[SCSI] zfcp: Remove global config_mutex
The global config_mutex was required for the serialization of a
configuration change within the zfcp driver. This global locking is
now obsolete and can be removed. The requirement of serializing the
access to a zfcp_adapter reference via a ccw_device is realized wth a
static spinlock.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
index 856f82d..f932400 100644
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ b/drivers/s390/scsi/zfcp_cfdc.c
@@ -86,22 +86,17 @@
static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno)
{
char busid[9];
- struct ccw_device *ccwdev;
- struct zfcp_adapter *adapter = NULL;
+ struct ccw_device *cdev;
+ struct zfcp_adapter *adapter;
snprintf(busid, sizeof(busid), "0.0.%04x", devno);
- ccwdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid);
- if (!ccwdev)
- goto out;
+ cdev = get_ccwdev_by_busid(&zfcp_ccw_driver, busid);
+ if (!cdev)
+ return NULL;
- adapter = dev_get_drvdata(&ccwdev->dev);
- if (!adapter)
- goto out_put;
+ adapter = zfcp_ccw_adapter_by_cdev(cdev);
- kref_get(&adapter->ref);
-out_put:
- put_device(&ccwdev->dev);
-out:
+ put_device(&cdev->dev);
return adapter;
}
@@ -244,7 +239,7 @@
free_sg:
zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES);
adapter_put:
- kref_put(&adapter->ref, zfcp_adapter_release);
+ zfcp_ccw_adapter_put(adapter);
free_buffer:
kfree(data);
no_mem_sense:
