linux-kernel - Re: [PATCH v3 1/3] nvme/scsi: Remove power management support

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Date:   Fri, 16 Sep 2016 10:33:33 +0200
From:   Christoph Hellwig <hch@....de>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Keith Busch <keith.busch@...el.com>, Jens Axboe <axboe@...com>,
        linux-nvme@...ts.infradead.org, Christoph Hellwig <hch@....de>,
        linux-kernel@...r.kernel.org,
        J Freyensee <james_p_freyensee@...ux.intel.com>
Subject: Re: [PATCH v3 1/3] nvme/scsi: Remove power management support

On Thu, Sep 15, 2016 at 10:24:19PM -0700, Andy Lutomirski wrote:
> As far as I can tell, there is basically nothing correct about this
> code.  It misinterprets npss (off-by-one).  It hardcodes a bunch of
> power states, which is nonsense, because they're all just indices
> into a table that software needs to parse.  It completely ignores
> the distinction between operational and non-operational states.
> And, until 4.8, if all of the above magically succeeded, it would
> dereference a NULL pointer and OOPS.
> 
> Since this code appears to be useless, just delete it.

Yes, please!

Acked-by: Christoph Hellwig <hch@....de>