diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2021-03-15 15:34:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-24 11:26:38 +0100 |
| commit | 49545a7b8b3048ecce44f97f4393d03c80410003 (patch) | |
| tree | 3bb8537ff7846e0bf3eae6f4658257089bb70d83 /drivers/nvme | |
| parent | cf7d7728d8a5e6740febf58759b6ede8275cd88e (diff) | |
nvmet: don't check iosqes,iocqes for discovery controllers
commit d218a8a3003e84ab136e69a4e30dd4ec7dab2d22 upstream.
From the base spec, Figure 78:
"Controller Configuration, these fields are defined as parameters to
configure an "I/O Controller (IOC)" and not to configure a "Discovery
Controller (DC).
...
If the controller does not support I/O queues, then this field shall
be read-only with a value of 0h
Just perform this check for I/O controllers.
Fixes: a07b4970f464 ("nvmet: add a generic NVMe target")
Reported-by: Belanger, Martin <Martin.Belanger@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/core.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index cca5a00c098a..ee81d94fe810 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -1031,9 +1031,20 @@ static void nvmet_start_ctrl(struct nvmet_ctrl *ctrl) { lockdep_assert_held(&ctrl->lock); - if (nvmet_cc_iosqes(ctrl->cc) != NVME_NVM_IOSQES || - nvmet_cc_iocqes(ctrl->cc) != NVME_NVM_IOCQES || - nvmet_cc_mps(ctrl->cc) != 0 || + /* + * Only I/O controllers should verify iosqes,iocqes. + * Strictly speaking, the spec says a discovery controller + * should verify iosqes,iocqes are zeroed, however that + * would break backwards compatibility, so don't enforce it. + */ + if (ctrl->subsys->type != NVME_NQN_DISC && + (nvmet_cc_iosqes(ctrl->cc) != NVME_NVM_IOSQES || + nvmet_cc_iocqes(ctrl->cc) != NVME_NVM_IOCQES)) { + ctrl->csts = NVME_CSTS_CFS; + return; + } + + if (nvmet_cc_mps(ctrl->cc) != 0 || nvmet_cc_ams(ctrl->cc) != 0 || nvmet_cc_css(ctrl->cc) != 0) { ctrl->csts = NVME_CSTS_CFS; |