tree 5730241c737baf67b0b1ddf89ff38f6936d649c4
parent 510847750c9d26052a71631e0fcad9e7f7a5f369
author Bryan O'Sullivan <bos@pathscale.com> 1159459218 -0700
committer Roland Dreier <rolandd@cisco.com> 1159467423 -0700

IB/ipath: Fix and recover TXE piobuf and PBC parity errors

We can sometimes trigger parity errors due to processor speculative
reads to our write-combined memory (mostly seen on Woodcrest).   Add a
stats counter for these.

Factored out the sendbuffererror buffer cancellation code so it can be
used in the new handling; suppress likely subsequent error messages if
within two jiffies of the cancellation.

Also restore 2 dropped TXE lines on hwe_bitsextant noticed while
debugging.

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>