From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Thu, 25 Sep 2008 21:16:22 +0000 (+0100)
Subject: [ARM] dma: fix dmabounce dma_sync_xxx() implementations
X-Git-Tag: v2.6.28-rc1~293^2~9^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=125ab12acf64ff86b55d20e14db20becd917b7c4;p=pandora-kernel.git

[ARM] dma: fix dmabounce dma_sync_xxx() implementations

The dmabounce dma_sync_xxx() implementation have been broken for
quite some time; they all copy data between the DMA buffer and
the CPU visible buffer no irrespective of the change of ownership.
(IOW, a DMA_FROM_DEVICE mapping copies data from the DMA buffer
to the CPU buffer during a call to dma_sync_single_for_device().)

Fix it by getting rid of sync_single(), moving the contents into
the recently created dmabounce_sync_for_xxx() functions and adjusting
appropriately.

This also makes it possible to properly support the DMA range sync
functions.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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