net: dwc_eth_qos: Invalidate RX descriptor before reading

The current code polls the RX desciptor ring for new packets by reading
the RX descriptor status. This works by accident, as the RX descriptors
are often in non-cacheable memory. However, the driver does support use
of RX descriptors in cacheable memory.

This patch adds a missing RX descriptor invalidation, which assures the
CPU will read a fresh copy of the RX descriptor instead of a cached one.

Reviewed-by: Patrick Delaunay <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
Cc: Joe Hershberger <[email protected]>
Cc: Patrice Chotard <[email protected]>
Cc: Patrick Delaunay <[email protected]>
Cc: Ramon Fried <[email protected]>
Cc: Stephen Warren <[email protected]>

0 files changed, 0 insertions, 0 deletions