linux-kernel - Re: [PATCH RESEND] kunit: string-stream: Allow ERR_PTR to be passed to string_stream

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Message-ID: <CABVgOS=bd5Udd9fKfzEGOikCG8KJLdG=NZ70KL9pm-NvNhKipw@mail.gmail.com>
Date:   Fri, 1 Dec 2023 11:34:15 +0800
From:   David Gow <davidgow@...gle.com>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc:     brendan.higgins@...ux.dev, rmoar@...gle.com,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, patches@...nsource.cirrus.com
Subject: Re: [PATCH RESEND] kunit: string-stream: Allow ERR_PTR to be passed
 to string_stream_destroy()

On Mon, 30 Oct 2023 at 18:47, Richard Fitzgerald
<rf@...nsource.cirrus.com> wrote:
>
> Check the stream pointer passed to string_stream_destroy() for
> IS_ERR_OR_NULL() instead of only NULL.
>
> Whatever alloc_string_stream() returns should be safe to pass
> to string_stream_destroy(), and that will be an ERR_PTR.
>
> It's obviously good practise and generally helpful to also check
> for NULL pointers so that client cleanup code can call
> string_stream_destroy() unconditionally - which could include
> pointers that have never been set to anything and so are NULL.
>
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> ---

Yeah, this makes sense, and let's support NULL as well.

Reviewed-by: David Gow <davidgow@...gle.com>

Cheers,
-- David

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