6.6-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Wagner wagi@kernel.org
[ Upstream commit c8ed6cb5d37bc09c7e25e49a670e9fd1a3bd1dfa ]
Do not access the state variable directly, instead use proper synchronization so not stale data is read.
Fixes: e6e7f7ac03e4 ("nvme: ensure reset state check ordering") Signed-off-by: Daniel Wagner wagi@kernel.org Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Keith Busch kbusch@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/fc.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index cdb1e706f855e..91324791a5b66 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -2080,7 +2080,8 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req) nvme_fc_complete_rq(rq);
check_error: - if (terminate_assoc && ctrl->ctrl.state != NVME_CTRL_RESETTING) + if (terminate_assoc && + nvme_ctrl_state(&ctrl->ctrl) != NVME_CTRL_RESETTING) queue_work(nvme_reset_wq, &ctrl->ioerr_work); }
@@ -2534,6 +2535,8 @@ __nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues) static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) { + enum nvme_ctrl_state state = nvme_ctrl_state(&ctrl->ctrl); + /* * if an error (io timeout, etc) while (re)connecting, the remote * port requested terminating of the association (disconnect_ls) @@ -2541,7 +2544,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) * the controller. Abort any ios on the association and let the * create_association error path resolve things. */ - if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) { + if (state == NVME_CTRL_CONNECTING) { __nvme_fc_abort_outstanding_ios(ctrl, true); set_bit(ASSOC_FAILED, &ctrl->flags); dev_warn(ctrl->ctrl.device, @@ -2551,7 +2554,7 @@ nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg) }
/* Otherwise, only proceed if in LIVE state - e.g. on first error */ - if (ctrl->ctrl.state != NVME_CTRL_LIVE) + if (state != NVME_CTRL_LIVE) return;
dev_warn(ctrl->ctrl.device,