From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Mon, 3 Mar 2014 22:22:35 +0000 (+0100)
Subject: firewire: sbp2: protect a reference counter properly
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~71^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0765cbd3be699b4a72db67069247d514f06a1e4f;p=pandora-kernel.git

firewire: sbp2: protect a reference counter properly

The assertion in the comment in sbp2_allow_block() is no longer true.
Or maybe it never was true.  At least now, the sole caller of
sbp2_allow_block(), sbp2_login, can run concurrently to one of
sbp2_unblock()'s callers, sbp2_remove.

sbp2_login is performed by sbp2_logical_unit.work.
sbp2_remove is performed by fw_device.work.
sbp2_remove cancels sbp2_logical_unit.work, but only after it called
sbp2_unblock.

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

Reading git-diff-tree failed