It was found that on da850evm, where the NAND ECC used does not map all 0xff data to 0xff ECC, that flashing UBI and JFFS2 image from U-boot with nand write[.e] command resulted in alot of ECC errors... for UBI the result was an unmountable filesystem on second attach from linux. For JFFS2 the result was a multitude of ECC errors printed on the cosole on the second mount in Linux -- the filesystem remains mountable for awhile but eventually collapses.
By implementing the procedure reccomended in the UBI FAQ of dropping trailing pages containing entirely 0xff both UBI images and JFFS2 filesystems flashed with from u-boot were found to survive past the second time around.
Ben Gardiner (5): nand_base: trivial: fix comment read/write comment nand_util: convert nand_write_skip_bad() to flags nand_util: drop trailing all-0xff pages if requested cmd_nand: add nand write.ubi command cmd_nand: also drop 0xff pages for jffs2
common/cmd_nand.c | 15 ++++++++++++--- drivers/mtd/nand/nand_base.c | 2 +- drivers/mtd/nand/nand_util.c | 37 ++++++++++++++++++++++++++++++------- include/nand.h | 6 +++++- 4 files changed, 48 insertions(+), 12 deletions(-)