linux-kernel - Re: fpga: dfl: fme: Return directly after a failed devm_kasprintf() call in fme_perf_pmu

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Date: Wed, 31 Jan 2024 08:43:37 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Markus Elfring <Markus.Elfring@....de>
Cc: linux-fpga@...r.kernel.org, kernel-janitors@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Moritz Fischer <mdf@...nel.org>, Tom Rix <trix@...hat.com>,
	Wu Hao <hao.wu@...el.com>, Xu Yilun <yilun.xu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Kunwu Chan <chentao@...inos.cn>
Subject: Re: fpga: dfl: fme: Return directly after a failed devm_kasprintf()
 call in fme_perf_pmu_register()

On Tue, Jan 30, 2024 at 06:09:14PM +0100, Markus Elfring wrote:
> >> Thus return directly after a failed devm_kasprintf() call.
> >>
> >> Fixes: 724142f8c42a7 ("fpga: dfl: fme: add performance reporting support")
> >
> > This basically doesn't affect runtime because perf_pmu_register() checks
> > for NULL so no need for a Fixes tag.
> 
> I suggest to clarify this view a bit more also according to statements
> like the following.
> 
> 1. https://elixir.bootlin.com/linux/v6.8-rc2/source/kernel/events/core.c#L11532
>    perf_pmu_register:
>    …
> 	pmu->name = name;
>    …

The check is right before that on line 11527.

https://elixir.bootlin.com/linux/v6.8-rc2/source/kernel/events/core.c#L11527

regards,
dan carpenter