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| author | Mike Galbraith <umgwanakikbuti@gmail.com> | 2016-06-23 09:45:42 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-06-24 00:09:51 +0300 |
| commit | 3c67a829bd45f99b5c03580bb898c99fcc023356 (patch) | |
| tree | 5dde03a2ac8ccde18a2ef3c6c800dd3f63c6e2e6 /drivers/cpufreq/pcc-cpufreq.c | |
| parent | 33688abb2802ff3a230bd2441f765477b94cc89e (diff) | |
| download | linux-3c67a829bd45f99b5c03580bb898c99fcc023356.tar.xz | |
cpufreq: pcc-cpufreq: Fix doorbell.access_width
Commit 920de6ebfab8 (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: 920de6ebfab8 (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>
Diffstat (limited to 'drivers/cpufreq/pcc-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/pcc-cpufreq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index 808a320e9d5d..a7ecb9a84c15 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -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, " |