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| author | Srinivas Pandruvada | 2019-03-25 17:04:39 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki | 2019-03-25 23:57:21 +0100 |
| commit | edef1ef134180149694b86386277076f566d165c (patch) | |
| tree | 6538951169dd5373f32d09b8a316be312a9758d7 /drivers/staging/erofs | |
| parent | Linux 5.1-rc2 (diff) | |
| download | kernel-qcow2-linux-edef1ef134180149694b86386277076f566d165c.tar.gz kernel-qcow2-linux-edef1ef134180149694b86386277076f566d165c.tar.xz kernel-qcow2-linux-edef1ef134180149694b86386277076f566d165c.zip | |
ACPI / CPPC: Fix guaranteed performance handling
As per the ACPI specification, "Guaranteed Performance Register" is
a "Buffer" field and it cannot be "Integer", so treat the "Integer"
type for "Guaranteed Performance Register" field as invalid and
ignore its value in that case.
Also save one cpc_read() call when "Guaranteed Performance Register"
is not present, which means a register defined as:
"Register(SystemMemory, 0, 0, 0, 0)".
Fixes: 29523f095397 ("ACPI / CPPC: Add support for guaranteed performance")
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: 4.20+ <stable@vger.kernel.org> # 4.20+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/staging/erofs')
0 files changed, 0 insertions, 0 deletions