From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [217.72.192.78]) (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 7968070814; Fri, 31 Oct 2025 13:47:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.72.192.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761918458; cv=none; b=EsvmV/NzX/LB7yDWDqDI6Er3DuWVkNhrWFE1eIby+xD5CZ7kreeEnxeyG4sr6RUX8bjwXO9UgswnaeCCozhTtbSgWw5UpJ8z3ymi6w0LMnsMciQB6e0UKu3ESJLdCuz/hrPnBTXdQMGsP2ZuQvJAc2HD1YZUrcTsNtqhoBeH4AE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761918458; c=relaxed/simple; bh=RGf9cfCIhxuq/vaRuNGbk2qeO2YTTDICUdifwVGN2Ps=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=pA5+D3qg5+Caf/kcNdSQ3wjog04qXMh0XPVaqWQDMw9WSJ53cU/8uWbc/yXCcvXXr+BNinsu8/NaRcRZUm5TXymwQrOzQZB/vBKI7rYKdwRsqo1qhGqDIbLENC0iSYmBnX8U6G9wjiHlgcs3FiwQw2aSzJRYAY2/FKsqNdruD1Q= 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=spasswolf@web.de header.b=ShO+uEFY; arc=none smtp.client-ip=217.72.192.78 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=spasswolf@web.de header.b="ShO+uEFY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1761918441; x=1762523241; i=spasswolf@web.de; bh=eEf9FtMftpf7rRdhDbyeVWuCRJ8OhLV37hbp0uqbBD4=; h=X-UI-Sender-Class:Message-ID:Subject:From:To:Cc:Date:In-Reply-To: References:Content-Type:MIME-Version:Content-Transfer-Encoding:cc: content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=ShO+uEFYOmYlOgvsAsuB5M2OswcdOTiSek/gSQkissa60zfCH5rz0Yb0AFxwWYQx zbT8gxIpizohDkhQGHJOlm2sf2O5t7h5mmNeEBfF8QBZUHXEdcxnJqU6oSpNNBZlW H0GXf6y9diutdl7UitbJDgmwXtAxjiiHeB9npZi9YxePYiCoHLjJUPwLpNB9PEWGf Fuy/KYO4XyetNI2Wo2EPlakQjNpwsUwLoSMzpeQMmb98bYMnxtWJSaP4CPATXzpmQ D5JhTg9sOisvEOzgWoAo2CXY9tnglwLJjkXx2PHo5GN+7dhUXdrkqJrqS95xmvA8Q fJh0lUdppUaJpZBcgA== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.0.101] ([95.223.134.88]) by smtp.web.de (mrweb106 [213.165.67.124]) with ESMTPSA (Nemesis) id 1MMpCg-1vVOO52iRQ-00Tpm6; Fri, 31 Oct 2025 14:47:21 +0100 Message-ID: <26bf82303f661cdd34e4e8c16997e33eb21d1ee4.camel@web.de> Subject: Re: [REGRESSION 00/04] Crash during resume of pcie bridge From: Bert Karwatzki To: Christian =?ISO-8859-1?Q?K=F6nig?= , Mario Limonciello , linux-kernel@vger.kernel.org Cc: linux-next@vger.kernel.org, regressions@lists.linux.dev, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, "Rafael J . Wysocki" , spasswolf@web.de Date: Fri, 31 Oct 2025 14:47:20 +0100 In-Reply-To: References: <20251006120944.7880-1-spasswolf@web.de> <8edcc464-c467-4e83-a93b-19b92a2cf193@kernel.org> <4903e7c36adf377bcca289dbd3528055dc6cfb32.camel@web.de> <4a8302a0-209f-446a-9825-36cb267c1718@kernel.org> <25f36fa7-d1d6-4b81-a42f-64c445d6f065@amd.com> <1853e2af7f70cf726df278137b6d2d89d9d9dc82.camel@web.de> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.56.1-1+deb13u1 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:EjRqDMd/Z70FrDVz13IfKacOJSLO+KqbIRk3DhAnL3MhjrI/TPe hgag+npBPbfOJsus7sL7uxfamxeJGX78r2y0RV08TjDwY9RbUMx0eV0cLT+HviCHf5bX5ld ZarmhKmP7UOEhrN9vI44sDiwAZiDOWNNLitwP/Gm2pGXDFL0hl9GplQdCS8BUyXTCbI2Fop MU5nQv5zd+LR53ljbbAJA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:pzeKkoOKzOQ=;+MX7KvkhiMrJ7amnBNF6vIVRSnJ 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0JAQs2kVNdBzewupdy2vcZwGhVc8+olQ1RPX+3YQesOH0zehFJVHIqHd+2nKiYe8klrELpyfc zTu5JX1ILilo0rFUfB534fIiwTUKO22tgPN0xCOlTQntZaZXhkLMI8ubIUW6u6hvuAYHoTvZK ZCRcx4PHukzQpSW1cnDGsyT0ZEp6OXKv+1JgrrcsIQpLiHK9nKNtM+aaAMLMyvonIVCWwoJE8 B+vOoZkN7boHqq0ucpQdV7o4oGGtVlX7IyNBogDuWgRvuJnWpWf+UcqABO8GtO7bP9NzTuyxi DCgaTAulZX8QtDpNgivYdynlt7FiyEe6H0s0hjLhVrZ0yhtzqMsq2lH7JlipoBwvzJZvjGhPr jDYFg== Upon closer inspection I noticed that the PCIe bandwitdth has been reduced= : >=20 > [76621.870884] [ T140] pcieport 0000:01:00.0: Unable to change power = state from D3cold to D0, device inaccessible > [76621.870977] [ T140] pcieport 0000:02:00.0: Unable to change power = state from D3cold to D0, device inaccessible > [76621.876006] [ T140] pci_bus 0000:03: busn_res: [bus 03] is release= d > [76621.878237] [ T140] pci_bus 0000:02: busn_res: [bus 02-03] is rele= ased > [76621.879867] [ T140] pcieport 0000:00:01.1: pciehp: Slot(0): Card p= resent > [76621.879873] [ T140] pcieport 0000:00:01.1: pciehp: Slot(0): Link U= p > [76622.006565] [ T140] pci 0000:01:00.0: [1002:1478] type 01 class 0x= 060400 PCIe Switch Upstream Port > [76622.006606] [ T140] pci 0000:01:00.0: BAR 0 [mem 0xfcc00000-0xfcc0= 3fff] > [76622.006616] [ T140] pci 0000:01:00.0: PCI bridge to [bus 02-03] > [76622.006630] [ T140] pci 0000:01:00.0: bridge window [mem 0xfca00= 000-0xfcbfffff] > [76622.006644] [ T140] pci 0000:01:00.0: bridge window [mem 0xfc000= 00000-0xfe0fffffff 64bit pref] > [76622.006772] [ T140] pci 0000:01:00.0: PME# supported from D0 D3hot= D3cold The PCIe band with seems to be have been reduce to PCIe 1.0 (2.5GT/s): > [76622.006874] [ T140] pci 0000:01:00.0: 16.000 Gb/s available PCIe b= andwidth, limited by 2.5 GT/s PCIe x8 link at 0000:00:01.1 (capable of 126= .024 Gb/s with > 16.0 GT/s PCIe x8 link) >=20 > Bert Karwatzki This is the same message from system startup (here it's PCIe 3.0 (8.0GT/s)= , which is the PCIe version of the CPU (AMD Ryzen 7 5800H with Radeon Graphics)):=09 [ 0.289221] [ T1] pci 0000:01:00.0: 63.008 Gb/s available PCIe ban= dwidth, limited by 8.0 GT/s PCIe x8 link at 0000:00:01.1 (capable of 126.0= 24 Gb/s with 16.0 GT/s PCIe x8 link) Bert Karwatzki