From: Sumant Patro <sumant.patro@lsi.com>
Date: Thu, 17 May 2007 12:47:51 +0000 (-0700)
Subject: [SCSI] megaraid_sas: intercept cmd timeout and throttle io
X-Git-Tag: v2.6.22-rc4~100^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=05e9ebbefb379a4da782b21b8427c88ac28a2334;p=pandora-kernel.git

[SCSI] megaraid_sas: intercept cmd timeout and throttle io

eh_timed_out call back (megasas_reset_timer) is used to throttle io
to the adapter when it is called the first time for a scmd.
The MEGASAS_FW_BUSY flag is set and can_queue reduced to 16.
The can_queue is restored from completion routine in following
two conditions : 5 seconds has elapsed and
the # of outstanding cmds in FW is < 17.

Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

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