From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Wed, 22 Jun 2011 19:05:08 +0000 (+0200)
Subject: firewire: ohci: fix PHY reg access after card ejection
X-Git-Tag: v3.1-rc1~315^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=215fa444c2a6d571f1f915cf3dc7a8b01cc51a0a;p=pandora-kernel.git

firewire: ohci: fix PHY reg access after card ejection

Detect and handle ejection of FireWire CardBus cards in PHY register
accesses:

  - The last attempt of firewire-core to reset the bus during shutdown
    caused a spurious "firewire_ohci: failed to write phy reg" error
    message in the log.  Skip this message as well as the prior retry
    loop that needlessly took 100 milliseconds.

  - In the unlikely case that a PHY register was read right after card
    ejection, a bogus value was obtained and possibly acted upon.
    Instead, fail the read attempt.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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