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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 1F4BAC43381 for ; Fri, 22 Mar 2019 12:31:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E23CF2054F for ; Fri, 22 Mar 2019 12:31:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553257872; bh=98K35g9c2xarOfvm1FDLEJI3S3EZR9qLgmJocNaIwhU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dSnDFk5wCfG9RuaDiWcGTau8jNwF8SeZY81xXjsyxJV1/wJndlqGTVDl2z0vnynHa zuBW1AdYv/o+oUUzuBBNEfzfTMCzXF285jnLSv8J5t5HtrC3DaTgu9C0xYIGFj/XxI cgIa3pgdxSwBZLEWEFUqUqxpf+qKodzWUWrgBPKs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390156AbfCVMbG (ORCPT ); Fri, 22 Mar 2019 08:31:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:56578 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390160AbfCVMRj (ORCPT ); Fri, 22 Mar 2019 08:17:39 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BF86621900; Fri, 22 Mar 2019 12:17:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553257059; bh=98K35g9c2xarOfvm1FDLEJI3S3EZR9qLgmJocNaIwhU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XKFC0MUS/2GFt95SAvDkDztnG/3Q+/ggJ5EII++HtnCakbA2FK7Z5XBGR6HfxmhHY g9kFLSEWxdENcoMhKberGRxVJIEK0RXLtb8i1YA5ouj2LLKDB/ubrhaygeqvFoyAnn TFLI8/TjGUHvGVSosy4MHGCOwvQ4Hy/BGFs8Ku8c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Osipenko , Sowjanya Komatineni , Wolfram Sang Subject: [PATCH 5.0 118/238] i2c: tegra: update maximum transfer size Date: Fri, 22 Mar 2019 12:15:37 +0100 Message-Id: <20190322111305.478168444@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190322111258.383569278@linuxfoundation.org> References: <20190322111258.383569278@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sowjanya Komatineni commit b03ff2a23359d0dd6f0a1516c6a9e9c4760ed230 upstream. Tegra194 supports maximum 64K bytes per packet including 12 bytes of packet header irrespective of PIO or DMA mode transfer. This patch updates Tegra194 max write length to account for packet header size for transfers. Cc: stable@vger.kernel.org # 4.20+ Reviewed-by: Dmitry Osipenko Signed-off-by: Sowjanya Komatineni Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/busses/i2c-tegra.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -118,6 +118,9 @@ #define I2C_MST_FIFO_STATUS_TX_MASK 0xff0000 #define I2C_MST_FIFO_STATUS_TX_SHIFT 16 +/* Packet header size in bytes */ +#define I2C_PACKET_HEADER_SIZE 12 + /* * msg_end_type: The bus control which need to be send at end of transfer. * @MSG_END_STOP: Send stop pulse at end of transfer. @@ -836,12 +839,13 @@ static const struct i2c_algorithm tegra_ /* 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 - 12, + .max_read_len = SZ_4K, + .max_write_len = SZ_4K - I2C_PACKET_HEADER_SIZE, }; static const struct i2c_adapter_quirks tegra194_i2c_quirks = { .flags = I2C_AQ_NO_ZERO_LEN, + .max_write_len = SZ_64K - I2C_PACKET_HEADER_SIZE, }; static const struct tegra_i2c_hw_feature tegra20_i2c_hw = {