V6.1 tarragon - Upgrade to Linux 6.1.142 #12

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Merged

lategoodbye merged 10,000 commits into v6.1-tarragon from v6.1-tarragon_upgrade_142

Jul 7, 2025

Merged

V6.1 tarragon - Upgrade to Linux 6.1.142 #12

scsi: s390: zfcp: Ensure synchronous unit_add

commit 9697ca0 upstream.

Improve the usability of the unit_add sysfs attribute by ensuring that
the associated FCP LUN scan processing is completed synchronously.  This
enables configuration tooling to consistently determine the end of the
scan process to allow for serialization of follow-on actions.

While the scan process associated with unit_add typically completes
synchronously, it is deferred to an asynchronous background process if
unit_add is used before initial remote port scanning has completed.  This
occurs when unit_add is used immediately after setting the associated FCP
device online.

To ensure synchronous unit_add processing, wait for remote port scanning
to complete before initiating the FCP LUN scan.

Cc: [email protected]
Reviewed-by: M Nikhil <[email protected]>
Reviewed-by: Nihar Panda <[email protected]>
Signed-off-by: Peter Oberparleiter <[email protected]>
Signed-off-by: Nihar Panda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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oberpar authored and gregkh committed Jun 27, 2025

commit d655382cb58b4881264df1853f374017b10b0725

drivers/s390/scsi/zfcp_sysfs.c

-Original file line number
+Diff line change
@@ Expand Up @@
     	if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
     		return -EINVAL;
+    	flush_work(&port->rport_work);
     	retval = zfcp_unit_add(port, fcp_lun);
     	if (retval)
     		return retval;
@@ Expand Down @@

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