[PATCH v8 03/13] nvmet: add return value to nvmet_add_async_event()

[Logan Gunthorpe]

From: Chaitanya Kulkarni <chaitanya.kulka...@wdc.com>

Change the return value for nvmet_add_async_event().

This change is needed for the target passthru code which will
submit async events on namespaces changes and can fail the command
should adding the event fail (on -ENOMEM).

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulka...@wdc.com>
[log...@deltatee.com:
 * fleshed out commit message
 * change to using int as a return type instead of bool
]
Signed-off-by: Logan Gunthorpe <log...@deltatee.com>
---
 drivers/nvme/target/core.c  | 6 ++++--
 drivers/nvme/target/nvmet.h | 2 +-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 3a67e244e568..d6dcb86d8be7 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -173,14 +173,14 @@ static void nvmet_async_event_work(struct work_struct 
*work)
        }
 }
 
-void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,
+int nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,
                u8 event_info, u8 log_page)
 {
        struct nvmet_async_event *aen;
 
        aen = kmalloc(sizeof(*aen), GFP_KERNEL);
        if (!aen)
-               return;
+               return -ENOMEM;
 
        aen->event_type = event_type;
        aen->event_info = event_info;
@@ -191,6 +191,8 @@ void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 
event_type,
        mutex_unlock(&ctrl->lock);
 
        schedule_work(&ctrl->async_event_work);
+
+       return 0;
 }
 
 static void nvmet_add_to_changed_ns_log(struct nvmet_ctrl *ctrl, __le32 nsid)
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index c51f8dd01dc4..3d313a6452cc 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -441,7 +441,7 @@ void nvmet_port_disc_changed(struct nvmet_port *port,
                struct nvmet_subsys *subsys);
 void nvmet_subsys_disc_changed(struct nvmet_subsys *subsys,
                struct nvmet_host *host);
-void nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,
+int nvmet_add_async_event(struct nvmet_ctrl *ctrl, u8 event_type,
                u8 event_info, u8 log_page);
 
 #define NVMET_QUEUE_SIZE       1024
-- 
2.20.1