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[Qemu-block] fix incorrect identify implementation in nvme


From: Christoph Hellwig
Subject: [Qemu-block] fix incorrect identify implementation in nvme
Date: Thu, 4 Aug 2016 21:42:13 +0200

Third resent of this series after this didn't get picked up the
previous times.  The Qemu NVMe implementation mistakes the cns
field in the Identify command as a boolean.  This was never
true, and is actively harmful since NVMe1.1 (which the Qemu
device claims to support) supports more than two Identify variants.

We had to add a quirk in Linux to work around this behavior.




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