From: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Date: Fri, 13 Jan 2012 02:29:59 +0000 (-0500)
Subject: IB/qib: Roll back PCIe tuning change
X-Git-Tag: v3.3-rc3~40^2^6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6bfefb0410dc49853bccd9673ead896d317c082;p=pandora-kernel.git

IB/qib: Roll back PCIe tuning change

Commit 8d4548f2b ("IB/qib: Default some module parameters optimally")
introduced an issue with older root complexes.  They cannot handle the
pcie_caps of 0x51 (MaxReadReq 4096, MaxPayload=256).

A typical diagnostic in this situation reported by syslog contains
the text:

  [PCIe Poisoned TLP][Send DMA memory read]

Restore the module paramter default to zero with will avoid any
changes in the root complex.

Reviewed-by: Mark Debbage <mark.debbage@qlogic.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
---

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