From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sat, 12 Jul 2008 12:50:06 +0000 (+0200)
Subject: firewire: fully initialize fw_transaction before marking it pending
X-Git-Tag: v2.6.27-rc1~54^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9aeb46c93a8b1b703d00586c05d9a71aa7e0f0c;p=pandora-kernel.git

firewire: fully initialize fw_transaction before marking it pending

In theory, card->flush_timer could already access a transaction between
fw_send_request()'s spin_unlock_irqrestore and the rest of what happens
in fw_send_request().  This would happen if the process which sends the
request is preempted and put to sleep right after spin_unlock_irqrestore
for longer than 100ms.

Therefore we fill in everything in struct fw_transaction at which the
flush_timer might look at before we lift the lock.

To do:  Ensure that the timer does not pick up the transaction before
the time of the AT request event plus split transaction timeout.

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