linux-kernel - Re: [PATCH] drivers/staging/vt6655/iwctl.c fix a sparse warning

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Date:	Wed, 26 Mar 2014 08:16:22 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jimmy Li <coder.liss@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Teodora Baluta <teobaluta@...il.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Michael Gunselmann <michael.gunselmann@...dium.uni-erlangen.de>,
	Lisa Nguyen <lisa@...apiadmin.com>,
	Martin Hofmann <martin.hofmann@...dium.uni-erlangen.de>,
	Malcolm Priestley <tvboxspy@...il.com>,
	Tülin İzer <tulinizer@...il.com>,
	Archana kumari <archanakumari959@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/staging/vt6655/iwctl.c fix a sparse warning

On Wed, 2014-03-26 at 00:42 -0700, Jimmy Li wrote:
> fix a sparse warning.
[]
> diff --git a/drivers/staging/vt6655/iwctl.c b/drivers/staging/vt6655/iwctl.c
[]
> @@ -1843,7 +1843,7 @@ int iwctl_siwencodeext(struct net_device *dev,
[]
>  	blen = sizeof(*param);
> -	buf = kmalloc((int)blen, (int)GFP_KERNEL);
> +	buf = kmalloc((int)blen, GFP_KERNEL);
>  	if (buf == NULL)
>  		return -ENOMEM;
>  	memset(buf, 0, blen);

Ideally, this would be

	buf = kzalloc(sizeof(*param), GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

removing the now unused blen variable declaration
and without the now unnecessary memset


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