When rtl_recv() of rtl8169 is called, OWNbit of status register
is not enable occasionally.
rtl_recv() doesn't work normally when the driver doesn't do
appropriate processing.
This patch fix this problem.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Signed-off-by: Stelian Pop <stelian <at> popies.net>
Acked-by: Haavard Skinnemoen <hskinnemoen <at> atmel.com>

update comments
Fix coding style

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off by: John Rigby <jrigby@freescale.com>

rx_status on the memory is basically in LE, but needs to be handled in CPU
endian. le32_to_cpu() takes up this mission. Even if on the sane hardware,
it'll work fine.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Cc: Masami Komiya <mkomiya@sonare.it>
Cc: Lucas Jin <lucasjin@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

Current driver is meant for cache coherent systems. This patch adds
flush_cache() routines to support cache non-coherent systems.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Cc: Masami Komiya <mkomiya@sonare.it>
Cc: Lucas Jin <lucasjin@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

"to = (currticks() + RTL_TIMEOUT)" has possibilities to wrap around. If it
does, the condition "(currticks() < to)" becomes invalid and immediately
leads to tx timeout error. This patch introduces the fine-graded udely(10)
loops to ease the impact of wrapping around.

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Cc: Masami Komiya <mkomiya@sonare.it>
Cc: Lucas Jin <lucasjin@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>