From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Markus Elfring <Markus.Elfring@web.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, kernel-janitors@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
linux-mediatek@lists.infradead.org,
Matthias Brugger <matthias.bgg@gmail.com>,
Colin Ian King <colin.king@canonical.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: usb: mtu3: Checking initialisation of the variable “mep” in two functions
Date: Mon, 29 Jun 2020 09:48:13 +0800 [thread overview]
Message-ID: <1593395293.3798.3.camel@mhfsdcap03> (raw)
In-Reply-To: <8efdb7aa-1188-e94a-3075-ab1dd30768bb@web.de>
Hi,
On Sat, 2020-06-27 at 14:28 +0200, Markus Elfring wrote:
> Hello,
>
> A source code analysis approach by the means of the semantic patch language
> (Coccinelle software) pointed an implementation detail out for further
> development considerations.
>
> The functions “mtu3_gadget_ep_set_halt” and “mtu3_gadget_ep_set_wedge” check
> at the beginning if the input parameter “ep” is a null pointer.
> The error code “-EINVAL” will be returned then.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/mtu3/mtu3_gadget.c?id=1590a2e1c681b0991bd42c992cabfd380e0338f2#n371
> https://elixir.bootlin.com/linux/v5.7.2/source/drivers/usb/mtu3/mtu3_gadget.c#L371
>
> Can it be nicer to assign the variable “mep” only after a successful check
> instead of an initialisation before?
Yes, I'll fix it, thanks a lot
>
> Regards,
> Markus
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prev parent reply other threads:[~2020-06-29 1:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-27 12:28 usb: mtu3: Checking initialisation of the variable “mep” in two functions Markus Elfring
2020-06-29 1:48 ` Chunfeng Yun [this message]
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