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nvme: requeue namespace scan on missed AENs

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Scanning for namespaces can take some time, so if the target is
reconfigured while the scan is running we may miss a Attached Namespace
Attribute Changed AEN.

Check if the NVME_AER_NOTICE_NS_CHANGED bit is set once the scan has
finished, and requeue scanning to pick up any missed change.

Signed-off-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Hannes Reinecke
2025-04-03 09:19:29 +02:00
committed by Christoph Hellwig
parent 72070e57b0
commit 9546ad1a9b
1 changed files with 4 additions and 0 deletions
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4
drivers/nvme/host/core.c
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@@ -4295,6 +4295,10 @@ 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);
}
/*