From: Shmulik Ravid <shmulikr@broadcom.com>
Date: Thu, 3 Dec 2009 20:27:51 +0000 (+0200)
Subject: PCI: read-modify-write the pcie device control register when initiating pcie flr
X-Git-Tag: v2.6.33-rc1~321^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04b55c4732780381410e52db0e9bfb7661f2b4b3;p=pandora-kernel.git

PCI: read-modify-write the pcie device control register when initiating pcie flr

The pcie_flr routine writes the device control register with the FLR bit
set clearing all other fields for the FLR duration. Among other fields,
the Max_Payload_Size is also cleared which can cause errors if there are
transactions lurking in the HW pipeline. The patch replaces the blank
write with read-modify-write of the control register keeping the other
fields intact.

Signed-off-by: Shmulik Ravid <shmulikr@broadcom.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---

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