UBI: rename IO error code

[pandora-kernel.git] / drivers / mtd / ubi / io.c

diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index 332f992..05774da 100644 (file)
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -517,7 +517,7 @@ static int nor_erase_prepare(struct ubi_device *ubi, int pnum)
         * In this case we probably anyway have garbage in this PEB.
         */
        err1 = ubi_io_read_vid_hdr(ubi, pnum, &vid_hdr, 0);
-       if (err1 == UBI_IO_BAD_HDR_READ || err1 == UBI_IO_BAD_HDR)
+       if (err1 == UBI_IO_BAD_HDR_EBADMSG || err1 == UBI_IO_BAD_HDR)
                /*
                 * The VID header is corrupted, so we can safely erase this
                 * PEB and not afraid that it will be treated as a valid PEB in
@@ -712,6 +712,8 @@ bad:
  *   and corrected by the flash driver; this is harmless but may indicate that
  *   this eraseblock may become bad soon (but may be not);
  * o %UBI_IO_BAD_HDR if the erase counter header is corrupted (a CRC error);
+ * o %UBI_IO_BAD_HDR_EBADMSG is the same as %UBI_IO_BAD_HDR, but there also was
+ *   a data integrity error (uncorrectable ECC error in case of NAND);
  * o %UBI_IO_PEB_EMPTY if the physical eraseblock is empty;
  * o a negative error code in case of failure.
  */
@@ -731,15 +733,15 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
 
                /*
                 * We read all the data, but either a correctable bit-flip
-                * occurred, or MTD reported about some data integrity error,
-                * like an ECC error in case of NAND. The former is harmless,
-                * the later may mean that the read data is corrupted. But we
-                * have a CRC check-sum and we will detect this. If the EC
-                * header is still OK, we just report this as there was a
-                * bit-flip.
+                * occurred, or MTD reported a data integrity error
+                * (uncorrectable ECC error in case of NAND). The former is
+                * harmless, the later may mean that the read data is
+                * corrupted. But we have a CRC check-sum and we will detect
+                * this. If the EC header is still OK, we just report this as
+                * there was a bit-flip, to force scrubbing.
                 */
                if (err == -EBADMSG)
-                       read_err = UBI_IO_BAD_HDR_READ;
+                       read_err = UBI_IO_BAD_HDR_EBADMSG;
        }
 
        magic = be32_to_cpu(ec_hdr->magic);
@@ -983,6 +985,8 @@ bad:
  *   this eraseblock may become bad soon;
  * o %UBI_IO_BAD_HDR if the volume identifier header is corrupted (a CRC
  *   error detected);
+ * o %UBI_IO_BAD_HDR_EBADMSG is the same as %UBI_IO_BAD_HDR, but there also was
+ *   a data integrity error (uncorrectable ECC error in case of NAND);
  * o %UBI_IO_PEB_FREE if the physical eraseblock is free (i.e., there is no VID
  *   header there);
  * o a negative error code in case of failure.
@@ -1006,14 +1010,15 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
 
                /*
                 * We read all the data, but either a correctable bit-flip
-                * occurred, or MTD reported about some data integrity error,
-                * like an ECC error in case of NAND. The former is harmless,
-                * the later may mean the read data is corrupted. But we have a
-                * CRC check-sum and we will identify this. If the VID header is
-                * still OK, we just report this as there was a bit-flip.
+                * occurred, or MTD reported a data integrity error
+                * (uncorrectable ECC error in case of NAND). The former is
+                * harmless, the later may mean that the read data is
+                * corrupted. But we have a CRC check-sum and we will detect
+                * this. If the VID header is still OK, we just report this as
+                * there was a bit-flip, to force scrubbing.
                 */
                if (err == -EBADMSG)
-                       read_err = UBI_IO_BAD_HDR_READ;
+                       read_err = UBI_IO_BAD_HDR_EBADMSG;
        }
 
        magic = be32_to_cpu(vid_hdr->magic);