diff options
| author |   Sagi Grimberg <sagi@grimberg.me> | 2020-07-30 13:25:34 -0700 |
|---|---|---|
| committer | Sagi Grimberg <sagi@grimberg.me> | 2020-08-28 16:43:57 -0700 |
| commit | e5c01f4f7f623e768e868bcc08d8e7ceb03b75d0 (patch) | |
| tree | bec530ce77677ccacdb9d2ac6fae7942ab25ebbc /drivers/nvme | |
| parent | nvme-tcp: fix timeout handler (diff) | |
| download | wireguard-linux-e5c01f4f7f623e768e868bcc08d8e7ceb03b75d0.tar.xz wireguard-linux-e5c01f4f7f623e768e868bcc08d8e7ceb03b75d0.zip | |
nvme-tcp: fix reset hang if controller died in the middle of a reset
If the controller becomes unresponsive in the middle of a reset, we will
hang because we are waiting for the freeze to complete, but that cannot
happen since we have commands that are inflight holding the
q_usage_counter, and we can't blindly fail requests that times out.
So give a timeout and if we cannot wait for queue freeze before
unfreezing, fail and have the error handling take care how to proceed
(either schedule a reconnect of remove the controller).
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/tcp.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index dbb661b899ef..873d6afcbc9e 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1783,7 +1783,15 @@ static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) if (!new) { nvme_start_queues(ctrl); - nvme_wait_freeze(ctrl); + if (!nvme_wait_freeze_timeout(ctrl, NVME_IO_TIMEOUT)) { + /* + * If we timed out waiting for freeze we are likely to + * be stuck. Fail the controller initialization just + * to be safe. + */ + ret = -ENODEV; + goto out_wait_freeze_timed_out; + } blk_mq_update_nr_hw_queues(ctrl->tagset, ctrl->queue_count - 1); nvme_unfreeze(ctrl); @@ -1791,6 +1799,9 @@ static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new) return 0; +out_wait_freeze_timed_out: + nvme_stop_queues(ctrl); + nvme_tcp_stop_io_queues(ctrl); out_cleanup_connect_q: if (new) blk_cleanup_queue(ctrl->connect_q); |