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[79.185.232.187]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-54d6e5e524csm129527e87.182.2025.04.18.01.29.29 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Fri, 18 Apr 2025 01:29:30 -0700 (PDT) Date: Fri, 18 Apr 2025 10:29:26 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: linux-pci@vger.kernel.org, Bjorn Helgaas Cc: linux-kernel@vger.kernel.org, regressions@lists.linux.dev Subject: [REGRESSION 6.14] Some PCI device BARs inacessible Message-ID: <20250418102926.690ac42c@foxbook> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Hi, This is a heads up that an apparent PCI regression has been reported and mistakenly assigned to USB in the kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=220016 Visible symptom is missing USB devices, but the whole controller fails to probe, apparently due to devm_request_mem_region() returning NULL, see drivers/usb/core/hcd-pci.c and usb_hcd_pci_probe(). Same systems also show a similar failure with some AHCI controller. It seems specific to particular ASUS AMD motherboards. Somebody found that disabling CONFIG_PCI_REALLOC_ENABLE_AUTO helps. That's all I know, reporters can be reached via bugzilla. Regards, Michal