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Matthew Iselin authored Mar 19, 2011 and Kevin Wolf committed Mar 26, 2011

This patch fixes the e1000 driver in VMware (and potentially some real
hardware as well) by enforcing a 16-byte alignment for transmit and
receive descriptors. Without this fix, the card automatically aligns the
addresses on a 16-byte boundary, causing corruption in several data
structures.

The specification specifically states "The * Descriptor Base Address must
point to a 16-byte aligned block of data". VMware appears to be far more
pedantic than QEMU and VirtualBox when using these buffers.
Signed-off-by: Matthew Iselin <matthew@theiselins.net>
Signed-off-by: Kevin Wolf <kevin@tyndur.org>