From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sun, 6 Sep 2009 16:50:29 +0000 (+0200)
Subject: firewire: core: fix race with parallel PCI device probe
X-Git-Tag: v2.6.32-rc1~169^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b171e204b32b69e241af994d6e9be559e33535c1;p=pandora-kernel.git

firewire: core: fix race with parallel PCI device probe

The config ROM buffer received from generate_config_rom is a globally
shared static buffer.  Extend the card_mutex protection in fw_add_card
until after the config ROM was copied into the card driver's buffer.
Otherwise, parallelized card driver probes may end up with ROM contents
that were meant for a different card.

firewire-ohci's card->driver->enable hook is safe to be called within
the card_mutex.  Furthermore, it is safe to reorder card_list update
versus card enable, which simplifies the code a little.

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