From: Dan Williams <dan.j.williams@intel.com>
Date: Tue, 6 Jan 2009 18:38:21 +0000 (-0700)
Subject: dmaengine: add a release for dma class devices and dependent infrastructure
X-Git-Tag: v2.6.29-rc1~39^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41d5e59c1299f27983977bcfe3b360600996051c;p=pandora-kernel.git

dmaengine: add a release for dma class devices and dependent infrastructure

Resolves:
WARNING: at drivers/base/core.c:122 device_release+0x4d/0x52()
Device 'dma0chan0' does not have a release() function, it is broken and must be fixed.

The dma_chan_dev object is introduced to gear-match sysfs kobject and
dmaengine channel lifetimes.  When a channel is removed access to the
sysfs entries return -ENODEV until the kobject can be released.

The bulk of the change is updates to existing code to handle the extra
layer of indirection between a dma_chan and its struct device.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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