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Date: Tue, 18 Sep 2012 15:34:14 +0200
From: Joerg Roedel <joerg.roedel@amd.com>
To: Shuah Khan <shuah.khan@hp.com>
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Greg KH <greg@kroah.com>,
        <tglx@linutronix.de>, <mingo@redhat.com>, <hpa@zytor.com>,
        <rob@landley.net>, <akpm@linux-foundation.org>, <bhelgaas@google.com>,
        <stern@rowland.harvard.edu>, LKML <linux-kernel@vger.kernel.org>,
        <linux-doc@vger.kernel.org>, <devel@linuxdriverproject.org>,
        <x86@kernel.org>, <shuahkhan@gmail.com>
Subject: Re: [PATCH] dma-debug: New interfaces to debug dma mapping errors
Message-ID: <20120918133414.GM2505@amd.com>
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On Mon, Sep 17, 2012 at 04:45:15PM -0600, Shuah Khan wrote:
> Yeah. I will firm up my ideas a bit and summarize in a day or two. Would
> like to hear your ideas as well at that time, so we can pick the one
> that works the best.

I think the best approach for this functionality is to add a flag to
'struct dma_debug_entry' which tells whether the address has been
checked with dma_mapping error or not. On unmap or driver unload you can
then check for that flag and print a warning when an unchecked address
is detected.


	Joerg

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