[PATCH 1/2] nvme: requeue namespace scan on missed AENs

[Hannes Reinecke]

From: Hannes Reinecke <hare at kernel.org

Scanning for namespaces can take some time, so if the target is
reconfigured while the scan is running we will miss the AEN.
So check if the NVME_AER_NOTICE_NS_CHANGED bit is set once the scan is
finished, and requeue scanning to pick up any missed changes.

Signed-off-by: Hannes Reinecke <hare at kernel.org>
---
 drivers/nvme/host/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 8359d0aa0e44..70f9c2d2b113 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4292,6 +4292,10 @@ static void nvme_scan_work(struct work_struct *work)
 			nvme_scan_ns_sequential(ctrl);
 	}
 	mutex_unlock(&ctrl->scan_lock);
+
+	/* Requeue if we have missed AENs */
+	if (test_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events))
+		nvme_queue_scan(ctrl);
 }
 
 /*
-- 
2.35.3