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Commit920de6ebfa(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>