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 BC836C2FC04 for ; Thu, 17 Aug 2023 03:18:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347798AbjHQDSX (ORCPT ); Wed, 16 Aug 2023 23:18:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347816AbjHQDST (ORCPT ); Wed, 16 Aug 2023 23:18:19 -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 94A631724 for ; Wed, 16 Aug 2023 20:18:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 29DC363850 for ; Thu, 17 Aug 2023 03:18:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09E49C433C7; Thu, 17 Aug 2023 03:18:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692242297; bh=i5UDWEST6Iodtn/RFBSq3TRb/25kRWUgxsnalcwMP8s=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=pyVZap/wkaI9ku8a6GySSBKjpB7GFAME2V7JaWykuEv0vn97ZfNF0hh4Srj+xcFv9 BOjHIzm+TF9x5J9XBzC9phrMRxsCe9t9eBRLl1ZTzk1bqNI9J+uYUJU1VaogbevVrm LUkAIiHjsmEgvHGwVRPqNf7PGXTTJYRNsoW2iPBWrWxFuDBRloWxeH7oqc9oxWnLkX nceoSH2UHWHaVne1bERgtq/J4O0eUSir1NY9SZDXIF/sKYLlYVwpXsPXNSzNRIS66y AFzbRZcXd2lgdKBo9j/7c903EhDNBYCvpUNqf70yg/nzMaeN/C8x8ALi/ItF91g2dp OsLJ/VOpPUoQA== Date: Wed, 16 Aug 2023 20:18:16 -0700 From: Jakub Kicinski To: Alfred Lee Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, andrew@lunn.ch, olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, sgarzare@redhat.com, AVKrasnov@sberdevices.ru Subject: Re: [PATCH net v3] net: dsa: mv88e6xxx: Wait for EEPROM done before HW reset Message-ID: <20230816201816.29bea470@kernel.org> In-Reply-To: <20230815001323.24739-1-l00g33k@gmail.com> References: <20230815001323.24739-1-l00g33k@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 14 Aug 2023 17:13:23 -0700 Alfred Lee wrote: > If the switch is reset during active EEPROM transactions, as in > just after an SoC reset after power up, the I2C bus transaction > may be cut short leaving the EEPROM internal I2C state machine > in the wrong state. When the switch is reset again, the bad > state machine state may result in data being read from the wrong > memory location causing the switch to enter unexpected mode > rendering it inoperational. I'll apply this instead of the v4: https://lore.kernel.org/all/20230815220453.32035-1-l00g33k@gmail.com/ since you dropped Andrew's tag :( Please make sure you keep the tags you were given.