+
+/**
+ * ubi_leb_read_sg - read data into a scatter gather list.
+ * @desc: volume descriptor
+ * @lnum: logical eraseblock number to read from
+ * @buf: buffer where to store the read data
+ * @offset: offset within the logical eraseblock to read from
+ * @len: how many bytes to read
+ * @check: whether UBI has to check the read data's CRC or not.
+ *
+ * This function works exactly like ubi_leb_read_sg(). But instead of
+ * storing the read data into a buffer it writes to an UBI scatter gather
+ * list.
+ */
+int ubi_leb_read_sg(struct ubi_volume_desc *desc, int lnum, struct ubi_sgl *sgl,
+ int offset, int len, int check)
+{
+ struct ubi_volume *vol = desc->vol;
+ struct ubi_device *ubi = vol->ubi;
+ int err, vol_id = vol->vol_id;
+
+ dbg_gen("read %d bytes from LEB %d:%d:%d", len, vol_id, lnum, offset);
+
+ err = leb_read_sanity_check(desc, lnum, offset, len);
+ if (err < 0)
+ return err;
+
+ if (len == 0)
+ return 0;
+
+ err = ubi_eba_read_leb_sg(ubi, vol, sgl, lnum, offset, len, check);
+ if (err && mtd_is_eccerr(err) && vol->vol_type == UBI_STATIC_VOLUME) {
+ ubi_warn(ubi, "mark volume %d as corrupted", vol_id);
+ vol->corrupted = 1;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(ubi_leb_read_sg);
+