cifs: have cifs_cleanup_volume_info not take a double pointer

...as that makes for a cumbersome interface. Make it take a regular
smb_vol pointer and rely on the caller to zero it out if needed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 44376ce..dd06407 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2831,14 +2831,11 @@
 }
 
 void
-cifs_cleanup_volume_info(struct smb_vol **pvolume_info)
+cifs_cleanup_volume_info(struct smb_vol *volume_info)
 {
-	struct smb_vol *volume_info;
-
-	if (!pvolume_info || !*pvolume_info)
+	if (!volume_info)
 		return;
 
-	volume_info = *pvolume_info;
 	kfree(volume_info->username);
 	kzfree(volume_info->password);
 	kfree(volume_info->UNC);
@@ -2847,7 +2844,6 @@
 	kfree(volume_info->iocharset);
 	kfree(volume_info->prepath);
 	kfree(volume_info);
-	*pvolume_info = NULL;
 	return;
 }
 
@@ -2990,7 +2986,7 @@
 	*pvolume_info = volume_info;
 	return rc;
 out:
-	cifs_cleanup_volume_info(&volume_info);
+	cifs_cleanup_volume_info(volume_info);
 	return rc;
 }