From: Venkatesh Srinivas <venkateshs@google.com>
Date: Sun, 6 Jul 2014 14:39:27 +0000 (+0200)
Subject: virtio-scsi: Implement change_queue_depth for virtscsi targets
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~143^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=761f1193f299873236dbc21277864d70cb7ba8a3;p=pandora-kernel.git

virtio-scsi: Implement change_queue_depth for virtscsi targets

change_queue_depth allows changing per-target queue depth via sysfs.

It also allows the SCSI midlayer to ramp down the number of concurrent
inflight requests in response to a SCSI BUSY status response and allows
the midlayer to ramp the count back up to the device maximum when the
BUSY condition has resolved.

Signed-off-by: Venkatesh Srinivas <venkateshs@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

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