tree 0574a664c6cf76b7b9b0c0b795f0c6b8d2351391
parent ec497b32c311b1e1aac22a76d294d24285d06331
author Sonic Zhang <sonic.zhang@analog.com> 1273469948 +0000
committer David S. Miller <davem@davemloft.net> 1274142058 -0700

netdev: bfin_mac: invalid data cache only once for each new rx skb buffer

The skb buffer isn't actually used until we finish transferring and pass
it up to higher layers, so only invalidate the range once before we start
receiving actual data.  This also avoids the problem with data invalidating
on Blackfin systems -- there is no invalidate-only, just invalidate+flush.
So when running in writeback mode, there is the small (but not uncommon)
possibility of the flush overwriting valid DMA-ed data from the cache.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>