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[PATCH] PCI: Provide a boot parameter to disable MSI

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Several drivers are starting to grow options to disable MSI.  However,
it's often a host chipset issue, not something which individual drivers
should handle.  So we add the pci=nomsi kernel parameter to allow the user
to disable MSI modes for systems we haven't added to the quirk list yet.

Signed-off-by: Matthew Wilcox <[email protected]>
Signed-off-by: Randy Dunlap <[email protected]>
Acked-by: Jeff Garzik <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Matthew Wilcox 2006-03-05 22:33:34 -07:00 • committed by Greg Kroah-Hartman
commit 309e57df7b
5 changed files with 26 additions and 2 deletions
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4
Documentation/kernel-parameters.txt
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@ -49,6 +49,7 @@ restrictions referred to are that the relevant option is valid if:
MCA MCA bus support is enabled.
MDA MDA console support is enabled.
MOUSE Appropriate mouse support is enabled.
MSI Message Signaled Interrupts (PCI).
MTD MTD support is enabled.
NET Appropriate network support is enabled.
NUMA NUMA support is enabled.
@ -1152,6 +1153,9 @@ running once the system is up.
Mechanism 2.
nommconf [IA-32,X86_64] Disable use of MMCONFIG for PCI
Configuration
nomsi [MSI] If the PCI_MSI kernel config parameter is
enabled, this kernel boot option can be used to
disable the use of MSI interrupts system-wide.
nosort [IA-32] Don't sort PCI devices according to
order given by the PCI BIOS. This sorting is
done to get a device order compatible with