linux-kernel - Re: [PATCH 1/2 v4] Driver for Freescale 8610 and 5121 DIU

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Message-Id: <1206728329.10785.12.camel@laptop>
Date:	Fri, 28 Mar 2008 13:18:49 -0500
From:	York Sun <yorksun@...escale.com>
To:	avorontsov@...mvista.com
Cc:	Scott Wood <scottwood@...escale.com>,
	linux-fbdev-devel@...ts.sourceforge.net, a.p.zijlstra@...llo.nl,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	akpm@...ux-foundation.org, Timur Tabi <timur@...escale.com>
Subject: Re: [PATCH 1/2 v4] Driver for Freescale 8610 and 5121 DIU

On Fri, 2008-03-28 at 20:48 +0300, Anton Vorontsov wrote:
> > >+		if (copy_from_user(&pix_fmt, (void __user *)arg,
> > >+				sizeof(pix_fmt)))
> > 
> > OK, you fixed the cast here...
> 
> Maybe better would be to define "buf" at the top of this function as
> void __user *buf = (void __user *)arg;, i.e. just once?

I think it is a good idea.

> 
> > 
> > >+			return -EFAULT;
> > >+		ad->pix_fmt = pix_fmt;
> > >+		pr_debug("Set pixel format to 0x%08x\n", ad->pix_fmt);
> > >+		break;
> > >+	case MFB_GET_PIXFMT:
> > >+		if (!arg)
> > >+			return -EINVAL;
> 
> This if (!arg) appears to be everywhere except default: label, maybe
> this could be placed on top too?
Will do that, too.

York

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