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authorEric W. Biederman <ebiederm@xmission.com>2009-09-06 21:48:35 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-09-09 14:06:49 -0700
commit0ba379ec0fb182a87b8891c5754abbcd9c035b4f (patch)
treed2678b52e9e92a654f1997a9b6e891f47351c782 /drivers/pci/quirks.c
parentb1c089b7caf18905bd1d87136cf7b8c837254932 (diff)
downloadlinux-0ba379ec0fb182a87b8891c5754abbcd9c035b4f.tar.bz2
PCI: Simplify hotplug mch quirk.
There is a very old quirk for the intel E7502 E7320 and E7525 memory controller hubs that disables usage of msi interrupts on pcie hotplug bridges of those devices, and disables changing the affinity of irqs. Today all we have to do to disable msi on a specific device is to set dev->no_msi, which is much more straightforward than the previous logic. The re-running of this fixup after pci hotplug happens below these devices is totally bogus. All of the state we change is pure software state and we don't change the hardware at all. Which means hotplug on the lower devices doesn't have a chance to change this state. So we can safely remove the special case from the pciehp driver and the pcie portdriver. I suspect the special case was someone's expermental debug code that slipped in. Certainly it isn't mentioned in commit 6fb8880a61510295aece04a542767161f624dffe aka BKrev: 41966101LJ_ogfOU0m2aE6teZfQnuQ where the code first appears. Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 10731373d00e..e3034379a6c3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -31,8 +31,6 @@ int isa_dma_bridge_buggy;
EXPORT_SYMBOL(isa_dma_bridge_buggy);
int pci_pci_problems;
EXPORT_SYMBOL(pci_pci_problems);
-int pcie_mch_quirk;
-EXPORT_SYMBOL(pcie_mch_quirk);
#ifdef CONFIG_PCI_QUIRKS
/*
@@ -1500,7 +1498,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EESSC, quirk_a
static void __devinit quirk_pcie_mch(struct pci_dev *pdev)
{
- pcie_mch_quirk = 1;
+ pci_msi_off(pdev);
+ pdev->no_msi = 1;
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_pcie_mch);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch);