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[CPUFREQ] Longhaul - Check ACPI "BM DMA in progress" bit
authorRafał Bilski <rafalbilski@interia.pl>
Thu, 17 May 2007 20:39:02 +0000 (22:39 +0200)
committerDave Jones <davej@redhat.com>
Tue, 29 May 2007 20:56:39 +0000 (16:56 -0400)
commit489dc5cb18932d3cedaef03e84890475db17a843
tree32f97c945aa842daa8d7ffeccc6633c6377980eatree | snapshot
parent1b11d4ca6d9d7ea3ace9d241e52cc5fe3cfe3d8fcommit | diff
[CPUFREQ] Longhaul - Check ACPI "BM DMA in progress" bit

It is good idea to wait for PCI bus to become idle before
frequency change. Thanks to ACPI it is possible. It makes
sense only when northbridge support is in use because it is
only case in which we can disable arbiter after check if PCI
bus is busy.

Signed-off-by: Rafal Bilski <rafalbilski@interia.pl>
Signed-off-by: Dave Jones <davej@redhat.com>
arch/i386/kernel/cpu/cpufreq/longhaul.c diff | blob | history
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