sync code with last improvements from OpenBSD

lib/libpciaccess/src/common_map.c

@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright IBM Corporation 2007
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+#include "pciaccess.h"
+#include "pciaccess_private.h"
+
+/**
+ * \file common_map.c
+ * Platform independent memory map routines.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+/**
+ * Unmap the specified region using the munmap.
+ *
+ * \param dev    Device whose memory region is to be mapped.
+ * \param map    Memory mapping that is to be undone.
+ *
+ * \return
+ * Zero on success or an \c errno value on failure.
+ *
+ * \sa pci_device_unmap_range
+ */
+_pci_hidden int
+pci_device_generic_unmap_range(struct pci_device *dev,
+			       struct pci_device_mapping *map)
+{
+    return (munmap(map->memory, map->size) == -1) ? errno : 0;
+}