https://github.com/torvalds/linux
Revision 455c0d71d46e86b0b7ff2c9dcfc19bc162302ee9 authored by Darrick J. Wong on 18 February 2010, 18:28:20 UTC, committed by Len Brown on 19 February 2010, 06:11:48 UTC
Earlier, Ingo Molnar posted a patch to make it so that the kernel would avoid
reading _PPC on his broken T60.  Unfortunately, it seems that with Thomas
Renninger's patch last July to eliminate _PPC evaluations when the processor
driver loads, the kernel never actually reads _PPC at all!  This is problematic
if you happen to boot your non-T60 computer in a state where the BIOS _wants_
_PPC to be something other than zero.

So, put the _PPC evaluation back into acpi_processor_get_performance_info if
ignore_ppc isn't 1.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: Len Brown <len.brown@intel.com>
1 parent f8b55f2
History
Tip revision: 455c0d71d46e86b0b7ff2c9dcfc19bc162302ee9 authored by Darrick J. Wong on 18 February 2010, 18:28:20 UTC
ACPI: Fix regression where _PPC is not read at boot even when ignore_ppc=0
Tip revision: 455c0d7
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