Steffen Maier 645603ab5f scsi: zfcp: Defer fc_rport blocking until after ADISC response ... commit e658519890 upstream. Storage devices are free to send RSCNs, e.g. for internal state changes. If this happens on all connected paths, zfcp risks temporarily losing all paths at the same time. This has strong requirements on multipath configuration such as "no_path_retry queue". Avoid such situations by deferring fc_rport blocking until after the ADISC response, when any actual state change of the remote port became clear. The already existing port recovery triggers explicitly block the fc_rport. The triggers are: on ADISC reject or timeout (typical cable pull case), and on ADISC indicating that the remote port has changed its WWPN or the port is meanwhile no longer open. As a side effect, this also removes a confusing direct function call to another work item function zfcp_scsi_rport_work() instead of scheduling that other work item. It was probably done that way to have the rport block side effect immediate and synchronous to the caller. Fixes: a2fa0aede0 ("[SCSI] zfcp: Block FC transport rports early on errors") Cc: stable@vger.kernel.org #v2.6.30+ Reviewed-by: Benjamin Block <bblock@linux.ibm.com> Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com> Signed-off-by: Steffen Maier <maier@linux.ibm.com> Link: https://lore.kernel.org/r/20230724145156.3920244-1-maier@linux.ibm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-11 12:08:19 +02:00
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block	s390/dasd: print copy pair message only for the correct error	2023-08-03 10:24:16 +02:00
char	s390/early: fix sclp_early_sccb variable lifetime	2023-03-10 09:32:53 +01:00
cio	s390/cio: unregister device when the only path is gone	2023-06-28 11:12:37 +02:00
crypto	s390/zcrypt: do not retry administrative requests	2023-07-23 13:49:35 +02:00
net	s390/qeth: Don't call dev_close/dev_open (DOWN/UP)	2023-08-11 12:08:17 +02:00
scsi	scsi: zfcp: Defer fc_rport blocking until after ADISC response	2023-08-11 12:08:19 +02:00
virtio	virtio: Revert "virtio: find_vqs() add arg sizes"	2022-08-16 01:40:24 -04:00
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