tg3: 5701 DMA corruption fix

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Herbert Xu's commit fb93134dfc, entitled
"[TCP]: Fix size calculation in sk_stream_alloc_pskb", has triggered a
bug in the 5701 where the 5701 DMA engine will corrupt outgoing
packets.  This problem only happens when the starting address of the
packet matches a certain range of offsets and only when the 5701 is
placed downstream of a particular Intel bridge.

This patch detects the problematic bridge and if present, readjusts the
starting address of the packet data to a dword aligned boundary.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Matt Carlson 2008-04-19 18:12:33 -07:00 • committed by David S. Miller

parent 36ef408061

commit 41588ba1ae

2 changed files with 49 additions and 4 deletions

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52

drivers/net/tg3.c

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1

drivers/net/tg3.h

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