linux-kernel - [PATCH AUTOSEL 5.4 4/4] nvme: only allow entering LIVE from CONNECTING state

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Message-Id: <20250224112115.2215137-4-sashal@kernel.org>
Date: Mon, 24 Feb 2025 06:21:12 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Daniel Wagner <wagi@...nel.org>,
	Sagi Grimberg <sagi@...mberg.me>,
	Keith Busch <kbusch@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	linux-nvme@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 4/4] nvme: only allow entering LIVE from CONNECTING state

From: Daniel Wagner <wagi@...nel.org>

[ Upstream commit d2fe192348f93fe3a0cb1e33e4aba58e646397f4 ]

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.

Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Signed-off-by: Daniel Wagner <wagi@...nel.org>
Signed-off-by: Keith Busch <kbusch@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 a841fd4929adc..1ba0c25a7c5b6 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -351,8 +351,6 @@ 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;
 			/* FALLTHRU */
-- 
2.39.5