[ Upstream commit a89fcca8185633993018dc081d6b021d005e6d0b ]
Commit 1b1031ca63b2 ("nvme: validate cntlid during controller initialisation") introduced a validation for controllers with duplicate cntlid that runs on nvme_init_subsystem(). The problem is that the validation relies on ctrl->cntlid, and this value is assigned (from id_ctrl value) after the call for nvme_init_subsystem() in nvme_init_identify() for non-fabrics scenario. That leads to ctrl->cntlid always being 0 in case we have a physical set of controllers in the same subsystem.
This patch fixes that by loading the discovered cntlid id_ctrl value into ctrl->cntlid before the subsystem initialization, only for the non-fabrics case. The patch was tested with emulated nvme devices (qemu) having two controllers in a single subsystem. Without the patch, we couldn't make it work failing in the duplicate check; when running with the patch, we could see the subsystem holding both controllers.
For the fabrics case we see ctrl->cntlid has a more intricate relation with the admin connect, so we didn't change that.
Fixes: 1b1031ca63b2 ("nvme: validate cntlid during controller initialisation") Signed-off-by: Guilherme G. Piccoli gpiccoli@canonical.com Reviewed-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Sagi Grimberg sagi@grimberg.me Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 601509b3251ae..963b4c6309b9c 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2549,6 +2549,9 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) goto out_free; }
+ if (!(ctrl->ops->flags & NVME_F_FABRICS)) + ctrl->cntlid = le16_to_cpu(id->cntlid); + if (!ctrl->identified) { int i;
@@ -2649,7 +2652,6 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) goto out_free; } } else { - ctrl->cntlid = le16_to_cpu(id->cntlid); ctrl->hmpre = le32_to_cpu(id->hmpre); ctrl->hmmin = le32_to_cpu(id->hmmin); ctrl->hmminds = le32_to_cpu(id->hmminds);