From: Dan Williams <dan.j.williams@intel.com>
Date: Wed, 25 Mar 2009 16:13:23 +0000 (-0700)
Subject: dmaengine: fail device registration if channel registration fails
X-Git-Tag: v2.6.30-rc1~225^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=257b17ca030387cb17314cd1851507bdd1b4ddd5;p=pandora-kernel.git

dmaengine: fail device registration if channel registration fails

Atsushi points out:
"If alloc_percpu or kzalloc failed, chan_id does not match with its
position in device->channels list.

And above "continue" looks buggy anyway.  Keeping incomplete channels
in device->channels list looks very dangerous..."

Also, fix up leakage of idr_ref in the idr_pre_get() and channel init
fail cases.

Reported-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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