Re: [PATCH v2 0/3] kselftest: Add test to report device log errors

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Jul 05, 2024 at 07:29:53PM -0400, Nícolas F. R. A. Prado wrote:
> Log errors are the most widely used mechanism for reporting issues in
> the kernel. When an error is logged using the device helpers, eg
> dev_err(), it gets metadata attached that identifies the subsystem and
> device where the message is coming from. This series makes use of that
> metadata in a new test to report which devices logged errors.
> 
> The first two patches move a test and a helper script to keep things
> organized before this new test is added in the third patch.
> 
> It is expected that there might be many false-positive error messages
> throughout the drivers code which will be reported by this test. By
> having this test in the first place and working through the results we
> can address those occurrences by adjusting the loglevel of the messages
> that turn out to not be real errors that require the user's attention.
> It will also motivate additional error messages to be introduced in the
> code to detect real errors where they turn out to be missing, since
> it will be possible to detect said issues automatically.
> 
> As an example, below you can see the test result for
> mt8192-asurada-spherion. The single standing issue has been investigated
> and will be addressed in an EC firmware update [1]:
> 
> TAP version 13
> 1..1
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `model_name' property: -6
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `energy_full_design' property: -6
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
>  power_supply sbs-8-000b: driver failed to report `time_to_empty_now' property: -5
> not ok 1 +power_supply:sbs-8-000b
>  Totals: pass:0 fail:1 xfail:0 xpass:0 skip:0 error:0
> 
> [1] https://lore.kernel.org/all/cf4d8131-4b63-4c7a-9f27-5a0847c656c4@notapiano
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>