Re: [PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array()

From	"Rafael J. Wysocki" <rafael@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array()
Date	2016-07-01 23:50 +0200
Message-ID	<rQetY-3mA-23@gated-at.bofh.it> (permalink)
References	<rQeaB-3g8-7@gated-at.bofh.it> <rQeaB-3g8-13@gated-at.bofh.it> <rQeaB-3g8-21@gated-at.bofh.it> <rQekh-3jb-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Fri, Jul 1, 2016 at 11:36 PM, Al Stone <ahs3@redhat.com> wrote:
> On 07/01/2016 03:25 PM, Rafael J. Wysocki wrote:
>> On Fri, Jul 1, 2016 at 11:21 PM, Al Stone <ahs3@redhat.com> wrote:
>>> The static function acpi_parse_entries_array() is provided an array of
>>> type struct acpi_subtable_proc that has a callback function and a count.
>>> The count should reflect how many times the callback has been successfully
>>> called.  However, the current code only increments the 0th element of the
>>> array, regardless of the number of entries in the array, or which callback
>>> has been invoked.  The fix is to use the index into the array, instead of
>>> a pointer to the beginning of the array.
>>
>> OK, so it would be good to say what the consequences of the problem are too.
>>
>
> Hrm.  So replace the last sentence with something like:
>
>    The fix is to use the index into the array, instead of
>    a pointer to the beginning of the array, so that the count
>    for each element in the array in incremented by the
>    corresponding callback.
>
> That feels a little clunky but is it closer to what you were
> thinking?

Well, not really.

The code is arguably incorrect, but is there anything that does not
work as expected as a result?  Any functional breakage?  Any
misleading messages printed?

Thread

[PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array() Al Stone <ahs3@redhat.com> - 2016-07-01 23:30 +0200
  Re: [PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-01 23:30 +0200
    Re: [PATCH 1/3] ACPI: fix incorrect counts returned by  acpi_parse_entries_array() Al Stone <ahs3@redhat.com> - 2016-07-01 23:40 +0200
      Re: [PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-01 23:50 +0200
        Re: [PATCH 1/3] ACPI: fix incorrect counts returned by  acpi_parse_entries_array() Al Stone <ahs3@redhat.com> - 2016-07-02 00:00 +0200
          Re: [PATCH 1/3] ACPI: fix incorrect counts returned by acpi_parse_entries_array() "Rafael J. Wysocki" <rafael@kernel.org> - 2016-07-02 00:10 +0200
            Re: [PATCH 1/3] ACPI: fix incorrect counts returned by  acpi_parse_entries_array() Al Stone <ahs3@redhat.com> - 2016-07-02 00:40 +0200

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