+ ops->retlen = read;
+ ops->oobretlen = oobread;
+
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0;
+}
+
+/**
+ * onenand_read_oob_nolock - [MTD Interface] OneNAND read out-of-band
+ * @param mtd MTD device structure
+ * @param from offset to read from
+ * @param ops oob operation description structure
+ *
+ * OneNAND read out-of-band data from the spare area
+ */
+static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from,
+ struct mtd_oob_ops *ops)
+{
+ struct onenand_chip *this = mtd->priv;
+ struct mtd_ecc_stats stats;
+ int read = 0, thislen, column, oobsize;
+ size_t len = ops->ooblen;
+ mtd_oob_mode_t mode = ops->mode;
+ u_char *buf = ops->oobbuf;
+ int ret = 0;
+
+ from += ops->ooboffs;
+
+ MTDDEBUG(MTD_DEBUG_LEVEL3,
+ "onenand_read_oob_nolock: from = 0x%08x, len = %i\n",
+ (unsigned int) from, (int) len);
+
+ /* Initialize return length value */
+ ops->oobretlen = 0;
+
+ if (mode == MTD_OOB_AUTO)
+ oobsize = this->ecclayout->oobavail;
+ else
+ oobsize = mtd->oobsize;
+
+ column = from & (mtd->oobsize - 1);
+
+ if (unlikely(column >= oobsize)) {
+ printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
+ return -EINVAL;
+ }
+
+ /* Do not allow reads past end of device */
+ if (unlikely(from >= mtd->size ||
+ column + len > ((mtd->size >> this->page_shift) -
+ (from >> this->page_shift)) * oobsize)) {
+ printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
+ return -EINVAL;
+ }
+
+ stats = mtd->ecc_stats;
+
+ while (read < len) {
+ thislen = oobsize - column;
+ thislen = min_t(int, thislen, len);
+
+ this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
+
+ onenand_update_bufferram(mtd, from, 0);
+
+ ret = this->wait(mtd, FL_READING);
+ if (ret && ret != -EBADMSG) {
+ printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
+ break;
+ }
+
+ if (mode == MTD_OOB_AUTO)
+ onenand_transfer_auto_oob(mtd, buf, column, thislen);
+ else
+ this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
+
+ read += thislen;
+
+ if (read == len)
+ break;
+
+ buf += thislen;
+
+ /* Read more? */
+ if (read < len) {
+ /* Page size */
+ from += mtd->writesize;
+ column = 0;
+ }
+ }
+
+ ops->oobretlen = read;
+
+ if (ret)
+ return ret;
+
+ if (mtd->ecc_stats.failed - stats.failed)
+ return -EBADMSG;
+
+ return 0;