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 4553CCDB483 for ; Tue, 17 Oct 2023 07:10:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234522AbjJQHKV (ORCPT ); Tue, 17 Oct 2023 03:10:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229666AbjJQHKU (ORCPT ); Tue, 17 Oct 2023 03:10:20 -0400 Received: from bmailout1.hostsharing.net (bmailout1.hostsharing.net [83.223.95.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CABEA8E; Tue, 17 Oct 2023 00:10:17 -0700 (PDT) Received: from h08.hostsharing.net (h08.hostsharing.net [IPv6:2a01:37:1000::53df:5f1c:0]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.hostsharing.net", Issuer "RapidSSL Global TLS RSA4096 SHA256 2022 CA1" (verified OK)) by bmailout1.hostsharing.net (Postfix) with ESMTPS id D6555300000A6; Tue, 17 Oct 2023 09:10:14 +0200 (CEST) Received: by h08.hostsharing.net (Postfix, from userid 100393) id CE0DA4DD3C9; Tue, 17 Oct 2023 09:10:14 +0200 (CEST) Date: Tue, 17 Oct 2023 09:10:14 +0200 From: Lukas Wunner To: Ricky WU Cc: Kai-Heng Feng , "bhelgaas@google.com" , "linux-pm@vger.kernel.org" , "linux-mmc@vger.kernel.org" , Kees Cook , Tony Luck , "Guilherme G. Piccoli" , "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] PCI: pciehp: Prevent child devices from doing RPM on PCIe Link Down Message-ID: <20231017071014.GA4592@wunner.de> References: <20231016040132.23824-1-kai.heng.feng@canonical.com> <20231016093210.GA22952@wunner.de> <24f72eea9fba45c4b1cd85836b17f251@realtek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <24f72eea9fba45c4b1cd85836b17f251@realtek.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [cc -= unrelated mailing lists bpf, kernel-hardening] On Tue, Oct 17, 2023 at 05:44:13AM +0000, Ricky WU wrote: > > From: Kai-Heng Feng > > On Mon, Oct 16, 2023 at 5:32???PM Lukas Wunner wrote: > > > On Mon, Oct 16, 2023 at 12:01:31PM +0800, Kai-Heng Feng wrote: > > > > When inserting an SD7.0 card to Realtek card reader, it can trigger > > > > PCI slot Link down and causes the following error: > > > > > > Why does *inserting* a card cause a Link Down? > > > > Ricky, do you know the reason why Link Down happens? > > Because SD7.0 card is use pcie-nvme driver, reader need to re-link > then just do the pcie channel I don't quite follow. I don't see a pcie-nvme driver in Linus' current master branch. Which driver are you referring to? What does "re-link" mean? Rebind to a different driver? Thanks, Lukas