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[S390] cio: subchannel evaluation function operates without lock
authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
Wed, 20 Sep 2006 14:00:01 +0000 (16:00 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 20 Sep 2006 14:00:01 +0000 (16:00 +0200)
css_evaluate_subchannel() operates subchannel without lock which can
lead to erratic behavior caused by concurrent device access. Also
split evaluation function to make it more readable.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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