linux-kernel - Re: [PATCH 5/5] IB/qib: Adjust two size determinations in qib_init

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Date:   Wed, 5 Apr 2017 18:15:26 +0300
From:   Yuval Shaia <yuval.shaia@...cle.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-rdma@...r.kernel.org, Doug Ledford <dledford@...hat.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Mike Marciniszyn <infinipath@...el.com>,
        Sean Hefty <sean.hefty@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 5/5] IB/qib: Adjust two size determinations in
 qib_init_pportdata()

On Wed, Apr 05, 2017 at 05:04:35PM +0200, SF Markus Elfring wrote:
> >> @@ -270,13 +268,14 @@ int qib_init_pportdata(struct qib_pportdata *ppd, struct qib_devdata *dd,
> >>  	if (!ppd->congestion_entries)
> >>  		goto bail_1;
> >>  
> >> -	size = sizeof(struct cc_table_shadow);
> >> -	ppd->ccti_entries_shadow = kzalloc(size, GFP_KERNEL);
> >> +	ppd->ccti_entries_shadow = kzalloc(sizeof(*ppd->ccti_entries_shadow),
> >> +					   GFP_KERNEL);
> >>  	if (!ppd->ccti_entries_shadow)
> >>  		goto bail_2;
> >>  
> >> -	size = sizeof(struct ib_cc_congestion_setting_attr);
> >> -	ppd->congestion_entries_shadow = kzalloc(size, GFP_KERNEL);
> >> +	ppd->congestion_entries_shadow = kzalloc(sizeof(*ppd
> >> +							->congestion_entries_shadow),
> >> +						 GFP_KERNEL);
> > 
> > Not related to this patch but is related to your patch-set - can you check
> > the array allocations in lines 264 and 268?
> 
> Do you refer to source code places here which are affected by the update step
> "[PATCH 4/5] IB/qib: Use kcalloc() in qib_init_pportdata()"?

Oops, please ignore.

> 
> 
> > Besides that:
> > Reviewed-by: Yuval Shaia <yuval.shaia@...cle.com>
> 
> Do you find the proposed change for the shown data types really acceptable
> in these function calls?

I found that the fix brings no harm to the existing code.

> 
> Regards,
> Markus