[MTD] NAND: Remove empty block ECC workaround

They fixed the hardware so that ECC doesn't fail on reading an empty
block.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/mtd/nand/cafe.c b/drivers/mtd/nand/cafe.c
index d894c7286aab75742624edfc8aad24ee95074c7d..887040c6c2d6b4017a225d4d990830b996049f0e 100644 (file)
--- a/drivers/mtd/nand/cafe.c
+++ b/drivers/mtd/nand/cafe.c
@@ -356,26 +356,6 @@ static int cafe_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
  * The hw generator calculates the error syndrome automatically. Therefor
  * we need a special oob layout and handling.
  */
-
-static unsigned short cafe_empty_syndromes[8] = { 4095, 748, 2629, 2920, 875, 1454, 51, 1456 };
-
-static int is_all_ff(unsigned char *buf, int len)
-{
-       unsigned long *lbuf = (void *)buf;
-       int i;
-
-       for (i=0; i < (len/sizeof(long)); i++) {
-               if (lbuf[i] != ~0UL)
-                       return 0;
-       }
-       i *= sizeof(long);
-       for (; i< len; i++) {
-               if (buf[i] != 0xff)
-                       return 0;
-       }
-       return 1;
-}
-
 static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
                               uint8_t *buf)
 {
@@ -398,13 +378,7 @@ static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
                        syn[i+1] = (tmp >> 16) & 0xfff;
                } 
 
-               /* FIXME: http://dev.laptop.org/ticket/215 */
-               if (!memcmp(syn, cafe_empty_syndromes, sizeof(syn))
-                   && is_all_ff(chip->oob_poi, 14)
-                   && is_all_ff(buf, mtd->writesize)) {
-                       dev_dbg(&cafe->pdev->dev, "ECC error reported on empty block\n");
-                       /* It was an empty block. Nothing to fix here except the hardware */
-               } else if ((i = cafe_correct_ecc(buf, syn)) < 0) {
+               if ((i = cafe_correct_ecc(buf, syn)) < 0) {
                        dev_dbg(&cafe->pdev->dev, "Failed to correct ECC\n");
                        mtd->ecc_stats.failed++;
                } else {