From: Christoph Hellwig <hch@lst.de>
Date: Mon, 24 Nov 2014 14:36:19 +0000 (+0100)
Subject: scsi: never drop to untagged mode during queue ramp down
X-Git-Tag: omap-for-v3.19/fixes-rc1~11^2^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b70870c38ede2bb5b0a738f2f69de145a1931a00;p=pandora-kernel.git

scsi: never drop to untagged mode during queue ramp down

Dropping to untagged mode when ramping down a queue due to QUEUE FULL
events has two problems:

 - nothing in the midlayer or drivers ever moves back to tagged mode
   during queue ramp up.
 - cmd_per_lun isn't the untagged queue depth for many modern drivers
   that can handle multiple untagged commands, and this is the only
   place in the midlayer assuming that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
---

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