From patchwork Mon Jul 23 20:26:12 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 947982 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 41ZChx0S1rz9s1x for ; Tue, 24 Jul 2018 06:27:29 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388289AbeGWV3y (ORCPT ); Mon, 23 Jul 2018 17:29:54 -0400 Received: from sauhun.de ([88.99.104.3]:51256 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388149AbeGWV3w (ORCPT ); Mon, 23 Jul 2018 17:29:52 -0400 Received: from localhost (p54B3377D.dip0.t-ipconnect.de [84.179.55.125]) by pokefinder.org (Postfix) with ESMTPSA id 9EE2A631A4C; Mon, 23 Jul 2018 22:26:57 +0200 (CEST) From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Wolfram Sang , Laxman Dewangan , Thierry Reding , Jonathan Hunter , linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 08/12] i2c: tegra: use core to detect 'no zero length' quirk Date: Mon, 23 Jul 2018 22:26:12 +0200 Message-Id: <20180723202617.15230-9-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180723202617.15230-1-wsa+renesas@sang-engineering.com> References: <20180723202617.15230-1-wsa+renesas@sang-engineering.com> Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org And don't reimplement in the driver. Signed-off-by: Wolfram Sang Acked-by: Jon Hunter --- Only build tested. drivers/i2c/busses/i2c-tegra.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 60c8561fbe65..437294ea2f0a 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -684,9 +684,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, tegra_i2c_flush_fifos(i2c_dev); - if (msg->len == 0) - return -EINVAL; - i2c_dev->msg_buf = msg->buf; i2c_dev->msg_buf_remaining = msg->len; i2c_dev->msg_err = I2C_ERR_NONE; @@ -831,6 +828,7 @@ static const struct i2c_algorithm tegra_i2c_algo = { /* payload size is only 12 bit */ static const struct i2c_adapter_quirks tegra_i2c_quirks = { + .flags = I2C_AQ_NO_ZERO_LEN, .max_read_len = 4096, .max_write_len = 4096, };