Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965456Ab2B1CL3 (ORCPT ); Mon, 27 Feb 2012 21:11:29 -0500 Received: from rcsinet15.oracle.com ([148.87.113.117]:43203 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756014Ab2B1CLY (ORCPT ); Mon, 27 Feb 2012 21:11:24 -0500 From: Yinghai Lu To: Jesse Barnes , Benjamin Herrenschmidt , Tony Luck Cc: Bjorn Helgaas , Dominik Brodowski , Andrew Morton , Linus Torvalds , Greg Kroah-Hartman , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu Subject: [PATCH 12/18] PCI: Strict checking of valid range for bridge Date: Mon, 27 Feb 2012 18:10:03 -0800 Message-Id: <1330395009-29260-13-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1330395009-29260-1-git-send-email-yinghai@kernel.org> References: <1330395009-29260-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] X-CT-RefId: str=0001.0A090203.4F4C37C6.0003,ss=1,re=0.000,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1492 Lines: 52 children bridges busn range should be able to be allocated from parent bus range. to avoid overlapping between sibling bridges on same bus. Signed-off-by: Yinghai Lu --- drivers/pci/probe.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index d483a3d..1d36a2a 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -794,6 +794,30 @@ reduce_needed_size: return ret; } +static int __devinit pci_bridge_check_busn_broken(struct pci_bus *bus, + struct pci_dev *dev, + int secondary, int subordinate) +{ + int broken = 0; + + struct resource busn_res; + int ret; + + memset(&busn_res, 0, sizeof(struct resource)); + dev_printk(KERN_DEBUG, &dev->dev, + "check if busn %02x-%02x is in busn_res: %pR\n", + secondary, subordinate, &bus->busn_res); + ret = allocate_resource(&bus->busn_res, &busn_res, + (subordinate - secondary + 1), + secondary, subordinate, + 1, NULL, NULL); + if (ret) + broken = 1; + else + release_resource(&busn_res); + + return broken; +} /* * If it's a bridge, configure it and scan the bus behind it. * For CardBus bridges, we don't scan behind as the devices will -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/