[SCSI] zfcp: Replace local reference counting with common kref

Replace the local reference counting by already available mechanisms
offered by kref. Where possible existing device structures were used,
including the same functionality.

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>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/s390/scsi/zfcp_cfdc.c b/drivers/s390/scsi/zfcp_cfdc.c
index ef681dfed0c..856f82dbcb1 100644
--- a/drivers/s390/scsi/zfcp_cfdc.c
+++ b/drivers/s390/scsi/zfcp_cfdc.c
@@ -98,7 +98,7 @@ static struct zfcp_adapter *zfcp_cfdc_get_adapter(u32 devno)
         if (!adapter)
                 goto out_put;
 
-        zfcp_adapter_get(adapter);
+        kref_get(&adapter->ref);
 out_put:
         put_device(&ccwdev->dev);
 out:
@@ -212,7 +212,6 @@ static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
                 retval = -ENXIO;
                 goto free_buffer;
         }
-        zfcp_adapter_get(adapter);
 
         retval = zfcp_cfdc_sg_setup(data->command, fsf_cfdc->sg,
                                     data_user->control_file);
@@ -245,7 +244,7 @@ static long zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
  free_sg:
         zfcp_sg_free_table(fsf_cfdc->sg, ZFCP_CFDC_PAGES);
  adapter_put:
-        zfcp_adapter_put(adapter);
+        kref_put(&adapter->ref, zfcp_adapter_release);
  free_buffer:
         kfree(data);
  no_mem_sense: