zfcp: restore: Dont use 0 to indicate invalid LUN in rec trace

This change “zfcp: restore: Dont use 0 to indicate invalid LUN in rec trace” in Linux kernel is authored by Steffen Maier <maier [at] linux.vnet.ibm.com> on Wed Aug 10 18:30:48 2016 +0200.

zfcp: restore: Dont use 0 to indicate invalid LUN in rec trace

bring back
commit d21e9daa63e009ce5b87bbcaa6d11ce48e07bbbe
("[SCSI] zfcp: Dont use 0 to indicate invalid LUN in rec trace")
which was lost with
commit ae0904f60fab7cb20c48d32eefdd735e478b91fb
("[SCSI] zfcp: Redesign of the debug tracing for recovery actions.")

Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes: ae0904f60fab ("[SCSI] zfcp: Redesign of the debug tracing for recovery actions.")
Cc: <stable@vger.kernel.org> #2.6.38+
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This Linux change may have been applied to various maintained Linux releases and you can find Linux releases including commit 0102a30.

There are 3 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 drivers/s390/scsi/zfcp_dbf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 2308253..e6ff199 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -241,7 +241,8 @@ static void zfcp_dbf_set_common(struct zfcp_dbf_rec *rec,
 	if (sdev) {
 		rec->lun_status = atomic_read(&sdev_to_zfcp(sdev)->status);
 		rec->lun = zfcp_scsi_dev_lun(sdev);
-	}
+	} else
+		rec->lun = ZFCP_DBF_INVALID_LUN;
 }
 
 /**

The commit for this change in Linux stable tree is 0102a30 (patch).

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