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| author | Jarred White <jarredwhite@linux.microsoft.com> | 2024-04-09 08:23:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 17:35:30 +0300 |
| commit | 5cfdf783323fa4f3990314509317d880982c5305 (patch) | |
| tree | e596a717b12e233b5529fef62a47eb67e926f008 /crypto | |
| parent | 6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1 (diff) | |
| download | linux-5cfdf783323fa4f3990314509317d880982c5305.tar.xz | |
ACPI: CPPC: Fix bit_offset shift in MASK_VAL() macro
commit 05d92ee782eeb7b939bdd0189e6efcab9195bf95 upstream.
Commit 2f4a4d63a193 ("ACPI: CPPC: Use access_width over bit_width for
system memory accesses") neglected to properly wrap the bit_offset shift
when it comes to applying the mask. This may cause incorrect values to be
read and may cause the cpufreq module not be loaded.
[ 11.059751] cpu_capacity: CPU0 missing/invalid highest performance.
[ 11.066005] cpu_capacity: partial information: fallback to 1024 for all CPUs
Also, corrected the bitmask generation in GENMASK (extra bit being added).
Fixes: 2f4a4d63a193 ("ACPI: CPPC: Use access_width over bit_width for system memory accesses")
Signed-off-by: Jarred White <jarredwhite@linux.microsoft.com>
Cc: 5.15+ <stable@vger.kernel.org> # 5.15+
Reviewed-by: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions