arm: mach-imx: cmd_nandbcb fix bad block handling

The badblock should be skipped properly in reading and writing.
Fix the logic. The bcb struct is written, skipping the bad block,
so we need to read using the same logic. This was tested create
bad block in the area and then flash it and read it back.

Acked-by: Han Xu <han.xu@nxp.com>
Tested-By: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>

diff --git a/arch/arm/mach-imx/cmd_nandbcb.c b/arch/arm/mach-imx/cmd_nandbcb.c
index f119e9f..c54f52b 100644 (file)
--- a/arch/arm/mach-imx/cmd_nandbcb.c
+++ b/arch/arm/mach-imx/cmd_nandbcb.c
@@ -506,10 +506,6 @@ static int read_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb,
        int ret = 0;
 
        mtd = boot_cfg->mtd;
-       if (mtd_block_isbad(mtd, off)) {
-               printf("Block %d is bad, skipped\n", (int)CONV_TO_BLOCKS(off));
-               return 1;
-       }
 
        fcb_raw_page = kzalloc(mtd->writesize + mtd->oobsize, GFP_KERNEL);
        if (!fcb_raw_page) {
@@ -530,7 +526,7 @@ static int read_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb,
                else if (plat_config.misc_flags & FCB_ENCODE_BCH_40b)
                        mxs_nand_mode_fcb_40bit(mtd);
 
-               ret = nand_read(mtd, off, &size, (u_char *)fcb);
+               ret = nand_read_skip_bad(mtd, off, &size, NULL, mtd->size, (u_char *)fcb);
 
                /* switch BCH back */
                mxs_nand_mode_normal(mtd);
@@ -617,6 +613,7 @@ static int write_fcb(struct boot_config *boot_cfg, struct fcb_block *fcb)
        for (i = 0; i < g_boot_search_count; i++) {
                if (mtd_block_isbad(mtd, off)) {
                        printf("Block %d is bad, skipped\n", i);
+                       off += mtd->erasesize;
                        continue;
                }
 
@@ -676,20 +673,15 @@ static int read_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
                      void *dbbt_data_page, loff_t off)
 {
        size_t size;
+       size_t actual_size;
        struct mtd_info *mtd;
        loff_t to;
        int ret;
 
        mtd = boot_cfg->mtd;
 
-       if (mtd_block_isbad(mtd, off)) {
-               printf("Block %d is bad, skipped\n",
-                      (int)CONV_TO_BLOCKS(off));
-               return 1;
-       }
-
        size = sizeof(struct dbbt_block);
-       ret = nand_read(mtd, off, &size, (u_char *)dbbt);
+       ret = nand_read_skip_bad(mtd, off, &size, &actual_size, mtd->size, (u_char *)dbbt);
        printf("NAND DBBT read from 0x%llx offset 0x%zx read: %s\n",
               off, size, ret ? "ERROR" : "OK");
        if (ret)
@@ -697,9 +689,9 @@ static int read_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
 
        /* dbbtpages == 0 if no bad blocks */
        if (dbbt->dbbtpages > 0) {
-               to = off + 4 * mtd->writesize;
+               to = off + 4 * mtd->writesize + actual_size - size;
                size = mtd->writesize;
-               ret = nand_read(mtd, to, &size, dbbt_data_page);
+               ret = nand_read_skip_bad(mtd, to, &size, NULL, mtd->size, dbbt_data_page);
                printf("DBBT data read from 0x%llx offset 0x%zx read: %s\n",
                       to, size, ret ? "ERROR" : "OK");
 
@@ -729,6 +721,7 @@ static int write_dbbt(struct boot_config *boot_cfg, struct dbbt_block *dbbt,
                if (mtd_block_isbad(mtd, off)) {
                        printf("Block %d is bad, skipped\n",
                               (int)(i + CONV_TO_BLOCKS(off)));
+                       off += mtd->erasesize;
                        continue;
                }