From: Santosh Nayak <santoshprasadnayak@gmail.com>
Date: Sun, 26 Feb 2012 13:33:30 +0000 (+0530)
Subject: [SCSI] pm8001: Fix bogus interrupt state flag issue.
X-Git-Tag: v3.4-rc1~145^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bdaefbf580cd200ae3230b6aacd1f4f2dadb18e3;p=pandora-kernel.git

[SCSI] pm8001: Fix bogus interrupt state flag issue.

Static checker is giving following warning:
" error: calling 'spin_unlock_irqrestore()' with bogus flags"

The code flow is as shown below:
process_oq() --> process_one_iomb --> mpi_sata_completion

In 'mpi_sata_completion'
the first call for 'spin_unlock_irqrestore()' is with flags=0,
which is as good as 'spin_unlock_irq()' ( unconditional interrupt
enabling).

So for better performance 'spin_unlock_irqrestore()' can be replaced
with 'spin_unlock_irq()' and 'spin_lock_irqsave()' can be replaced by
'spin_lock_irq()'.

Signed-off-by: Santosh Nayak <santoshprasadnayak@gmail.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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