Bug fix / safty measure for cfi_flash.c

Without this additional check a flash that was defined in the config file with different size then the one reported by the flash chip itself. will cause array overrun and crash.

the additional CONFIG_FORCE_FLASH_BANK_SIZE allows to set the size ignoring the chip actual size

diff -x .svn -Nuar u-boot.git-5ffa76a032279bc6d3230b703eda32d13305ba13/drivers/cfi_flash.c u-boot.exsw6000/drivers/cfi_flash.c
--- u-boot.git-5ffa76a032279bc6d3230b703eda32d13305ba13/drivers/cfi_flash.c

2007-06-18 22:38:46.000000000 +0300

+++ u-boot.exsw6000/drivers/cfi_flash.c 2007-06-20 19:05:01.000000000 +0300 @@ -1281,7 +1281,7 @@
erase_region_count = (tmp & 0xffff) + 1;
debug ("erase_region_count = %d erase_region_size = %d\n", erase_region_count, erase_region_size);
- for (j = 0; j < erase_region_count; j++) {
+ for (j = 0; j < erase_region_count && sect_cnt < CFG_MAX_FLASH_SECT; j++) { info->start[sect_cnt] = sector;
sector += (erase_region_size * size_ratio);

@@ -1323,6 +1323,9 @@
}

flash_write_cmd (info, 0, 0, info->cmd_reset);
+#if defined(CONFIG_FORCE_FLASH_BANK_SIZE)
+ info->size = CONFIG_FORCE_FLASH_BANK_SIZE;
+#endif
return (info->size);
}

Hi Eran,