1 files changed, 112 insertions, 0 deletions
diff --git a/nuttx/fs/fs_closeblockdriver.c b/nuttx/fs/fs_closeblockdriver.c
new file mode 100644
index 000000000..2151b04df
--- /dev/null
+++ b/nuttx/fs/fs_closeblockdriver.c
@@ -0,0 +1,112 @@
+/****************************************************************************
+ * fs/fs_closeblockdriver.c
+ *
+ *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in pathname and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of pathname code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <debug.h>
+#include <errno.h>
+#include <nuttx/fs/fs.h>
+
+#include "fs_internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: close_blockdriver
+ *
+ * Description:
+ *   Call the close method and release the inode
+ *
+ * Inputs:
+ *   inode - reference to the inode of a block driver opened by open_blockdriver
+ *
+ * Return:
+ *   Returns zero on success or a negated errno on failure:
+ *
+ *   EINVAL  - inode is NULL
+ *   ENOTBLK - The inode is not a block driver
+ *
+ ****************************************************************************/
+
+int close_blockdriver(FAR struct inode *inode)
+{
+  int ret = 0; /* Assume success */
+
+  /* Sanity checks */
+
+#ifdef CONFIG_DEBUG
+  if (!inode || !inode->u.i_bops)
+    {
+      ret = -EINVAL;
+      goto errout;
+    }
+#endif
+
+  /* Verify that the inode is a block driver. */
+
+  if (!INODE_IS_BLOCK(inode))
+    { 
+      fdbg("inode is not a block driver\n");
+      ret = -ENOTBLK;
+      goto errout;
+   }
+
+  /* Close the block driver.  Not that no mutually exclusive access
+   * to the driver is enforced here.  That must be done in the driver
+   * if needed.
+   */
+
+  if (inode->u.i_bops->close)
+    {
+      ret = inode->u.i_bops->close(inode);
+    }
+
+  /* Then release the reference on the inode */
+
+  inode_release(inode);
+
+errout:
+  return ret;
+}