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Re: [PATCH] acpi: Fix access to PM1 control and status registers
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From: |
Michael Tokarev |
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Subject: |
Re: [PATCH] acpi: Fix access to PM1 control and status registers |
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Date: |
Thu, 23 Jul 2020 15:54:18 +0300 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
01.07.2020 15:48, Anthony PERARD wrote:
> I actually tried, but when reading `addr` or `addr+1` I had the same
> value. So I guess `addr` wasn't taken into account.
AFAICS, these registers aren't actually supposed to be accessed like this
as addr+1. ACPI and ISA spec states multiple times that `addr' should be
accessible as 8/16/32 bits, but it does not mention `addr+1' or `addr+2'.
So far all now-rejected accesses we've seen (not that many but still) goes
to `addr', not to any other variation of it.
/mjt