diff options
| author | Israel Rukshin <israelr@mellanox.com> | 2020-03-24 17:29:45 +0200 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2020-03-26 04:51:56 +0900 |
| commit | bea54ef53fce57c8b2f11315c9384e43b2ecb321 (patch) | |
| tree | c76af6a3fb23da03ef027428c47f2c15a578310b /drivers/nvme | |
| parent | 96135862dfcce38b98beff7d1009188263b7e6f7 (diff) | |
| download | linux-bea54ef53fce57c8b2f11315c9384e43b2ecb321.tar.bz2 | |
nvme-tcp: Add warning on state change failure at nvme_tcp_setup_ctrl
The transition to LIVE state should not fail in case of a new controller.
Moving to DELETING state before nvme_tcp_create_ctrl() allocates all the
resources may leads to NULL dereference at teardown flow (e.g., IO tagset,
admin_q, connect_q).
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/tcp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index f111430bb617..0ef14f0fad86 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1930,8 +1930,13 @@ static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new) } if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) { - /* state change failure is ok if we're in DELETING state */ + /* + * state change failure is ok if we're in DELETING state, + * unless we're during creation of a new controller to + * avoid races with teardown flow. + */ WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING); + WARN_ON_ONCE(new); ret = -EINVAL; goto destroy_io; } |