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cpufreq: pcc-cpufreq: Fix doorbell.access_width

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Commit 920de6ebfa (ACPICA: Hardware: Enhance
acpi_hw_validate_register() with access_width/bit_offset awareness)
apparently exposed a latent bug, doorbell.access_width is initialized
to 64, but per Lv Zheng, it should be 4, and indeed, making that
change does bring pcc-cpufreq back to life.

Fixes: 920de6ebfa (ACPICA: Hardware: Enhance acpi_hw_validate_register() with access_width/bit_offset awareness)
Suggested-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mike Galbraith 2016-06-23 08:45:42 +02:00 committed by Rafael J. Wysocki
parent 33688abb28
commit 3c67a829bd
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/pcc-cpufreq.c
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@ -487,7 +487,7 @@ static int __init pcc_cpufreq_probe(void)
doorbell.space_id = reg_resource->space_id;
doorbell.bit_width = reg_resource->bit_width;
doorbell.bit_offset = reg_resource->bit_offset;
doorbell.access_width = 64;
doorbell.access_width = 4;
doorbell.address = reg_resource->address;
pr_debug("probe: doorbell: space_id is %d, bit_width is %d, "