diff options
| author | Keith Busch <kbusch@kernel.org> | 2022-09-19 22:36:46 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-09-27 10:15:56 +0300 |
| commit | bc8fb906b0ff9339b4286698cb7cd9cd5b8c53eb (patch) | |
| tree | 1bc98b4ceaa94bbe968f96c455003e7903aab1c8 /drivers/nvme/target | |
| parent | 99e603874366be1115b40ecbc0e25847186d84ea (diff) | |
| download | linux-bc8fb906b0ff9339b4286698cb7cd9cd5b8c53eb.tar.xz | |
nvme: handle effects after freeing the request
If a reset occurs after the scan work attempts to issue a command, the
reset may quisce the admin queue, which blocks the scan work's command
from dispatching. The scan work will not be able to complete while the
queue is quiesced.
Meanwhile, the reset work will cancel all outstanding admin tags and
wait until all requests have transitioned to idle, which includes the
passthrough request. But the passthrough request won't be set to idle
until after the scan_work flushes, so we're deadlocked.
Fix this by handling the end effects after the request has been freed.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216354
Reported-by: Jonathan Derrick <Jonathan.Derrick@solidigm.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target')
| -rw-r--r-- | drivers/nvme/target/passthru.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c index 6f39a29828b1..94d3153bae54 100644 --- a/drivers/nvme/target/passthru.c +++ b/drivers/nvme/target/passthru.c @@ -215,9 +215,11 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w) { struct nvmet_req *req = container_of(w, struct nvmet_req, p.work); struct request *rq = req->p.rq; + struct nvme_ctrl *ctrl = nvme_req(rq)->ctrl; + u32 effects; int status; - status = nvme_execute_passthru_rq(rq); + status = nvme_execute_passthru_rq(rq, &effects); if (status == NVME_SC_SUCCESS && req->cmd->common.opcode == nvme_admin_identify) { @@ -238,6 +240,9 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w) req->cqe->result = nvme_req(rq)->result; nvmet_req_complete(req, status); blk_mq_free_request(rq); + + if (effects) + nvme_passthru_end(ctrl, effects, req->cmd, status); } static void nvmet_passthru_req_done(struct request *rq, |