linux-kernel - Re: Buffer allocation for USB transfers

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Message-Id: <200901151431.20204.oliver@neukum.org>
Date:	Thu, 15 Jan 2009 14:31:19 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	"Christian Eggers" <ceggers@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Buffer allocation for USB transfers

Am Wednesday 14 January 2009 19:58:44 schrieb Christian Eggers:
> For some reason the second example (kmalloc()) doesn't seem to cause problems (on 
> my platform) but is there are guarantee that kmalloc() 
> without GFP_DMA does always return a DMA capable buffer?

We depend on memory returned for GFP_KERNEL capable of DMA on PCI.
GFP_DMA is for ISA dma.

	Regards
		Oliver

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