From: Guenter Roeck <linux@roeck-us.net>
To: Daniel Wagner <wagi@kernel.org>
Cc: Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
James Smart <james.smart@broadcom.com>,
Hannes Reinecke <hare@suse.de>,
Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] nvme: only allow entering LIVE from CONNECTING state
Date: Sun, 27 Apr 2025 08:59:13 -0700 [thread overview]
Message-ID: <0134ea15-8d5f-41f7-9e9a-d7e6d82accaa@roeck-us.net> (raw)
In-Reply-To: <20250214-nvme-fc-fixes-v1-1-7a05d557d5cc@kernel.org>
Hi,
On Fri, Feb 14, 2025 at 09:02:03AM +0100, Daniel Wagner wrote:
> The fabric transports and also the PCI transport are not entering the
> LIVE state from NEW or RESETTING. This makes the state machine more
> restrictive and allows to catch not supported state transitions, e.g.
> directly switching from RESETTING to LIVE.
>
> Signed-off-by: Daniel Wagner <wagi@kernel.org>
nvme_handle_aen_notice(), when handling NVME_AER_NOTICE_FW_ACT_STARTING,
sets the state to RESETTING and and triggers a worker. This worker
waits for firmware activation to complete and then tries to set the
state back to LIVE. This step now fails.
Possibly the handling of NVME_AER_NOTICE_FW_ACT_STARTING needs to be
improved. However, leaving the NVME in RESETTING state after an
NVME_AER_NOTICE_FW_ACT_STARTING event is worse.
I think this patch should be reverted at least for the time being until
the handling of NVME_AER_NOTICE_FW_ACT_STARTING no longer relies on a
direct state change from RESETTING to LIVE.
Please correct me if my analysis is wrong.
Thanks,
Guenter
> ---
> drivers/nvme/host/core.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 818d4e49aab51c388af9a48bf9d466fea9cef51b..f028913e2e622ee348e88879c6e6b7e8f8a1cc82 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -564,8 +564,6 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
> switch (new_state) {
> case NVME_CTRL_LIVE:
> switch (old_state) {
> - case NVME_CTRL_NEW:
> - case NVME_CTRL_RESETTING:
> case NVME_CTRL_CONNECTING:
> changed = true;
> fallthrough;
>
> --
> 2.48.1
>
next prev parent reply other threads:[~2025-04-27 15:59 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-14 8:02 [PATCH 0/2] nvme-fc: fix schedule in atomic context Daniel Wagner
2025-02-14 8:02 ` [PATCH 1/2] nvme: only allow entering LIVE from CONNECTING state Daniel Wagner
2025-02-20 10:34 ` Sagi Grimberg
2025-04-27 15:59 ` Guenter Roeck [this message]
2025-04-28 12:44 ` Daniel Wagner
2025-04-28 13:21 ` Hannes Reinecke
2025-04-29 13:55 ` Daniel Wagner
2025-04-29 17:54 ` Hannes Reinecke
2025-04-29 18:13 ` Keith Busch
2025-04-29 18:23 ` Guenter Roeck
2025-04-29 18:42 ` Keith Busch
2025-04-30 6:43 ` Daniel Wagner
2025-04-30 16:01 ` Keith Busch
2025-04-30 16:12 ` Guenter Roeck
2025-05-02 9:02 ` Daniel Wagner
2025-04-30 16:11 ` Guenter Roeck
2025-04-30 6:08 ` Hannes Reinecke
2026-01-09 19:18 ` John Meneghini
2026-01-11 9:33 ` Nilay Shroff
2026-01-12 8:14 ` Daniel Wagner
2026-01-13 6:10 ` Nilay Shroff
2026-01-13 13:55 ` John Meneghini
2025-02-14 8:02 ` [PATCH 2/2] nvme-fc: rely on state transitions to handle connectivity loss Daniel Wagner
2025-02-20 10:36 ` Sagi Grimberg
2025-02-20 8:00 ` [PATCH 0/2] nvme-fc: fix schedule in atomic context Daniel Wagner
2025-02-20 12:50 ` Shinichiro Kawasaki
2025-02-20 17:23 ` Keith Busch
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