From: Bjørn Mork <bjorn@mork.no>
Date: Mon, 16 Jan 2012 14:12:00 +0000 (+0100)
Subject: USB: cdc-wdm: no need to use usb_alloc_coherent
X-Git-Tag: v3.4-rc1~184^2~22^2~121^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8457d99cab81e91724b43363f7fccd851d766187;p=pandora-kernel.git

USB: cdc-wdm: no need to use usb_alloc_coherent

As Documentation/usb/dma.txt states:

  Most drivers should *NOT* be using these primitives; they don't need
  to use this type of memory (dma-coherent), and memory returned from
  kmalloc() will work just fine.

This driver handle only very low bandwith transfers.  It is not an
obvious candidate for usb_alloc_coherent().

Using these calls only serves to complicate the code for no gain,
as has been shown by multiple bugs related to this allocation path.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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