linux-kernel - Re: [PATCH v3 3/3] nvme: handle connectivity loss in nvme_set_queue

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Message-ID: <b8dad319-8e6e-40e7-ada3-f50863315614@suse.de>
Date: Tue, 17 Dec 2024 10:45:45 +0100
From: Hannes Reinecke <hare@...e.de>
To: Daniel Wagner <dwagner@...e.de>
Cc: Daniel Wagner <wagi@...nel.org>, James Smart <james.smart@...adcom.com>,
 Keith Busch <kbusch@...nel.org>, Christoph Hellwig <hch@....de>,
 Sagi Grimberg <sagi@...mberg.me>, Paul Ely <paul.ely@...adcom.com>,
 linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] nvme: handle connectivity loss in
 nvme_set_queue_count

On 12/17/24 09:35, Daniel Wagner wrote:
> On Fri, Nov 29, 2024 at 12:10:33PM +0100, Hannes Reinecke wrote:
>>> +	/*
>>> +	 * It's either a kernel error or the host observed a connection
>>> +	 * lost. In either case it's not possible communicate with the
>>> +	 * controller and thus enter the error code path.
>>> +	 */
>>> +	if (status < 0 || status == NVME_SC_HOST_PATH_ERROR)
>>>    		return status;
>>>    	/*
>>>
>> Hmm. Maybe checking for NVME_SC_DNR, too?
> 
> if no one complains I'll update the check to:
> 
> 	if (status < 0 || (status > 0 && (status & NVME_STATUS_DNR)) ||
> 	    status == NVME_SC_HOST_PATH_ERROR)
> 		return status;
> 
> okay?

Which really cries out for a helper. But otherwise okay.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich