From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 3 Mar 2011 16:56:07 +0000 (+0100)
Subject: [S390] tape: deadlock on system work queue
X-Git-Tag: v2.6.38-rc8~6^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c2bd9b24e73287aa4ee87844c847205e0da8a9b;p=pandora-kernel.git

[S390] tape: deadlock on system work queue

The 34xx and 3590 tape driver uses the system work queue to defer work
from the interrupt function to process context, e.g. a medium sense
after an unsolicited interrupt. The tape commands started by the work
handler need to be asynchronous, otherwise a deadlock on the system
work queue can occur.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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