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| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-03-05 00:30:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-05 07:57:50 -0800 |
| commit | f5f2b13129a6541debf8851bae843cbbf48298b7 (patch) | |
| tree | 274dc998519074e56259a7dc4bd611652b8d930e /drivers/pci/quirks.c | |
| parent | 58a53b246b4aed95f3f93b45828c8d9f26b1cfcb (diff) | |
| download | blackbird-op-linux-f5f2b13129a6541debf8851bae843cbbf48298b7.tar.gz blackbird-op-linux-f5f2b13129a6541debf8851bae843cbbf48298b7.zip | |
[PATCH] msi: sanely support hardware level msi disabling
In some cases when we are not using msi we need a way to ensure that the
hardware does not have an msi capability enabled. Currently the code has been
calling disable_msi_mode to try and achieve that. However disable_msi_mode
has several other side effects and is only available when msi support is
compiled in so it isn't really appropriate.
Instead this patch implements pci_msi_off which disables all msi and msix
capabilities unconditionally with no additional side effects.
pci_disable_device was redundantly clearing the bus master enable flag and
clearing the msi enable bit. A device that is not allowed to perform bus
mastering operations cannot generate intx or msi interrupt messages as those
are essentially a special case of dma, and require bus mastering. So the call
in pci_disable_device to disable msi capabilities was redundant.
quirk_pcie_pxh also called disable_msi_mode and is updated to use pci_msi_off.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 1bf548287564..7f94fc098cd3 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1438,8 +1438,8 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quir */ static void __devinit quirk_pcie_pxh(struct pci_dev *dev) { - disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI), - PCI_CAP_ID_MSI); + pci_msi_off(dev); + dev->no_msi = 1; printk(KERN_WARNING "PCI: PXH quirk detected, " |
