From: Dan Williams <dan.j.williams@intel.com>
Date: Sun, 11 Jan 2009 08:20:39 +0000 (-0800)
Subject: net_dma: acquire/release dma channels on ifup/ifdown
X-Git-Tag: v2.6.29-rc2~105^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=649274d993212e7c23c0cb734572c2311c200872;p=pandora-kernel.git

net_dma: acquire/release dma channels on ifup/ifdown

The recent dmaengine rework removed the capability to remove dma device
driver modules while net_dma is active.  Rather than notify
dmaengine-clients that channels are trying to be removed, we now rely on
clients to notify dmaengine when they no longer have a need for
channels.  Teach net_dma to release channels by taking dmaengine
references at netdevice open and dropping references at netdevice close.

Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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