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Subject: Re: [PATCH v3] powerpc/powernv: add NULL check after kzalloc in
 opal_add_one_export
To:     Oliver O'Halloran <oohall@gmail.com>,
        Qiujun Huang <hqjagain@gmail.com>,
        linuxppc-dev@lists.ozlabs.org
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Paul Mackerras <paulus@samba.org>,
        Thomas Gleixner <tglx@linutronix.de>
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From:   Markus Elfring <Markus.Elfring@web.de>
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Date:   Mon, 6 Apr 2020 12:02:11 +0200
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>>>> Here needs a NULL check.
>> quite obvious?

I suggest to consider another fine-tuning for the wording also around
such =E2=80=9Cobvious=E2=80=9D programming items.


>>> I find this change description questionable
>>> (despite of a reasonable patch subject).

I got further development concerns.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do=
cumentation/process/submitting-patches.rst?id=3Da10c9c710f9ecea87b9f4bbb83=
7467893b4bef01#n129

* Were changes mixed for different issues according to the diff code?

* I find it safer here to split specific changes into separate update step=
s
  for a small patch series.

* Will the addition of the desired null pointer check qualify for
  the specification of the tag =E2=80=9CFixes=E2=80=9D?


>>> Will a patch change log be helpful here?
>> I realized I should write some change log, and the change log was meani=
ngless.

Will any more adjustments happen for the discussed update suggestion
after the third patch version?


> The changelog is fine IMO. The point of a changelog is to tell a
> reader doing git archeology why a change happened and this is
> sufficent for that.

We might stumble on a different understanding for the affected =E2=80=9Cch=
ange logs=E2=80=9D.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do=
cumentation/process/submitting-patches.rst?id=3Da10c9c710f9ecea87b9f4bbb83=
7467893b4bef01#n751

Would you like to follow the patch evolution a bit easier?

Regards,
Markus