linux-kernel - Re: [PATCH v2] nvme: Add hardware monitoring support

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Message-ID: <20191030140511.GA14252@lst.de>
Date:   Wed, 30 Oct 2019 15:05:11 +0100
From:   Christoph Hellwig <hch@....de>
To:     Akinobu Mita <akinobu.mita@...il.com>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-nvme@...ts.infradead.org,
        Linux PM <linux-pm@...r.kernel.org>,
        Chris Healy <cphealy@...il.com>
Subject: Re: [PATCH v2] nvme: Add hardware monitoring support

On Wed, Oct 30, 2019 at 08:16:48PM +0900, Akinobu Mita wrote:
> The nvme_init_identify() can be called multiple time in nvme ctrl's
> lifetime (e.g 'nvme reset /dev/nvme*' or suspend/resume paths), so
> should we need to prevent nvme_hwmon_init() from registering hwmon
> device more than twice?
> 
> In the nvme thermal zone patchset[1], thernal zone is registered in
> nvme_init_identify and unregistered in nvme_stop_ctrl().

So Guenter said above the thermal subsystem could use the information
from hwmon as well.  Does this mean this patch would solve your needs
as well?