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

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Date:	Wed, 26 Jan 2011 16:07:18 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Marek Belisko <marek.belisko@...n-nandra.com>
Cc:	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.

You didn't introduce it but do you know what the code is trying to do
here?

        byte_length = word_length * 4;

        if (byte_length % 4)
                aligncnt = 4 - (byte_length % 4);
        else
                aligncnt = 0;
        byte_length += aligncnt;

        if (byte_length && ((byte_length % 64) == 0))
                byte_length += 4;

        if (byte_length < 64)
                byte_length = 68;


Apparently the stuff has to be aligned to 4 bytes, but it can't be
aligned at 64 bytes and it can't be less than 68 bytes long.  The 
part that especially confuses me is why it can't be aligned at 64 bytes.

regards,
dan carpenter
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