+ yaffs_trace(YAFFS_TRACE_MTD,
+ "yaffs_mtd_write(%p, %d, %p, %d, %p, %d)\n",
+ dev, nand_chunk, data, data_len, oob, oob_len);
+
+ if (!data || !data_len) {
+ data = NULL;
+ data_len = 0;
+ }
+
+ if (!oob || !oob_len) {
+ oob = NULL;
+ oob_len = 0;
+ }
+