Hello,

On Mon, Jul 26, 2010 at 06:24:46PM +0200, Alexis RODET wrote:

Hello,

I have a custom board with 1 i.MX27 microcontroller and 1 Numonyx NAND
256MiB 1,8V 8-bit connected on the nfc port.
I manage to read and write in that nand flash from redboot but not from
Linux which crashes.
I tested with Linux stable 2.6.34.1 + board support modification.
I have tested with and without hw_ecc = 1 and get the same crash at
send_cmd+0x20/0x34.
Could you give me any advise to debug this ?

I would start with enabling CONFIG_MTD_DEBUG and setting
CONFIG_MTD_DEBUG_VERBOSE=3.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-K?nig            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |