tree b7dd47b2e399555d43abffbc75307c3981f85343
parent efe82a16bc0f9f9e1fc8fa706eb0309fcd57770a
author Kashyap, Desai <kashyap.desai@lsi.com> 1294121097 +0530
committer James Bottomley <James.Bottomley@suse.de> 1295882544 -0600

[SCSI] mpt2sas: Correct resizing calculation for max_queue_depth

The ioc->hba_queue_depth is not properly resized when the controller
firmware reports that it supports more outstanding IO than what can be fit
inside the reply descriptor pool depth. This is reproduced by setting the
controller global credits larger than 30,000. The bug results in an
incorrect sizing of the queues. The fix is to resize the queue_size by
dividing queue_diff by two.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>