From: Duncan Sands <duncan.sands@math.u-psud.fr>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Masatake YAMATO <jet@gyve.org>,
linux-usb-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Avoid to use kmalloc in usb/core/message.c
Date: Tue, 5 Jul 2005 15:00:03 +0200 [thread overview]
Message-ID: <200507051500.03748.duncan.sands@math.u-psud.fr> (raw)
In-Reply-To: <1120562571.3180.36.camel@laptopd505.fenrus.org>
> > > 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.
prev parent reply other threads:[~2005-07-05 13:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-05 10:12 Masatake YAMATO
2005-07-05 10:36 ` Duncan Sands
2005-07-05 11:22 ` Arjan van de Ven
2005-07-05 13:00 ` Duncan Sands [this message]
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