[Bug 218686] Fail to set energy_performance_preference of amd processor on asus ga403uv

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218686

derp (vderp@icloud.com) changed:

           What    |Removed                     |Added
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                 CC|                            |vderp@icloud.com

--- Comment #89 from derp (vderp@icloud.com) ---
after testing v2 of the patch on my
[   26.705565] Hardware name: ASUSTeK COMPUTER INC. ASUS Zenbook 14
UM3406HA_UM3406HA/UM3406HA, BIOS UM3406HA.304 06/05/2024

I found it to crash with

[    3.384772] UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1117:9
[    3.384774] shift exponent 64 is too large for 64-bit type 'long unsigned
int'

the reason turned out to be: auto_sel_reg real type was ACPI_TYPE_INTEGER(with
value 0x1) and cpc_write isn't guarded against ACPI_TYPE_INTEGER value-only
registers and performs invalid operation

by ignoring auto_sel_reg entirely, I gained a working CPPC, which inspired v3
of the patch

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