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nvme: re-read ANA log page after ns scan completes

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When scanning for new namespaces we might have missed an ANA AEN.

The NVMe base spec (NVMe Base Specification v2.1, Figure 151 'Asynchonous
Event Information - Notice': Asymmetric Namespace Access Change) states:

  A controller shall not send this even if an Attached Namespace
  Attribute Changed asynchronous event [...] is sent for the same event.

so we need to re-read the ANA log page after we rescanned the namespace
list to update the ANA states of the new namespaces.

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 09:19:30 +02:00 committed by Christoph Hellwig
parent 9546ad1a9b
commit 62baf70c32
1 changed files with 5 additions and 0 deletions
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5
drivers/nvme/host/core.c
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@ -4299,6 +4299,11 @@ static void nvme_scan_work(struct work_struct *work)
/* Requeue if we have missed AENs */
if (test_bit(NVME_AER_NOTICE_NS_CHANGED, &ctrl->events))
nvme_queue_scan(ctrl);
#ifdef CONFIG_NVME_MULTIPATH
else
/* Re-read the ANA log page to not miss updates */
queue_work(nvme_wq, &ctrl->ana_work);
#endif
}
/*