From: Yinghai Lu <yinghai@kernel.org>
To: Jesse Barnes <jbarnes@virtuousgeek.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Tony Luck <tony.luck@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, Yinghai Lu <yinghai@kernel.org>
Subject: [PATCH 10/13] PCI: Strict checking of valid range for bridge
Date: Fri, 27 Jan 2012 18:49:28 -0800 [thread overview]
Message-ID: <1327718971-9598-11-git-send-email-yinghai@kernel.org> (raw)
In-Reply-To: <1327718971-9598-1-git-send-email-yinghai@kernel.org>
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 <yinghai@kernel.org>
---
drivers/pci/probe.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 83df3fb..e12f65f0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -791,6 +791,33 @@ reduce_needed_size:
return ret;
}
+static int __devinit pci_bridge_check_busn_res(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: %06llx-%06llx\n",
+ secondary, subordinate,
+ (unsigned long long)bus->busn_res.start,
+ (unsigned long long)bus->busn_res.end);
+ ret = allocate_resource(&bus->busn_res, &busn_res,
+ (subordinate - secondary + 1),
+ (pci_domain_nr(bus)<<8) | secondary,
+ (pci_domain_nr(bus)<<8) | 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
next prev parent reply other threads:[~2012-01-28 2:51 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-28 2:49 [PATCH -v2 0/13] PCI: allocate pci bus num range for unassigned bridge busn Yinghai Lu
2012-01-28 2:49 ` [PATCH 01/13] PCI: Add iobusn_resource Yinghai Lu
2012-01-28 2:49 ` [PATCH 02/13] PCI: Add busn_res operation functions Yinghai Lu
2012-01-30 15:28 ` Bjorn Helgaas
2012-01-30 18:32 ` Yinghai Lu
2012-01-28 2:49 ` [PATCH 03/13] PCI: Add busn_res tracking in core Yinghai Lu
2012-01-30 15:35 ` Bjorn Helgaas
2012-01-30 18:39 ` Yinghai Lu
2012-01-28 2:49 ` [PATCH 04/13] PCI, x86: Register busn_res for root buses Yinghai Lu
2012-01-28 2:49 ` [PATCH 05/13] PCI, ia64: " Yinghai Lu
2012-01-28 2:49 ` [PATCH 06/13] PCI, powerpc: " Yinghai Lu
2012-01-30 15:44 ` Bjorn Helgaas
2012-01-28 2:49 ` [PATCH 07/13] PCI, parisc: " Yinghai Lu
2012-01-28 2:49 ` [PATCH 08/13] PCI: Add pci_bus_extend/shrink_top() Yinghai Lu
2012-01-30 15:50 ` Bjorn Helgaas
2012-01-30 18:42 ` Yinghai Lu
2012-01-28 2:49 ` [PATCH 09/13] PCI: Probe safe range that we can use for unassigned bridge Yinghai Lu
2012-01-30 15:59 ` Bjorn Helgaas
2012-01-30 18:51 ` Yinghai Lu
2012-01-28 2:49 ` Yinghai Lu [this message]
2012-01-30 16:04 ` [PATCH 10/13] PCI: Strict checking of valid range for bridge Bjorn Helgaas
2012-01-30 18:52 ` Yinghai Lu
2012-01-28 2:49 ` [PATCH 11/13] PCI: Allocate bus range instead of use max blindly Yinghai Lu
2012-01-28 2:49 ` [PATCH 12/13] PCI: kill pci_fixup_parent_subordinate_busnr() Yinghai Lu
2012-01-30 16:09 ` Bjorn Helgaas
2012-01-28 2:49 ` [PATCH 13/13] PCI: Seperate child bus scanning to two passes overall Yinghai Lu
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