1 /****************************************************************************
2 * drivers/bch/bchlib_teardown.c
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership. The
7 * ASF licenses this file to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance with the
9 * License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
16 * License for the specific language governing permissions and limitations
17 * under the License.
18 *
19 ****************************************************************************/
20
21 /****************************************************************************
22 * Included Files
23 ****************************************************************************/
24 #include <stdlib.h>
25 #include <errno.h>
26 #include <assert.h>
27 #include "bch.h"
28
29 /****************************************************************************
30 * Public Functions
31 ****************************************************************************/
32
33 /****************************************************************************
34 * Name: bchlib_teardown
35 *
36 * Description:
37 * Setup so that the block driver referenced by 'blkdev' can be accessed
38 * similar to a character device.
39 *
40 ****************************************************************************/
41
bchlib_teardown(void * handle)42 int bchlib_teardown(void *handle)
43 {
44 struct bchlib_s *bch = (struct bchlib_s *)handle;
45
46 DEBUGASSERT(handle);
47
48 /* Check that there are not outstanding reference counts on the object */
49
50 if (bch->refs > 0)
51 {
52 return -EBUSY;
53 }
54
55 /* Flush any pending data to the block driver */
56
57 (void)bchlib_flushsector(bch);
58
59 /* Close the block driver */
60
61 (void)close_blockdriver(bch->vnode);
62
63 /* Free the BCH state structure */
64
65 if (bch->buffer)
66 {
67 free(bch->buffer);
68 }
69
70 (void)sem_destroy(&bch->sem);
71 free(bch);
72 return OK;
73 }
74
75