netdev - Re: [PATCHv5 net-next 15/31] iw_cxgb4: save the correct map length for fast_reg_page

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Date:	Mon, 10 Mar 2014 13:09:21 -0700
From:	Joe Perches <joe@...ches.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Hariprasad Shenai <hariprasad@...lsio.com>, netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org, davem@...emloft.net,
	roland@...estorage.com, dm@...lsio.com,
	swise@...ngridcomputing.com, leedom@...lsio.com,
	santosh@...lsio.com, kumaras@...lsio.com, nirranjan@...lsio.com
Subject: Re: [PATCHv5 net-next 15/31] iw_cxgb4: save the correct map length
 for fast_reg_page_lists

On Mon, 2014-03-10 at 23:43 +0300, Sergei Shtylyov wrote:
> Hello.
> 
> On 03/10/2014 08:08 PM, Hariprasad Shenai wrote:
> > From: Steve Wise <swise@...ngridcomputing.com>
> > We cannot save the mapped length using the rdma max_page_list_len field
> > of the ib_fast_reg_page_list struct because the core code uses it.  This
> > results in an incorrect unmap of the page list in c4iw_free_fastreg_pbl().
[]
> > diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c
[]
> > @@ -903,7 +903,11 @@ struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device,
> >   	dma_unmap_addr_set(c4pl, mapping, dma_addr);
> >   	c4pl->dma_addr = dma_addr;
> >   	c4pl->dev = dev;
> > -	c4pl->ibpl.max_page_list_len = pll_len;
> > +	c4pl->pll_len = pll_len;
> > +
> > +	PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %p\n",
> > +	     __func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list,
> > +	     (void *)c4pl->dma_addr);
> 
>     There's %pad format for printing dma_addr_t, no need to cast and use %p.

This would also probably give a gcc warning
when the sizeof a dma_addr_t is not the same
size as a void *.


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