From: Bart Van Assche <bvanassche@acm.org>
Date: Sat, 17 Aug 2013 20:34:43 +0000 (+0000)
Subject: libfc: Do not invoke the response handler after fc_exch_done()
X-Git-Tag: v3.13-rc1~99^2^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7030fd626129ec4d616784516a462d317c251d39;p=pandora-kernel.git

libfc: Do not invoke the response handler after fc_exch_done()

While the FCoE initiator driver invokes fc_exch_done() from inside
the libfc response handler, FCoE target drivers typically invoke
fc_exch_done() from outside the libfc response handler. The object
fc_exch.arg points at may disappear as soon as fc_exch_done() has
finished. So it's important not to invoke the response handler
function after fc_exch_done() has finished. Modify libfc such that
this guarantee is provided if fc_exch_done() is invoked from
outside a response handler. This patch fixes a sporadic crash in
FCoE target implementations after a command has been aborted.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
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