linux-kernel - RE: [PATCH 2/3] staging/rdma/hfi1: check return value of kcalloc

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Message-ID: <32E1700B9017364D9B60AED9960492BC259CD79F@fmsmsx120.amr.corp.intel.com>
Date:	Mon, 14 Dec 2015 15:21:24 +0000
From:	"Marciniszyn, Mike" <mike.marciniszyn@...el.com>
To:	Nicholas Mc Guire <hofrat@...dl.org>
CC:	Doug Ledford <dledford@...hat.com>,
	"Hefty, Sean" <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/3] staging/rdma/hfi1: check return value of kcalloc

> @@ -10129,6 +10129,9 @@ static void init_qos(struct hfi1_devdata *dd,
> u32 first_ctxt)
>  	if (num_vls * qpns_per_vl > dd->chip_rcv_contexts)
>  		goto bail;
>  	rsmmap = kcalloc(NUM_MAP_REGS, sizeof(u64), GFP_KERNEL);
> +	if (!rsmmap)
> +		goto bail;
> +

I checked out a linux-next remote at the next-20151214 tag.

The allocation method is clearly kmalloc_array() not kcalloc().

Where are you seeing the kcalloc()?

While it is tempting to allocate and zero, there is a chip rev specific difference.

Mike
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