From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932275Ab3EGENr (ORCPT ); Tue, 7 May 2013 00:13:47 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.122]:9852 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932889Ab3EGD6p (ORCPT ); Mon, 6 May 2013 23:58:45 -0400 X-Authority-Analysis: v=2.0 cv=cOZiQyiN c=1 sm=0 a=rXTBtCOcEpjy1lPqhTCpEQ==:17 a=mNMOxpOpBa8A:10 a=Ciwy3NGCPMMA:10 a=627E-fS9MMsA:10 a=5SG0PmZfjMsA:10 a=bbbx4UPp9XUA:10 a=meVymXHHAAAA:8 a=7Jupn-8awV8A:10 a=VwQbUJbxAAAA:8 a=20KFwNOVAAAA:8 a=1XWaLZrsAAAA:8 a=P3f3k1vR-OQB382XG1EA:9 a=LI9Vle30uBYA:10 a=jEp0ucaQiEUA:10 a=UTB_XpHje0EA:10 a=jeBq3FmKZ4MA:10 a=rXTBtCOcEpjy1lPqhTCpEQ==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 74.67.115.198 Message-Id: <20130507035842.766865390@goodmis.org> User-Agent: quilt/0.60-1 Date: Mon, 06 May 2013 23:57:23 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Matthew Whitehead , Yinghai Lu , Bjorn Helgaas Subject: [011/126] EISA/PCI: Init EISA early, before PNP References: <20130507035712.909872333@goodmis.org> Content-Disposition: inline; filename=0011-EISA-PCI-Init-EISA-early-before-PNP.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.6.11.3 stable review patch. If anyone has any objections, please let me know. ------------------ From: Yinghai Lu [ Upstream commit c5fb301ae83bec6892e54984e6ec765c47df8e10 ] Matthew reported kernels fail the pci_eisa probe and are later successful with the virtual_eisa_root_init force probe without slot0. The reason for that is: PNP probing is before pci_eisa_init gets called as pci_eisa_init is called via pci_driver. pnp 00:0f has 0xc80 - 0xc84 reserved. [ 9.700409] pnp 00:0f: [io 0x0c80-0x0c84] so eisa_probe will fail from pci_eisa_init ==>eisa_root_register ==>eisa_probe path. as force_probe is not set in pci_eisa_root, it will bail early when slot0 is not probed and initialized. Try to use subsys_initcall_sync instead, and will keep following sequence: pci_subsys_init pci_eisa_init_early pnpacpi_init/isapnp_init After this patch EISA can be initialized properly, and PNP overlapping resource will not be reserved. [ 10.104434] system 00:0f: [io 0x0c80-0x0c84] could not be reserved Reported-by: Matthew Whitehead Tested-by: Matthew Whitehead Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas Cc: stable@vger.kernel.org Signed-off-by: Steven Rostedt --- drivers/eisa/pci_eisa.c | 39 +++++++++++++++++++++------------------ 1 file changed, 21 insertions(+), 18 deletions(-) diff --git a/drivers/eisa/pci_eisa.c b/drivers/eisa/pci_eisa.c index cdae207..d4cd56a 100644 --- a/drivers/eisa/pci_eisa.c +++ b/drivers/eisa/pci_eisa.c @@ -19,8 +19,7 @@ /* There is only *one* pci_eisa device per machine, right ? */ static struct eisa_root_device pci_eisa_root; -static int __init pci_eisa_init(struct pci_dev *pdev, - const struct pci_device_id *ent) +static int __init pci_eisa_init(struct pci_dev *pdev) { int rc; @@ -45,22 +44,26 @@ static int __init pci_eisa_init(struct pci_dev *pdev, return 0; } -static struct pci_device_id pci_eisa_pci_tbl[] = { - { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_BRIDGE_EISA << 8, 0xffff00, 0 }, - { 0, } -}; +/* + * We have to call pci_eisa_init_early() before pnpacpi_init()/isapnp_init(). + * Otherwise pnp resource will get enabled early and could prevent eisa + * to be initialized. + * Also need to make sure pci_eisa_init_early() is called after + * x86/pci_subsys_init(). + * So need to use subsys_initcall_sync with it. + */ +static int __init pci_eisa_init_early(void) +{ + struct pci_dev *dev = NULL; + int ret; -static struct pci_driver __refdata pci_eisa_driver = { - .name = "pci_eisa", - .id_table = pci_eisa_pci_tbl, - .probe = pci_eisa_init, -}; + for_each_pci_dev(dev) + if ((dev->class >> 8) == PCI_CLASS_BRIDGE_EISA) { + ret = pci_eisa_init(dev); + if (ret) + return ret; + } -static int __init pci_eisa_init_module (void) -{ - return pci_register_driver (&pci_eisa_driver); + return 0; } - -device_initcall(pci_eisa_init_module); -MODULE_DEVICE_TABLE(pci, pci_eisa_pci_tbl); +subsys_initcall_sync(pci_eisa_init_early); -- 1.7.10.4