linux-kernel - Re: [PATCH] usb/mcs7830: Don't use buffers from stack for USB transfers

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Message-Id: <20090120.153914.208764614.davem@davemloft.net>
Date:	Tue, 20 Jan 2009 15:39:14 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	arnd@...db.de
Cc:	ceggers@....de, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] usb/mcs7830: Don't use buffers from stack for USB
 transfers

From: Arnd Bergmann <arnd@...db.de>
Date: Wed, 21 Jan 2009 00:37:51 +0100

> On a related topic, can we put something in place that can check for
> this error at run-time, like a WARN_ON(is_kernel_stack(addr)) in
> dma_map_single?

That would be something for the DMA API debugging patches that
have been floating around lately.
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