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ARM: mvebu: completely disable hardware I/O coherency

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commit 8f1e8ee286 upstream.

The current hardware I/O coherency is known to cause problems with DMA
coherent buffers, as it still requires explicit I/O synchronization
barriers, which is not compatible with the semantics expected by the
Linux DMA coherent buffers API.

So, in order to have enough time to validate a new solution based on
automatic I/O synchronization barriers, this commit disables hardware
I/O coherency entirely. Future patches will re-enable it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
This commit is contained in:
Thomas Petazzoni 2015-01-16 17:11:27 +01:00 • committed by Luis Henriques
commit 3601b1ffdd
1 changed files with 6 additions and 1 deletions
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