From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sat, 24 May 2008 14:50:22 +0000 (+0200)
Subject: firewire: clean up fw_card reference counting
X-Git-Tag: v2.6.27-rc1~1074^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=459f79235d8faa0050180c7e0c7bb4b2b52cbdfd;p=pandora-kernel.git

firewire: clean up fw_card reference counting

This is a functionally equivalent replacement of the current reference
counting of struct fw_card instances.  It only converts it to common
idioms as suggested by Kristian Høgsberg:
  - struct kref replaces atomic_t as the counter.
  - wait_for_completion is used to wait for all card users to complete.

BTW, it may make sense to count card->flush_timer and card->work as
card users too.

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