linux-kernel - Re: [PATCH] USB-mxuport: Delete an unnecessary check before the function call "release

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Message-ID: <20150706103310.GC32202@localhost>
Date:	Mon, 6 Jul 2015 12:33:10 +0200
From:	Johan Hovold <johan@...nel.org>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johan Hovold <johan@...nel.org>, linux-usb@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] USB-mxuport: Delete an unnecessary check before the
 function call "release_firmware"

On Sun, Jun 28, 2015 at 03:09:00PM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 28 Jun 2015 14:59:04 +0200
> 
> The release_firmware() function tests whether its argument is NULL and then
> returns immediately. Thus the test around the call is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/usb/serial/mxuport.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
> index 460a406..92f7aee 100644
> --- a/drivers/usb/serial/mxuport.c
> +++ b/drivers/usb/serial/mxuport.c
> @@ -1101,8 +1101,7 @@ static int mxuport_probe(struct usb_serial *serial,
>  	 */
>  	usb_set_serial_data(serial, (void *)id->driver_info);
>  out:
> -	if (fw_p)
> -		release_firmware(fw_p);
> +	release_firmware(fw_p);
>  	return err;
>  }

You sent the exact same patch last year and it was rejected then as it
does not improve readability:

	https://www.marc.info/?l=linux-usb&m=141682024201419&w=3

So I'll drop this one again.

Johan
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