From: Sagi Grimberg <sagi@grimberg.me>
To: Logan Gunthorpe <logang@deltatee.com>,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
Stephen Bates <sbates@raithlin.com>, Jens Axboe <axboe@fb.com>,
Keith Busch <kbusch@kernel.org>, Max Gurtovoy <maxg@mellanox.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v11 8/9] nvmet-passthru: Add enable/disable helpers
Date: Wed, 26 Feb 2020 15:33:56 -0800 [thread overview]
Message-ID: <96234649-fbc1-fb56-54d8-2f73dc455ffd@grimberg.me> (raw)
In-Reply-To: <20200220203652.26734-9-logang@deltatee.com>
> + if (subsys->ver < NVME_VS(1, 2, 1)) {
> + pr_warn("nvme controller version is too old: %d.%d.%d, advertising 1.2.1\n",
> + (int)NVME_MAJOR(subsys->ver),
> + (int)NVME_MINOR(subsys->ver),
> + (int)NVME_TERTIARY(subsys->ver));
> + subsys->ver = NVME_VS(1, 2, 1);
Umm.. is this OK? do we implement the mandatory 1.2.1 features on behalf
of the passthru device?
> + }
> +
> + mutex_unlock(&subsys->lock);
> + return 0;
> +
> +out_put_ctrl:
> + nvme_put_ctrl(ctrl);
> +out_unlock:
> + mutex_unlock(&subsys->lock);
> + return ret;
> +}
> +
> +static void __nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
> +{
> + if (subsys->passthru_ctrl) {
> + xa_erase(&passthru_subsystems, subsys->passthru_ctrl->cntlid);
> + nvme_put_ctrl(subsys->passthru_ctrl);
> + }
> + subsys->passthru_ctrl = NULL;
> + subsys->ver = NVMET_DEFAULT_VS;
> +}
Isn't it strange that a subsystem changes its version in its lifetime?
> +
> +void nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
> +{
> + mutex_lock(&subsys->lock);
> + __nvmet_passthru_ctrl_disable(subsys);
> + mutex_unlock(&subsys->lock);
> +}
> +
> +void nvmet_passthru_subsys_free(struct nvmet_subsys *subsys)
> +{
> + mutex_lock(&subsys->lock);
> + __nvmet_passthru_ctrl_disable(subsys);
> + kfree(subsys->passthru_ctrl_path);
> + mutex_unlock(&subsys->lock);
Nit, any reason why the free is in the mutex?
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next prev parent reply other threads:[~2020-02-26 23:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 20:36 [PATCH v11 0/9] nvmet: add target passthru commands support Logan Gunthorpe
2020-02-20 20:36 ` [PATCH v11 1/9] nvme-core: Clear any SGL flags in passthru commands Logan Gunthorpe
2020-02-26 23:08 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 2/9] nvme: Create helper function to obtain command effects Logan Gunthorpe
2020-02-26 23:09 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 3/9] nvme: Move nvme_passthru_[start|end]() calls to common helper Logan Gunthorpe
2020-02-26 23:10 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 4/9] nvmet-passthru: Introduce NVMet passthru Kconfig option Logan Gunthorpe
2020-02-26 23:12 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 5/9] nvme-core: Introduce nvme_ctrl_get_by_path() Logan Gunthorpe
2020-02-20 20:36 ` [PATCH v11 6/9] nvme: Export existing nvme core functions Logan Gunthorpe
2020-02-26 23:13 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 7/9] nvmet-passthru: Add passthru code to process commands Logan Gunthorpe
2020-02-26 23:28 ` Sagi Grimberg
2020-02-27 17:33 ` Logan Gunthorpe
2020-02-20 20:36 ` [PATCH v11 8/9] nvmet-passthru: Add enable/disable helpers Logan Gunthorpe
2020-02-26 23:33 ` Sagi Grimberg [this message]
2020-02-27 17:37 ` Logan Gunthorpe
2020-02-27 23:13 ` Sagi Grimberg
2020-02-20 20:36 ` [PATCH v11 9/9] nvmet-configfs: Introduce passthru configfs interface Logan Gunthorpe
2020-02-26 23:35 ` Sagi Grimberg
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