linux-kernel - Re: [BISECTED] nvme probe failure with v5.13-rc1

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Message-ID: <20210521173125.GC29013@redsun51.ssa.fujisawa.hgst.com>
Date:   Sat, 22 May 2021 02:31:25 +0900
From:   Keith Busch <kbusch@...nel.org>
To:     "Verma, Vishal L" <vishal.l.verma@...el.com>
Cc:     "hch@....de" <hch@....de>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "Schofield, Alison" <alison.schofield@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "Weiny, Ira" <ira.weiny@...el.com>,
        "Widawsky, Ben" <ben.widawsky@...el.com>
Subject: Re: [BISECTED] nvme probe failure with v5.13-rc1

On Fri, May 21, 2021 at 04:50:15PM +0000, Verma, Vishal L wrote:
> 
> Thanks for looking into it - yes with that the problem goes away.
> Let me chat with the simics folks and see if I can get them to fix it.

Thanks for confirming. It sounds like the simics implementation is
missing a default case in its identify function's CNS check and simply
loses track of the command. I'd wager it probably also times out for any
reserved or unsupported CNS value.