linux-kernel - Re: [PATCH 4/5] staging: ft1000: Fix coding style in write_blk

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Date:	Tue, 8 Feb 2011 14:40:49 +0100
From:	Belisko Marek <marek.belisko@...il.com>
To:	Dan Carpenter <error27@...il.com>,
	Marek Belisko <marek.belisko@...n-nandra.com>, gregkh@...e.de,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] staging: ft1000: Fix coding style in write_blk_fifo() function.

On Wed, Jan 26, 2011 at 3:30 PM, Dan Carpenter <error27@...il.com> wrote:
> Also when it does:
>        memcpy(ft1000dev->tx_buf, *pUcFile, byte_length);
>
> That should probably be:
>        memcpy(ft1000dev->tx_buf, *pUcFile, word_length * 4);
No this shouldn't because before you have additional check:
if (byte_length && ((byte_length % 64) == 0))
        byte_length += 4;

if (byte_length < 64)
        byte_length = 68;
So in my opinion byte_length should stay.
>
> Otherwise we're probably copying garbage from beyond the end of *pUcFile
> to the ->tx_buf.  ft1000dev->tx_buf is hopefully initialized to zero at
> this point?
Yes usb_init_urb set it to zeroes.
>
> regards,
> dan carpenter
>
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thanks,

marek

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