Jay Cliburn wrote:
atl1: disable broken 64-bit DMA
[ Upstream commit: 5f08e46b621a769e52a9545a23ab1d5fb2aec1d4 ]
The L1 network chip can DMA to 64-bit addresses, but multiple descriptor
rings share a single register for the high 32 bits of their address, so
only a single, aligned, 4 GB physical address range can be used at a time.
As a result, we need to confine the driver to a 32-bit DMA mask, otherwise
we see occasional data corruption errors in systems containing 4 or more
gigabytes of RAM.
Signed-off-by: Jay Cliburn <[email protected]>
Cc: Luca Tettamanti <[email protected]>
Cc: Chris Snook <[email protected]>
Acked-By: Chris Snook <[email protected]>
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