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From: Maninder Singh <maninder1.s-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
To: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
	"roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org"
	<roland-BHEL68pLQRGGvPXPguhicg@public.gmane.org>,
	Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	Moni Shoua <monis-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	"jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org"
	<jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
	Yishai Hadas <yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	"eranbe-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org"
	<eranbe-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
	Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	linux-kernel
	<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	PANKAJ MISHRA <pankaj.m-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH 1/1] infiniband: Remove redundant NULL check before kfree
Date: Wed, 08 Jul 2015 04:23:33 +0000 (GMT)	[thread overview]
Message-ID: <1037392254.437811436329408244.JavaMail.weblogic@ep2mlwas06a> (raw)

Hello,

>> +			for (i = 0; i < dev->caps.num_ports; i++)
>> +				kfree(dm[i]);
>> 			goto out;
>> 		}
>> 	}
>> --
>> 1.7.9.5
>> 
>
>If you are going to change this, you might as well make it 100% correct:
>
>i—-;
>while (i >= 0)
>	kfree(dm[i]);
>
>Then you don’t have to worry about whether kfree works on NULL, every item you free will be guaranteed to be non-NULL.
Thanks for suggestion :)
Sent new patch with described changes, I was thinking one more thing.

In below code :-
        if (!ibdev->sriov.is_going_down)
            queue_work(ibdev->sriov.demux[i].ud_wq, &dm[i]->work);
        spin_unlock_irqrestore(&ibdev->sriov.going_down_lock, flags);
    }
out:
    kfree(dm);
    return;

dm is freed after queue_work, is it correct to free dm when other dm[i] are allocated ? i did not get it.

Thanks
Maninder
------------

             reply	other threads:[~2015-07-08  4:23 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-08  4:23 Maninder Singh [this message]
2015-07-08 22:24 ` [PATCH 1/1] infiniband: Remove redundant NULL check before kfree Doug Ledford
  -- strict thread matches above, loose matches on Subject: below --
2015-06-26  7:09 Maninder Singh
2015-07-07 18:53 ` Doug Ledford
     [not found] ` <1435302547-40904-1-git-send-email-maninder1.s-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2015-07-09 17:06   ` Christoph Lameter

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