net: calxedaxgmac: update ring buffer tx_head after barriers

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Ensure that the descriptor writes are visible before the ring buffer head
is updated. Since writel is a barrier, we can simply update the head after
the writel.

Reported-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Rob Herring 2013-08-30 16:49:23 -05:00 • committed by David S. Miller

parent 1a1d4d2f30

commit ca32723afe

1 changed files with 2 additions and 1 deletions

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drivers/net/ethernet/calxeda/xgmac.c

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