[PATCH 2/2] nvmet: print namespace IDs as unsigned 32bit value
From: Mohamed Khalfella
Date: Fri Aug 21 2026 - 19:03:53 EST
struct nvmet_ns.nsid is a u32, but a few messages print it with %d.
An NSID larger than 0x7fffffff is rendered as a negative number, which
is misleading in general and particularly so for the configfs messages
that echo back the NSID the user just asked for.
For example:
[ T200] nvmet: adding nsid -16 to subsystem mysubsystem
Print them with %u. The invalid-NSID error in nvmet_ns_make() keeps its
%#x because the two values it rejects, 0 and NVME_NSID_ALL, are more
readable in hex format. No functional change other than how the NSID is
formatted.
Fixes: a07b4970f464 ("nvmet: add a generic NVMe target")
Fixes: c6925093d0b2 ("nvmet: Optionally use PCI P2P memory")
Fixes: 5a47c2080a73 ("nvmet: support reservation feature")
Signed-off-by: Mohamed Khalfella <mkhalfella@xxxxxxxxxxxxxxx>
---
drivers/nvme/target/configfs.c | 4 ++--
drivers/nvme/target/core.c | 2 +-
drivers/nvme/target/pr.c | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 413ee2d16d29..6286e38436dd 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -814,7 +814,7 @@ static ssize_t nvmet_ns_resv_enable_store(struct config_item *item,
mutex_lock(&ns->subsys->lock);
if (ns->enabled) {
- pr_err("the ns:%d is already enabled.\n", ns->nsid);
+ pr_err("the ns:%u is already enabled.\n", ns->nsid);
mutex_unlock(&ns->subsys->lock);
return -EINVAL;
}
@@ -880,7 +880,7 @@ static struct config_group *nvmet_ns_make(struct config_group *group,
goto out;
config_group_init_type_name(&ns->group, name, &nvmet_ns_type);
- pr_info("adding nsid %d to subsystem %s\n", nsid, subsys->subsysnqn);
+ pr_info("adding nsid %u to subsystem %s\n", nsid, subsys->subsysnqn);
return &ns->group;
out:
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index d74c01c98f19..ad60b91ced6c 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -558,7 +558,7 @@ static void nvmet_p2pmem_ns_add_p2p(struct nvmet_ctrl *ctrl,
if (ret < 0)
pci_dev_put(p2p_dev);
- pr_info("using p2pmem on %s for nsid %d\n", pci_name(p2p_dev),
+ pr_info("using p2pmem on %s for nsid %u\n", pci_name(p2p_dev),
ns->nsid);
}
diff --git a/drivers/nvme/target/pr.c b/drivers/nvme/target/pr.c
index 0948a690a1c0..09d8c63f5680 100644
--- a/drivers/nvme/target/pr.c
+++ b/drivers/nvme/target/pr.c
@@ -145,7 +145,7 @@ static void nvmet_pr_add_resv_log(struct nvmet_ctrl *ctrl, u8 log_type,
log.nsid = cpu_to_le32(nsid);
if (!kfifo_put(&log_mgr->log_queue, log)) {
- pr_info("a reservation log lost, cntlid:%d, log_type:%d, nsid:%d\n",
+ pr_info("a reservation log lost, cntlid:%d, log_type:%d, nsid:%u\n",
ctrl->cntlid, log_type, nsid);
log_mgr->lost_count++;
}
--
2.54.0