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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53A10C433EF for ; Mon, 13 Jun 2022 10:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243316AbiFMKcS (ORCPT ); Mon, 13 Jun 2022 06:32:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344083AbiFMK2u (ORCPT ); Mon, 13 Jun 2022 06:28:50 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E002E252AC; Mon, 13 Jun 2022 03:20:17 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 07DD060B8B; Mon, 13 Jun 2022 10:20:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1242FC34114; Mon, 13 Jun 2022 10:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655115616; bh=du0eATYz8AcUzrUh6DHs+n4PUByRCeS13TXKdzW3pbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YqUgSzmJlG4ha6fEe1TFP+rhRO2cXxAyjero6msk5uEquRad35yNS6rHPW4EhJTag tCFE64uqKnecTMO4tXogrZNRfjAQyeV3k4sn2ofi/xC0GaGWxnA1kE2eb+3nbKXd8Q 7crpQwGpMFZFNERjvReS55HlLU0C+nkprukXy2Og= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lucas Tanure , Michal Simek , Wolfram Sang , Sasha Levin Subject: [PATCH 4.9 128/167] i2c: cadence: Increase timeout per message if necessary Date: Mon, 13 Jun 2022 12:10:02 +0200 Message-Id: <20220613094910.870657093@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094840.720778945@linuxfoundation.org> References: <20220613094840.720778945@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lucas Tanure [ Upstream commit 96789dce043f5bff8b7d62aa28d52a7c59403a84 ] Timeout as 1 second sets an upper limit on the length of the transfer executed, but there is no maximum length of a write or read message set in i2c_adapter_quirks for this controller. This upper limit affects devices that require sending large firmware blobs over I2C. To remove that limitation, calculate the minimal time necessary, plus some wiggle room, for every message and use it instead of the default one second, if more than one second. Signed-off-by: Lucas Tanure Acked-by: Michal Simek Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-cadence.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c index 23ee1a423654..a29ac9bae6d5 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -511,7 +511,7 @@ static void cdns_i2c_master_reset(struct i2c_adapter *adap) static int cdns_i2c_process_msg(struct cdns_i2c *id, struct i2c_msg *msg, struct i2c_adapter *adap) { - unsigned long time_left; + unsigned long time_left, msg_timeout; u32 reg; id->p_msg = msg; @@ -536,8 +536,16 @@ static int cdns_i2c_process_msg(struct cdns_i2c *id, struct i2c_msg *msg, else cdns_i2c_msend(id); + /* Minimal time to execute this message */ + msg_timeout = msecs_to_jiffies((1000 * msg->len * BITS_PER_BYTE) / id->i2c_clk); + /* Plus some wiggle room */ + msg_timeout += msecs_to_jiffies(500); + + if (msg_timeout < adap->timeout) + msg_timeout = adap->timeout; + /* Wait for the signal of completion */ - time_left = wait_for_completion_timeout(&id->xfer_done, adap->timeout); + time_left = wait_for_completion_timeout(&id->xfer_done, msg_timeout); if (time_left == 0) { cdns_i2c_master_reset(adap); dev_err(id->adap.dev.parent, -- 2.35.1