netdev - RE: [PATCH net-next 2/4] gianfar: Fix and cleanup rxbd status handling

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Date:	Mon, 13 Jul 2015 07:43:59 +0000
From:	Manoil Claudiu <claudiu.manoil@...escale.com>
To:	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next 2/4] gianfar: Fix and cleanup rxbd status
 handling

> -----Original Message-----
> From: David Miller [mailto:davem@...emloft.net]
> Sent: Saturday, July 11, 2015 4:25 AM
> To: Manoil Claudiu-B08782
> Cc: netdev@...r.kernel.org
> Subject: Re: [PATCH net-next 2/4] gianfar: Fix and cleanup rxbd status
> handling
> 
> From: Claudiu Manoil <claudiu.manoil@...escale.com>
> Date: Thu, 9 Jul 2015 19:24:42 +0300
> 
> > @@ -2921,6 +2921,7 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q
> *rx_queue, int rx_work_limit)
> >  	i = rx_queue->next_to_clean;
> >
> >  	while (rx_work_limit--) {
> > +		unsigned long lstatus;
> >
> >  		if (cleaned_cnt >= GFAR_RX_BUFF_ALLOC) {
> >  			gfar_alloc_rx_buffs(rx_queue, cleaned_cnt);
> > @@ -2928,7 +2929,8 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q
> *rx_queue, int rx_work_limit)
> >  		}
> >
> >  		bdp = &rx_queue->rx_bd_base[i];
> > -		if (be16_to_cpu(bdp->status) & RXBD_EMPTY)
> > +		lstatus = be32_to_cpu(bdp->lstatus);
> > +		if (lstatus & BD_LFLAG(RXBD_EMPTY))
> >  			break;
> >
> >  		/* order rx buffer descriptor reads */
> 
> "lstatus" is not an "unsigned long", it's a "u32".
> 
> Don't use ambiguous types for objects with exact known sizes.

I agree, will send v2.  Maybe I thought it would be safe enough
since old "status" was "unsigned short", but I agree about dispelling
the ambiguity by using u32.  Thanks.

Claudiu
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