From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A63157462 for ; Thu, 3 Jul 2025 06:36:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751524562; cv=none; b=bcBayye2+u41H9EGBKwDW04jsPqIx8VSc+pcL3a/qbJt80CqiT7uHKECei0hZ2vGiVkS/hhgXwyNz7W37H9g2+ci7fD1xoz49A5QVafU/EiGjcHhjCgRcEZlQhsWfEIKiBiwBbavOFEqQoekBllZIgDOleS19yDDyWr6ClrmLkE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751524562; c=relaxed/simple; bh=YTVVnVJ6PdWC/AKl489gZ/2Sl6Au8Ca1tG/ODoK6oOA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YHI/L48pPjZlz/bgX/TgYsDUupsQyhmMHOf+sbiZ+2Ba23Ti35D9H1xg2GALD4nw8icB0b/1CphBNe5KusqTeycND+DAcra0YtzWRfMPY+S63sBt/D8ldEh5QAb01DZXgsBSfS6Ig/8aBcIL6Mxgyyd3EyNUrOX+uAecNXq5hZM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=aaoehm5M; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="aaoehm5M" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-22c33677183so66904965ad.2 for ; Wed, 02 Jul 2025 23:36:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1751524560; x=1752129360; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=QIKd4XyqKz0WFU05jsmNNatyFr3GWpnfNcV6WEt42xQ=; b=aaoehm5MJbBnlpjv9TaIa4TtSQnEdpiCcbI9jpOm/5BZQdWSofSDMXiURwceOFu3bl SqcbOPXY55pqqA6akly7udwdEjsVf+o5oFKcxs7QWjNIxeEFl2wCFjiPg9F/b/gIA9BQ 5otTV4xzaUaNeCR6bqZntfnPn4Muxg7WgV2uGn0iS1JklOvSxmuYZqBpNSNLH5QmI7mX itnq4R0nBW3TTv58Zh8uEgoCRg263PTXXGk2lIFDrRGCWZo7qsfVH74MwmeqXKNTyElU 0BnQiDXWVOLMpLAEHQrFJHAogCh2sAOvOX2kXl5/9esgUTpjEsEZm27vqodouyMVusVS b8NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751524560; x=1752129360; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=QIKd4XyqKz0WFU05jsmNNatyFr3GWpnfNcV6WEt42xQ=; b=WDw25JKyjiAfsKziY10L4NMWsZ1uR1QcK4w8hegSc+pILd+n2D6M2xCBv11OJnm1uK dppPypH2EBDu5nKVf1XIhDiW37Z9308ctrdGqsMrzOXzjt8abLe0SXdIkk6VpiBfvZKu SpzJTONtyKH529jzWeBddwt9G/ZaMF56LFFLSe/Og12iSOibEfI4M/mFx8S5fVxlBL3u GYgOvs5tBixlB5xOBHoC6j1P9t6lrkcbnNvajADbxctiXzcxIjDsIiG7OI2b6W92Rbir m5YsgcmCdO1skD2mDSlk5DCa20vLIVthjwa4ducga6rFkNBJpOE7EfrvilwenM1oLSbd wPZA== X-Forwarded-Encrypted: i=1; AJvYcCW0BMiGCr5b8WI9lUY6FYQQd7JuJpZ3hZtm/YkhWiRFlPQUtU2sLObqmtCDuWqfQ17z7x9kkv0vVGU=@vger.kernel.org X-Gm-Message-State: AOJu0YxlvteXe9f30xGyFe6BW857ysSLF95x7sNoKQ8OvWMayg/6UYl6 /VejGkxdEtmtir9BPt189FYCWxoyEFamF4PN8NgHc1936WQRdsXorCfMa+f8784MoD1SQ06F9gB Q8H4hDLo= X-Gm-Gg: ASbGncu25/H7UmrmYosDa4U1ljNTFBwa/wSDaO91xtrGBfI5kvVwKIAigS1cgGtuslh salbEKkdj+oYlXyhgtM8IvkS3bIm3tRBg5H3g996SFGkNBkGFHUMIC+qMMYseipEwGnPSckIdnr rWha/aIkpkR8UvGIOuKOJYneipzslf2PGu+L3gKv/KhTTxZ3OE2jci+owpGMiwLa8ZfwG0tyKEa oW9juOGbpD3ygq4lS+FH84Vpi79xy9LHIqlAInxGEWxe70rdK5V3RjSc9dhJwbXC0q9CMJryx24 Rgrq96BT9FbGCJyBvH1LHzTQk71tiBdIDvA72Wlp0d2ojHCZuqn10FR5IPKeUYEioWxhuA== X-Google-Smtp-Source: AGHT+IFVznHzewXkRwXl+jlpU+/jlWH9G3uXJOnEyYhJffoLUHYr+wecCaP0uvRb31laWEgyZwnmrw== X-Received: by 2002:a17:902:da91:b0:234:bfcb:5c21 with SMTP id d9443c01a7336-23c797b28efmr33182915ad.19.1751524559978; Wed, 02 Jul 2025 23:35:59 -0700 (PDT) Received: from sunil-laptop ([103.97.166.196]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23acb3ba5bdsm139341455ad.186.2025.07.02.23.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Jul 2025 23:35:59 -0700 (PDT) Date: Thu, 3 Jul 2025 12:05:51 +0530 From: Sunil V L To: Shuan He Cc: bhelgaas@google.com, cuiyunhui@bytedance.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC 0/1] PCI: Fix pci devices double register WARNING in the kernel starting process Message-ID: References: <20250702155112.40124-1-heshuan@bytedance.com> 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-Disposition: inline In-Reply-To: <20250702155112.40124-1-heshuan@bytedance.com> On Wed, Jul 02, 2025 at 11:51:11PM +0800, Shuan He wrote: > Hi All. > I encountered a WARNING printed out during the kernel starting process > on my developing environment. > (with RISC-V arch, 6.12 kernel, and Debian 13 OS). > > WARN Trace: > [ 0.518993] proc_dir_entry '000c:00/00.0' already registered > [ 0.519187] WARNING: CPU: 2 PID: 179 at fs/proc/generic.c:375 proc_register+0xf6/0x180 > [ 0.519214] [] proc_register+0xf6/0x180 > [ 0.519217] [] proc_create_data+0x3e/0x60 > [ 0.519220] [] pci_proc_attach_device+0x74/0x130 > [ 0.509991] [] pci_bus_add_device+0x42/0x100 > [ 0.509997] [] pci_bus_add_devices+0xc6/0x110 > [ 0.519230] [] acpi_pci_root_add+0x54c/0x810 > [ 0.519233] [] acpi_bus_attach+0x196/0x2f0 > [ 0.519234] [] acpi_scan_clear_dep_fn+0x30/0x70 > [ 0.519236] [] process_one_work+0x19a/0x390 > [ 0.519239] [] worker_thread+0x2be/0x420 > [ 0.519241] [] kthread+0xc4/0xf0 > [ 0.519243] [] ret_from_fork+0xe/0x1c > This should not happen. I suspect some issue in ACPI namespace/_PRT. Can you reproduce this on qemu virt machine? Regards Sunil