1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/staging/vt6656/tether.c b/drivers/staging/vt6656/tether.c
new file mode 100644
index 00000000000..2ef54f608cb
--- /dev/null
+++ b/drivers/staging/vt6656/tether.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2003 VIA Networking, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *
+ * File: tether.c
+ *
+ * Purpose:
+ *
+ * Author: Tevin Chen
+ *
+ * Date: May 21, 1996
+ *
+ * Functions:
+ *      ETHbIsBufferCrc32Ok - Check CRC value of the buffer if Ok or not
+ *
+ * Revision History:
+ *
+ */
+
+#include "device.h"
+#include "tmacro.h"
+#include "tether.h"
+
+/*
+ * Description: Check CRC value of the buffer if Ok or not
+ *
+ * Parameters:
+ *  In:
+ *		pbyBuffer	    - pointer of buffer (normally is rx buffer)
+ *		cbFrameLength	- length of buffer, including CRC portion
+ *  Out:
+ *      none
+ *
+ * Return Value: true if ok; false if error.
+ *
+ */
+bool ETHbIsBufferCrc32Ok(u8 * pbyBuffer, unsigned int cbFrameLength)
+{
+	u32 n_crc = ~ether_crc_le(cbFrameLength - 4, pbyBuffer);
+
+	if (le32_to_cpu(*((__le32 *)(pbyBuffer + cbFrameLength - 4))) != n_crc)
+		return false;
+
+	return true;
+}
+