linux-kernel - Re: [PATCH] usb: trancevibrator: simplify tv

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Date:   Wed, 20 Jul 2022 09:46:29 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     dzm91@...t.edu.cn
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, mudongliangabcd@...il.com
Subject: Re: [PATCH] usb: trancevibrator: simplify tv_probe

Le 20/07/2022 à 09:23, Dongliang Mu a écrit :
> From: Dongliang Mu <mudongliangabcd-Re5JQEeQqe8AvxtiuMwx3w@...lic.gmane.org>
> 
> The function tv_probe does not need to invoke kfree when the
> allocation fails. So let's simplify the code of tv_probe.
> Another change is to remove a redundant space.
> 
> Signed-off-by: Dongliang Mu <mudongliangabcd-Re5JQEeQqe8AvxtiuMwx3w@...lic.gmane.org>
> ---
>   drivers/usb/misc/trancevibrator.c | 13 +++----------
>   1 file changed, 3 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/usb/misc/trancevibrator.c b/drivers/usb/misc/trancevibrator.c
> index 26baba3ab7d7..30d4d774d448 100644
> --- a/drivers/usb/misc/trancevibrator.c
> +++ b/drivers/usb/misc/trancevibrator.c
> @@ -84,29 +84,22 @@ static int tv_probe(struct usb_interface *interface,
>   {
>   	struct usb_device *udev = interface_to_usbdev(interface);
>   	struct trancevibrator *dev;
> -	int retval;
>   
>   	dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL);
> -	if (!dev) {
> -		retval = -ENOMEM;
> -		goto error;
> -	}
> +	if (!dev)
> +		return -ENOMEM;
>   
>   	dev->udev = usb_get_dev(udev);
>   	usb_set_intfdata(interface, dev);
>   
>   	return 0;

Hi,

looks like:

error:
	kfree(dev);
	return retval;

at the end of the function can be removed as-well.

Just my 2c.

CJ