For the udev rules that create symbolic links under /dev it is essential that all sysfs attributes are registered before an object becomes visible. This patch avoids that udevd fails to create the /dev/disk/by-id/nvme-uuid.* symbolic link.

Fixes: 2b9b6e86bca7 ("NVMe: Export namespace attributes to sysfs") Signed-off-by: Bart Van Assche bart.vanassche@wdc.com Cc: Keith Busch keith.busch@intel.com Cc: Sagi Grimberg sagi@grimberg.me Cc: Matias Bjorling mb@lightnvm.io Cc: stable@vger.kernel.org --- drivers/nvme/host/core.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index dd8ec1dd9219..f4b880c8abe6 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2734,6 +2734,11 @@ const struct attribute_group nvme_ns_id_attr_group = { .is_visible = nvme_ns_id_attrs_are_visible, };

+static const struct attribute_group *nvme_attr_groups[] = { + &nvme_ns_id_attr_group, + NULL +}; + #define nvme_show_str_function(field) \ static ssize_t field##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ @@ -3099,11 +3104,13 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)

nvme_get_ctrl(ctrl);

+ WARN_ON_ONCE(disk_to_dev(ns->disk)->groups); + disk_to_dev(ns->disk)->groups = nvme_attr_groups; device_add_disk(ctrl->device, ns->disk); - if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj, - &nvme_ns_id_attr_group)) - pr_warn("%s: failed to create sysfs group for identification\n", - ns->disk->disk_name); + /* + * To do: remove nvme_nvm_register_sysfs() and add the nvm attribute + * groups to nvme_attr_groups. + */ if (ns->ndev && nvme_nvm_register_sysfs(ns)) pr_warn("%s: failed to register lightnvm sysfs group for identification\n", ns->disk->disk_name); @@ -3132,8 +3139,6 @@ static void nvme_ns_remove(struct nvme_ns *ns)

nvme_fault_inject_fini(ns); if (ns->disk && ns->disk->flags & GENHD_FL_UP) { - sysfs_remove_group(&disk_to_dev(ns->disk)->kobj, - &nvme_ns_id_attr_group); if (ns->ndev) nvme_nvm_unregister_sysfs(ns); del_gendisk(ns->disk);