From: Sumit.Saxena@avagotech.com <Sumit.Saxena@avagotech.com>
Date: Mon, 5 Jan 2015 14:36:23 +0000 (+0530)
Subject: megaraid_sas: reserve commands for IOCTLs and internal DCMDs
X-Git-Tag: fixes-v4.0-rc1~143^2~77
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae09a6c1fd421887fa4885adb7c55ccc8074c441;p=pandora-kernel.git

megaraid_sas: reserve commands for IOCTLs and internal DCMDs

1) For fusion adapters, limit reserved frames for non SCSI commands to 8
   (3 for parallel IOCTLs + 5 for driver's internal DCMDs).
   Earlier reserved commands for non SCSI IO frames was set to 32, so with
   this implementation, increased per controller "can_queue".
   Behavior of MFI controllers will remain unchanged.

2) Optimize the code related to per controller's 'can_queue' setting.

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Chaitra Basappa <chaitra.basappa@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---

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