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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 726BCC43441 for ; Wed, 10 Oct 2018 16:55:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 228732077C for ; Wed, 10 Oct 2018 16:55:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="VQzOFXEr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 228732077C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727031AbeJKASU (ORCPT ); Wed, 10 Oct 2018 20:18:20 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:45850 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726515AbeJKASU (ORCPT ); Wed, 10 Oct 2018 20:18:20 -0400 Received: by mail-pl1-f194.google.com with SMTP id y15-v6so2806766plr.12 for ; Wed, 10 Oct 2018 09:55:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CsUazj8e/ZQvu767Lde9xfu4UDysKXiIgFVGUwQWDTU=; b=VQzOFXErf9dAQUoo77i5/5X2LefJhDDuTib3m5P7mygOk708bwxjo+kN274f+4a5Q/ XTY+lHhdZqqzwbHa9BWwH9CA9pOg79suyVd89TlzGtI6e6wUXMLaL05/vsX9tOSNYd6x SqdZm2lDenn4pkEUiw+Hx3Rtud0aTk6uMZ28g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CsUazj8e/ZQvu767Lde9xfu4UDysKXiIgFVGUwQWDTU=; b=NDh3dmRz7H4sKlTZYuGlQ1hR8dL0ZOVaLt/wk5KLlppqGsSZK77d2/CNyprWL5Lz8s VP344FkThsC/bSTynKtb+xP6s+bF8kupAearMqHTsAz8IKEkgNsLC5mRJnWOQy8lHR+d SaXVxbnhdpy4ZzSe49mtBKAz79XCJcI/piL2pdjtP2I8gYYaDZIhD2k4PxLQ2KrGmJ+4 KO8ERUvtBNtcsR28QMspa1OsLsmzuh9vvvLfqSQoeBV+F6CSCSDrVwOZ0j7VGsUlac1t BkZl+6ZYKWGPZQxdljD9mZO1unRoYDy4u0lUS1i5ar8LX1PDrUCQ9fbGVQuFmERIvxps WsyQ== X-Gm-Message-State: ABuFfohLCPlQSEuRjpHhg9MAgNVy4A0vSX1Q+vwi+ncmqdCPZhHYJ1op cB07FfFWxSwgO41AweBAnAXogx2aI5o= X-Google-Smtp-Source: ACcGV63W8Fi2YvaX8767dvN8DGWugpfDdb1Ii0+GAaZ9mNVkA4OW592PyxXZQN51dUuRr5a/wpdaDw== X-Received: by 2002:a17:902:8a4:: with SMTP id 33-v6mr34135506pll.65.1539190520234; Wed, 10 Oct 2018 09:55:20 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fed3:9637:a13a:6c15]) by smtp.gmail.com with ESMTPSA id k12-v6sm8961180pgo.34.2018.10.10.09.55.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 10 Oct 2018 09:55:19 -0700 (PDT) From: Stephen Boyd To: Dmitry Torokhov Cc: linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, Wolfram Sang Subject: [PATCH] Input: elants_i2c - Use DMA safe i2c when possible Date: Wed, 10 Oct 2018 09:55:17 -0700 Message-Id: <20181010165517.178545-1-swboyd@chromium.org> X-Mailer: git-send-email 2.19.0.605.g01d371f741-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This irq handler is always reading bytes from the device into a kmalloced buffer, so it's safe to mark this transaction as DMA safe. This avoids bouncing the buffer when an i2c controller decides to use DMA for a transaction. Cc: Wolfram Sang Signed-off-by: Stephen Boyd --- drivers/input/touchscreen/elants_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index d21ca39b0fdb..be44abb8de33 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -863,7 +863,7 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev) int i; int len; - len = i2c_master_recv(client, ts->buf, sizeof(ts->buf)); + len = i2c_master_recv_dmasafe(client, ts->buf, sizeof(ts->buf)); if (len < 0) { dev_err(&client->dev, "%s: failed to read data: %d\n", __func__, len); -- Sent by a computer through tubes