linux-kernel - Re: [PATCH 1/3] mfd: Add realtek USB card reader driver

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Message-ID: <20140114135551.GN7444@mwanda>
Date:	Tue, 14 Jan 2014 16:55:51 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>, Alex Dubov <oakad@...oo.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	driverdev-devel@...uxdriverproject.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, wei_wang@...lsil.com.cn,
	rogerable@...ltek.com, Chris Ball <cjb@...top.org>,
	Maxim Levitsky <maximlevitsky@...il.com>
Subject: Re: [PATCH 1/3] mfd: Add realtek USB card reader driver

On Tue, Jan 14, 2014 at 04:46:34PM +0300, Dan Carpenter wrote:
> [ Sorry, I am coming down with the flu today so I'm doing dorky things
>   like reviewing review comments.  I'm not sure how coherent I am.  ]
> 
> On Tue, Jan 14, 2014 at 01:04:09PM +0000, Lee Jones wrote:
>  
> > > +static void rtsx_usb_sg_timed_out(unsigned long data)
> > > +{
> > > +	struct rtsx_ucr *ucr = (struct rtsx_ucr *)data;
> > 
> > What's going to happen when your device runs 64bit?
> > 
> 
> I'm not sure I understand what you mean here.  On linux sizeof(long) is
> always the same as sizeof(void *).
> 
> 
> > > +	if (cmd_len > IOBUF_SIZE)
> > > +		return -EINVAL;
> > > +
> > > +	if (cmd_len % 4)
> > > +		cmd_len += (4 - cmd_len % 4);
> > 
> > Please document in a comment.
> 
> There is a kernel macro for this:
> 
> 	cmd_len = ALIGN(cmd_len, 4);
> 

Btw, what's the difference between ALIGN(cmd_len, 4) and
round_up(cmd_len, 4)?  Maybe round_up() is better.

regards,
dan carpenter
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