linux-kernel - Re: [PATCH 1/8] Staging: vme_ca91cx42: fix compiler warning on 64-bit build

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Message-ID: <1292249768.1673.6.camel@leonhard>
Date:	Mon, 13 Dec 2010 23:16:08 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Martyn Welch <martyn.welch@...com>,
	"'devel@...verdev.osuosl.org'" <devel@...verdev.osuosl.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/8] Staging: vme_ca91cx42: fix compiler warning on
 64-bit build

2010-12-13 (월), 14:50 +0100, Jiri Slaby:
> On 12/13/2010 02:16 PM, Namhyung Kim wrote:
> > @@ -867,13 +869,13 @@ ssize_t ca91cx42_master_read(struct vme_master_resource *image, void *buf,
> >  	 * maximal configured data cycle is used and splits it
> >  	 * automatically for non-aligned addresses.
> >  	 */
> > -	if ((int)addr & 0x1) {
> > +	if (check_aligned(addr, 0x1)) {
> >  		*(u8 *)buf = ioread8(addr);
> >  		done += 1;
> >  		if (done == count)
> >  			goto out;
> >  	}
> > -	if ((int)addr & 0x2) {
> > +	if (check_aligned(addr, 0x2)) {
> 
> It should be IS_ALIGNED(addr, 2) and IS_ALIGNED(addr, 4) respectively
> anyway...
> 

That's what I was looking for, thanks. :)


> > @@ -980,7 +982,7 @@ unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
> >  	/* Lock image */
> >  	spin_lock(&(image->lock));
> >  
> > -	pci_addr = (u32)image->kern_base + offset;
> > +	pci_addr = (u32)(unsigned long)image->kern_base + offset;
> 
> No, do not hide bugs here. I see no reason why address returned from
> ioremap couldn't be larger than 32 bits. Actually it is always on 64bit.
> 
> Actually what this code tries to do? Shouldn't it be physical address of
> the PCI resource instead?
> 
> regards,

Sounds reasonable.


-- 
Regards,
Namhyung Kim


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