[PATCH v2 0/1] nvme/mpath: fix hang when disk goes live over reconnect

[Anton Eidelman <anton.eidelman@gmail.com>]

Revising the original v1 patch submitted on Sep 18, 2021,
which deferred nvme_read_ana_log() until nvme_start_ctrl()
and raised concerns since the former might fail,
while the latter does not currently return an error.
I did not see appropriate to introduce error handling
in the nvme_start_ctrl() call-sites.

Instead, this patch keeps the nvme_read_ana_log() in its original
place inside nvme_mpath_init_identify(),
but defers updating of the existing ns path state
until the ctrl IO queues are enabled in nvme_start_ctrl().

This way the handling of failures to retrieve the ANA log remains intact,
while the mpath update is deferred until it's safe to do.

Anton Eidelman (1):
  nvme/mpath: fix hang when disk goes live over reconnect

 drivers/nvme/host/core.c      |  1 +
 drivers/nvme/host/multipath.c | 12 +++++++++++-
 drivers/nvme/host/nvme.h      |  4 ++++
 3 files changed, 16 insertions(+), 1 deletion(-)

-- 
2.25.1