diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_sysfs.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 7ec30ded0169..8d9662e8b717 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -216,20 +216,32 @@ static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev, { struct ccw_device *cdev = to_ccwdev(dev); struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); + int retval = 0; if (!adapter) return -ENODEV; /* + * If `scsi_host` is missing, we can't schedule `scan_work`, as it + * makes use of the corresponding fc_host object. But this state is + * only possible if xconfig/xport data has never completed yet, + * and we couldn't successfully scan for ports anyway. + */ + if (adapter->scsi_host == NULL) { + retval = -ENODEV; + goto out; + } + + /* * Users wish is our command: immediately schedule and flush a * worker to conduct a synchronous port scan, that is, neither * a random delay nor a rate limit is applied here. */ queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0); flush_delayed_work(&adapter->scan_work); +out: zfcp_ccw_adapter_put(adapter); - - return (ssize_t) count; + return retval ? retval : (ssize_t) count; } static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL, zfcp_sysfs_port_rescan_store); |