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=-10.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 6046BC4361B for ; Wed, 9 Dec 2020 10:58:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 134B1233FA for ; Wed, 9 Dec 2020 10:58:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730221AbgLIK6X (ORCPT ); Wed, 9 Dec 2020 05:58:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:55304 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726885AbgLIK6X (ORCPT ); Wed, 9 Dec 2020 05:58:23 -0500 Date: Wed, 9 Dec 2020 11:58:59 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1607511463; bh=lE2hjSyoVcF2LDUfNoY3QBReJngq5pOO/Rein7/SFtM=; h=From:To:Cc:Subject:References:In-Reply-To:From; b=WI7o12lnqtdHVvU+Z2njNFAZNhJ6Wb4yIJoD5AjvhOn//+xsmLfv+DJxsjp0oVp9S QoKFUu8mQG0qZ/2W4urd82wsZP2HCH07XZLQ8Dm9ZJsX5pRr+XMZl23E5ZK0Awc6CR O2PvKJg3itMmvyMb2xa6JRgT3OydnINzrP4xrBDw= From: Greg KH To: Christian Eggers Cc: krzk@kernel.org, o.rempel@pengutronix.de, u.kleine-koenig@pengutronix.de, Sudip Mukherjee , wsa@kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v5.4] i2c: imx: Check for I2SR_IAL after every byte Message-ID: References: <20201209093431.15561-1-ceggers@arri.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201209093431.15561-1-ceggers@arri.de> Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Wed, Dec 09, 2020 at 10:34:31AM +0100, Christian Eggers wrote: > commit 1de67a3dee7a279ebe4d892b359fe3696938ec15 upstream. > > Arbitration Lost (IAL) can happen after every single byte transfer. If > arbitration is lost, the I2C hardware will autonomously switch from > master mode to slave. If a transfer is not aborted in this state, > consecutive transfers will not be executed by the hardware and will > timeout. > > Signed-off-by: Christian Eggers > Tested (not extensively) on Vybrid VF500 (Toradex VF50): > Tested-by: Krzysztof Kozlowski > Acked-by: Oleksij Rempel > Cc: stable@vger.kernel.org > --- > Hi Greg, > > here is the patch for linux-5.4. Please let me know if this doesn't apply to > older kernels. That worked everywhere, thanks. greg k-h