From: Ilya Yanok <yanok@emcraft.com>
Date: Tue, 26 Oct 2010 23:52:58 +0000 (+0200)
Subject: powerpc/512x: try to free dma descriptors in case of allocation failure
X-Git-Tag: v2.6.38-rc1~405^2~2^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a276991357c63bfb8d3ffdf5800054dba4f8d558;p=pandora-kernel.git

powerpc/512x: try to free dma descriptors in case of allocation failure

Currently completed descriptors are processed in the tasklet. This can
lead to dead lock in case of CONFIG_NET_DMA enabled (new requests are
submitted from softirq context and dma_memcpy_to_iovec() busy loops until
the requests is submitted). To prevent this we should process completed
descriptors from the allocation failure path in prepare_memcpy too.

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Cc: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

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