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authorQinglang Miao <miaoqinglang@huawei.com>2021-04-14 19:08:03 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2021-04-15 22:19:40 -0400
commitbe46e39ae3be8cde8dd0d09d7c0f8eed443747ab (patch)
treef03f5cb5ec437b3b84f25eb3312897fac2918bdb
parent20540a5645f00015ca8eb968b98d62a1b275ceb8 (diff)
scsi: zfcp: Move the position of put_device()
Place the put_device() call after device_unregister() in both zfcp_unit_remove() and zfcp_sysfs_port_remove_store() to make it more natural. put_device() ought to be the last time we touch the object in both functions. Add comments after put_device() to make code clearer. Link: https://lore.kernel.org/r/0a568c7733ba0f1dde28b0c663b90270d44dd540.1618417667.git.bblock@linux.ibm.com Suggested-by: Steffen Maier <maier@linux.ibm.com> Suggested-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/s390/scsi/zfcp_sysfs.c4
-rw-r--r--drivers/s390/scsi/zfcp_unit.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c
index f76946dcbd59..544efd4c42f0 100644
--- a/drivers/s390/scsi/zfcp_sysfs.c
+++ b/drivers/s390/scsi/zfcp_sysfs.c
@@ -327,10 +327,10 @@ static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
list_del(&port->list);
write_unlock_irq(&adapter->port_list_lock);
- put_device(&port->dev);
-
zfcp_erp_port_shutdown(port, 0, "syprs_1");
device_unregister(&port->dev);
+
+ put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
out:
zfcp_ccw_adapter_put(adapter);
return retval ? retval : (ssize_t) count;
diff --git a/drivers/s390/scsi/zfcp_unit.c b/drivers/s390/scsi/zfcp_unit.c
index e67bf7388cae..59333f0257a8 100644
--- a/drivers/s390/scsi/zfcp_unit.c
+++ b/drivers/s390/scsi/zfcp_unit.c
@@ -255,9 +255,9 @@ int zfcp_unit_remove(struct zfcp_port *port, u64 fcp_lun)
scsi_device_put(sdev);
}
- put_device(&unit->dev);
-
device_unregister(&unit->dev);
+ put_device(&unit->dev); /* undo _zfcp_unit_find() */
+
return 0;
}