netdev - Re: [PATCH 2/2] qlcnic: Remove redundant NULL check on kfree().

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Message-ID: <20120410074959.GA4393@mwanda>
Date:	Tue, 10 Apr 2012 10:49:59 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	santosh nayak <santoshprasadnayak@...il.com>
Cc:	anirban.chakraborty@...gic.com, rajesh.borundia@...gic.com,
	sony.chacko@...gic.com, linux-driver@...gic.com,
	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 2/2] qlcnic: Remove redundant NULL check on kfree().

On Mon, Apr 09, 2012 at 11:41:19AM +0530, santosh nayak wrote:
> From: Santosh Nayak <santoshprasadnayak@...il.com>
> 
> kfree() checks for NULL before freeing the memory.
> Remove redundant NULL check.
> This is just a clean up and also looks good from performance point of view.

I doubt it has any impact on performance.

[snip]

>  static void qlcnic_free_lb_filters_mem(struct qlcnic_adapter *adapter)
>  {
> -	if (adapter->fhash.fmax && adapter->fhash.fhead)
> -		kfree(adapter->fhash.fhead);
> -
> +	kfree(adapter->fhash.fhead);

This changes how the code works.  That's very sloppy to not notice
that.  If you did notice it, it should be justified in the
changelog.  :(

>  	adapter->fhash.fhead = NULL;
>  	adapter->fhash.fmax = 0;
>  }

regards,
dan carpenter
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