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| author | Nitzan Carmi | 2018-01-17 12:01:14 +0100 |
|---|---|---|
| committer | Sagi Grimberg | 2018-02-14 14:44:22 +0100 |
| commit | 8000d1fdb07e365e6565c2415aefdfed15413794 (patch) | |
| tree | bb5c280bb677d06e0558f558359dacd8360679cd | |
| parent | nvmet: Change return code of discard command if not supported (diff) | |
| download | kernel-qcow2-linux-8000d1fdb07e365e6565c2415aefdfed15413794.tar.gz kernel-qcow2-linux-8000d1fdb07e365e6565c2415aefdfed15413794.tar.xz kernel-qcow2-linux-8000d1fdb07e365e6565c2415aefdfed15413794.zip | |
nvme-rdma: fix sysfs invoked reset_ctrl error flow
When reset_controller that is invoked by sysfs fails,
it enters an error flow which practically removes the
nvme ctrl entirely (similar to delete_ctrl flow). It
causes the system to hang, since a sysfs attribute cannot
be unregistered by one of its own methods.
This can be fixed by calling delete_ctrl as a work rather
than sequential code. In addition, it should give the ctrl
a chance to recover using reconnection mechanism (consistant
with FC reset_ctrl error flow). Also, while we're here, return
suitable errno in case the reset ended with non live ctrl.
Signed-off-by: Nitzan Carmi <nitzanc@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
| -rw-r--r-- | drivers/nvme/host/core.c | 6 | ||||
| -rw-r--r-- | drivers/nvme/host/rdma.c | 7 |
2 files changed, 7 insertions, 6 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 52b3626fb64e..0fe7ea35c221 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -120,8 +120,12 @@ int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl) int ret; ret = nvme_reset_ctrl(ctrl); - if (!ret) + if (!ret) { flush_work(&ctrl->reset_work); + if (ctrl->state != NVME_CTRL_LIVE) + ret = -ENETRESET; + } + return ret; } EXPORT_SYMBOL_GPL(nvme_reset_ctrl_sync); diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 5e2cc4f0d207..3a51ed50eff2 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1784,11 +1784,8 @@ static void nvme_rdma_reset_ctrl_work(struct work_struct *work) return; out_fail: - dev_warn(ctrl->ctrl.device, "Removing after reset failure\n"); - nvme_remove_namespaces(&ctrl->ctrl); - nvme_rdma_shutdown_ctrl(ctrl, true); - nvme_uninit_ctrl(&ctrl->ctrl); - nvme_put_ctrl(&ctrl->ctrl); + ++ctrl->ctrl.nr_reconnects; + nvme_rdma_reconnect_or_remove(ctrl); } static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = { |