From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [212.227.17.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D72EB1B0F14; Tue, 18 Feb 2025 09:01:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739869284; cv=none; b=bVmduIGr1ZXGvlAf8w8EZ44CJAipMetfw1m3KtGvFKVJholT4+1EnsegQrITz9ZSVGJcypOjgB82DIsVS85OhwF7eQg4JOAxfcqLLRz3hFAHWITTy8vmdst5Zyi+ZPpD7su4V7+iJZWoKxL6W9iLh4AT5MX4RyhtCUQJgac0wEo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739869284; c=relaxed/simple; bh=mYRhqbQzxki7e9cqUCTEnLpx0IJ1POrXuTHg2ZLhxwM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=CB1lT28mpd4ddrhdqKmS6h4idmJ9qkLEoTrT1Onw8vXkmLyWDFptYgG+mAcVPmL7jrsA9evgUXODwVFseccSlbpeYtamAAcfynNQNznr9rJllAzBdtAlzaTOsXUJJlE/WWhfNtptJ8H3Ak+asJNzZBQWDoBuO1kemD0dovAreb0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de; spf=pass smtp.mailfrom=web.de; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b=RG/hHpJy; arc=none smtp.client-ip=212.227.17.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=web.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b="RG/hHpJy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1739869245; x=1740474045; i=markus.elfring@web.de; bh=XIeNWUy0i7uKVdam6OUW5o/JfhKLq3GrDaCwK/XHy98=; h=X-UI-Sender-Class:Message-ID:Date:MIME-Version:Subject:To:Cc: References:From:In-Reply-To:Content-Type: Content-Transfer-Encoding:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=RG/hHpJySDz831Uj5zWPWGlIsuIqBwmozAov4IWV/Sjh7kpJfEX6LaCr/0PM5oQb eRMBqJrpysVeem095LBuMrngsVqIMzHfo6l4aTcUE1Lk9xDHu3NKJsTxUrqTvxxpL ce0UNOVeAtwN0gROJVH5hn1EztYlVLYXp4GiPxeZIUw/YAQVjR4VzibGZMbohNr+b 23nvJ5xt0Y+cHCb2KNbJqDDg5VTST0/BzGz+4lqfQICh+N4Fpvl4aBU2tr3DTUG64 CbAkAC9rpVmxtwODMF+QJ6HDXZjI6/To+0stZlrB+M4snHS8LfQRrDMK0syUnZjA2 iquGTVZx5jyv0B7sgQ== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.178.29] ([94.31.93.27]) by smtp.web.de (mrweb106 [213.165.67.124]) with ESMTPSA (Nemesis) id 1MgzaR-1t8EYT4BVF-00nyEH; Tue, 18 Feb 2025 10:00:45 +0100 Message-ID: Date: Tue, 18 Feb 2025 10:00:33 +0100 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] PCI/portdrv: Add necessary wait for disabling hotplug events To: Feng Tang , linux-pci@vger.kernel.org, Bjorn Helgaas , Guanghui Feng , Liguang Zhang , Lukas Wunner , "Rafael J. Wysocki" , Sathyanarayanan Kuppuswamy Cc: LKML , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Jonathan Cameron References: <20250218034859.40397-1-feng.tang@linux.alibaba.com> Content-Language: en-GB From: Markus Elfring In-Reply-To: <20250218034859.40397-1-feng.tang@linux.alibaba.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:URoPd7SSVS0FDea57bTR/aB8zElF/OAqEYqB9SpmWYwapHv3qQr 0xmHo9SAAF6sOPjf2IYGWXkocBrF/PabCPPEr1IqgNc743xwTmYXkXYXPGfBOkYjK5HGNkI ITBPALIEgu8LTgw3srzmvrqola32cf4ed7IRV4HUJZz2g29BeFoRWO1mTvY/BkR9J/IhTCx wdC1VyghJnKFkFf0MwX7Q== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:C3/VnsiLiBE=;hVmDWSBCuF4JBVmDfHp2CfgN5PN LLKSqKME0DFbsuAEAemApAx37H/Q20y5HR6Nl/hPP9iSbWmdAYIohdAEOO38F5Epf0Beax6sM s5h8LPdT0U+4I7mJ+CWqQGvaxIh/kga4nXmxmIDcGwWRjWmG6jYNfJvnXFFjG1iVBW3JCZs4R cSl8+vbW7MdOI9a5b+mGC+Ca4HxF2Adtrdk7XJB8Y1B3d9AmN+beyWUET6KXhA7rQHhTOCjbX lPFVy/0JyjUOC1BLfNnyi8RzU9AijBk1MJ0J/6MMhW7yQksEMjn1dg8MVJnxfMS+ORd6/2Q6U 47/Rb929jjsc7KEhM9ddRmsKgtWuIaqmD+SWyH6CGJSO6Gi+0rAHgdo6vBwBAEVzS7mxSNXFZ oE+vEuVTCIeTTlARrf/tqW9UPTL5KBUc2b9jglLVH9jjdspry/G3EUM9yV7wGP2EVpCwkCSwV BMWcqm7hcjx5GAN8zBMxtAhz6q3ak5igukPpat3Yw2KvvDgC2dbKTat0frBdRaH0CpRQoDyVz MPOzlrodOOj0xbyoXUNVNcovGck19o0K924xu40S/JmdSS01ItmNt5juL9W5FGKWuSYXmvi7V xzNGYxXxulbIvKBXicIWa5NOmwAPrcqdjzZWvh5Hd6rrbeF4K9Z9cRQw1yEQyrAAWmkv4er6v I2ayvYh5Kxoas5pGbWjIL/2jwjt01uxtUpNLZBQRcARIDFhQuHfhXIaRKiLZ8nQwO38hnlTkE aTOB1Y25J3NCcgGgF7P7eKRz6ATfPO18vZFj8QRJwtNM1kRTpxKyA8nmzWy/11YQ8FUQAHlVk Cx2eIlkiLTq23lMw4nzgxVYuYgdvJttgFQVp6/J0cx7CP+lrUsxPwLqMPt8kcfy7KJqC7/297 uiCri3hJ4xobkQH/eQ7kiiaXuMp4ICD/C+blBvQSzYshBhmTIl93Ek5LXF/nQicjJf8vAUzoP HXWJDdrhsLlrrocNVJTjUdMdUIEOSQ1s2/gWceINTOS37gePseq3Ea2tyzTW23CWQglOmHI27 dDNHM0G2gAAFqs81sUhHJvmm9oQu03IZoc+/DasVgCs4Hs6hnIbutNXfOKxba7N146eYzqops n8Z7Dr0dMBP5w4QVC8K/V6wNHuYMpneIWR+jRrsEK7DsW1LHpjL31dMFcFuaRweq0vpoLChxV CYdF0zgR8F29SnTFVdYdI+qkFvqAhwf/yAlIOIhEJyWEpldCY6n1z3O4umi2wV+tJri0XjhVT k8YucL2NmPYsoWV1+b/U3Ec/E0a9ugiR24Gd6n6AW8f+rx0VjoEpqhQDF7fIaIgqLmqWwo+DE E51EvPbLQ/d96CF8v8gRoDhpi6x5Wp76w8DyDd+1RLrR70BAyk+6FQ3XgpSoagS5ITLF6JUs+ SQJvviJb1YhIZ4AjrG4530S+noHqcKx0vWqmOfpFsbrgsZHB79s6js63h0tFnruVUV3iG6l73 w4+RNebexGnlgtu8iqHRCfo7P+mM= > There was problem reported by firmware developers that they received > 2 pcie link control commands in very short intervals on an ARM server, > which doesn't comply with pcie spec, and broke their state machine and > work flow. According to PCIe 6.1 spec, section 6.7.3.2, software needs Would you like to use key words in consistent ways also in such a change d= escription? > to wait at least 1 second for the command-complete event, before > resending the cmd or =E2=80=A6 command? =E2=80=A6 > --- > Changlog: > > since v1: =E2=80=A6 Are cover letters generally desirable for patch series? Regards, Markus