On 07/18/2016 09:18 AM, Hector Palacios wrote:

nand_do_write_ops() determines if it is writing a partial page with the formula: if (column || (writelen < mtd->writesize - 1))

When 'writelen' is exactly 1 byte less than the NAND page size the formula equates to zero, so the code doesn't process it as a partial write, although it should. As a consequence the function remains in the while(1) loop with 'writelen' becoming 0xffffffff and iterating until the watchdog timeout triggers.

To reproduce the issue on a NAND with 2K page (0x800): => nand erase.part <partition> => nand write $loadaddr <partition> 7ff

Signed-off-by: Hector Palacios hector.palacios@digi.com

https://jira.digi.com/browse/DUB-619

drivers/mtd/nand/nand_base.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index c0e381ad2d15..cb15bb21e2f0 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2524,7 +2524,7 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,

WATCHDOG_RESET();
/* Partial page write? */

• if (unlikely(column || writelen < (mtd->writesize - 1))) {
  

• if (unlikely(column || writelen < mtd->writesize)) {
  cached = 0;
  bytes = min_t(int, bytes - column, (int) writelen);
  chip->pagebuf = -1;
  
  

Please disregard. This patch was generated over U-Boot v2015.04. I sent a corrected v2 patch.

-- Hector Palacios