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| author | Jianchao Wang <jianchao.w.wang@oracle.com> | 2018-02-12 15:54:45 +0300 |
|---|---|---|
| committer | Keith Busch <keith.busch@intel.com> | 2018-02-14 03:09:50 +0300 |
| commit | 3fd176b754e992e1cdf1693ea8184626d1ed7671 (patch) | |
| tree | 6922ddd6c61233e01bbbe4b5be27f7dd065cb1fe /drivers | |
| parent | 0a34e4668c508cbbc2d5ef2d9710b145e4c0b27d (diff) | |
| download | linux-3fd176b754e992e1cdf1693ea8184626d1ed7671.tar.xz | |
nvme: fix the deadlock in nvme_update_formats
nvme_update_formats will invoke nvme_ns_remove under namespaces_mutext.
The will cause deadlock because nvme_ns_remove will also require
the namespaces_mutext. Fix it by getting the ns entries which should
be removed under namespaces_mutext and invoke nvme_ns_remove out of
namespaces_mutext.
Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/core.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 6d0490b477c9..52b3626fb64e 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1117,14 +1117,19 @@ static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns, static void nvme_update_formats(struct nvme_ctrl *ctrl) { - struct nvme_ns *ns; + struct nvme_ns *ns, *next; + LIST_HEAD(rm_list); mutex_lock(&ctrl->namespaces_mutex); list_for_each_entry(ns, &ctrl->namespaces, list) { - if (ns->disk && nvme_revalidate_disk(ns->disk)) - nvme_ns_remove(ns); + if (ns->disk && nvme_revalidate_disk(ns->disk)) { + list_move_tail(&ns->list, &rm_list); + } } mutex_unlock(&ctrl->namespaces_mutex); + + list_for_each_entry_safe(ns, next, &rm_list, list) + nvme_ns_remove(ns); } static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects) |