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From: Duncan Sands <duncan.sands@math.u-psud.fr>
To: Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH] Avoid to use kmalloc in usb/core/message.c
Date: Tue, 5 Jul 2005 15:00:03 +0200
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Cc: Masatake YAMATO <jet@gyve.org>, linux-usb-devel@lists.sourceforge.net,
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> > > I wonder why the invocations of kmalloc are needed in these functions.
> > 
> > Because some architectures can't do DMA to/from the stack.
> 
> doing dma to/from kmalloc also isn't too nice... should be using
> dma_alloc_*() API I guess

The USB core applies dma_map_single to the buffer, so its OK.

Ciao,

Duncan.