Stelmach --- drivers/spi/spi-s3c64xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 89c162efe355..ea5a22dec53d 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -473,7 +473,8 @@ static int s3c64xx_wait_for_dma(struct s3c64xx_spi_driver_data *sdd, /* millisecs to xfer 'len' bytes @ 'cur_speed' */ ms = xfer->len * 8 * 1000 / sdd->cur_speed; - ms += 10; /* some tolerance */ + ms += 30; /* some tolerance */ + ms = max(ms, 100); /* minimum timeout */ val = msecs_to_jiffies(ms) + 10; val = wait_for_completion_timeout(&sdd->xfer_completion, val); -- 2.26.2