Re: pxa3xx-nand failing to find device on linux-next

[Chris Packham <Chris.Packham@alliedtelesis.co.nz>]

On 24/05/17 23:25, Boris Brezillon wrote:
> On Wed, 24 May 2017 13:23:01 +0200
> Boris Brezillon <boris.brezillon@free-electrons.com> wrote:
> 
>> Hi Chris,
>>
>> On Wed, 24 May 2017 09:36:56 +0000
>> Chris Packham <Chris.Packham@alliedtelesis.co.nz> wrote:
>>
>>> On 23/05/17 17:27, Chris Packham wrote:
>>>> Hi,
>>>>
>>>> I'm doing some testing on linux-next and I'm finding that my nand flash
>>>> has disappeared.
>>>>
>>>> pxa3xx-nand f10d0000.flash: This platform can't do DMA on this device
>>>> pxa3xx-nand f10d0000.flash: non-supported command ef
>>>> pxa3xx-nand f10d0000.flash: non-supported command ee
>>>> pxa3xx-nand f10d0000.flash: non-supported command ef
>>>> pxa3xx-nand f10d0000.flash: non-supported command ee
>>>> On-die ECC forcefully enabled, not supported
>>>> nand: No NAND device found
>>>> pxa3xx-nand f10d0000.flash: failed to scan nand at cs 0
>>>>
>>>> This was working around 4.11. I'll try to do some more digging tomorrow
>>>> to narrow down a failure point but I thought I'd send this out now just
>>>> in case it rings any bells.
>>>>
>>>> The board I'm using (DB-88F6820-AMC) is unfortunately out-of tree but it
>>>> should be pretty close to the armada-388-db. I can make my dts available
>>>> if it's helpful.
>>>
>>> Still works on 4.12-rc2. Fails on next-20170524.
>>>
>>> This appears to be due to commit b566d9c055de ("mtd: nand: add support
>>> for Micron on-die ECC"). Which based on the description seems intentional.
>>>
>>> Since I have access to a hardware platform that has a micron flash with
>>> ECC forcefully enabled how can I help to get this implemented.
>>
>> Can you try with this patch applied [1]?
> 
> Sorry, wrong patch. Can you try this one [1] instead?
> 
> [1]http://code.bulix.org/pkfhmi-135875
> 

With the patch above the chip is detected but ubifs is unhappy

ubi0: attaching mtd0
random: fast init done
random: crng init done
ubi0: scanning is finished
ubi0: attached mtd0 (name "pxa3xx_nand-0", size 1024 MiB)
ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192
ubi0: good PEBs: 4088, bad PEBs: 8, corrupted PEBs: 0
ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128
ubi0: max/mean erase counter: 1/0, WL threshold: 4096, image sequence 
number: 1508037110
ubi0: available PEBs: 0, total reserved PEBs: 4088, PEBs reserved for 
bad PEB handling: 72
ubi0: background thread "ubi_bgt0d" started, PID 597
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" started, PID 601
UBIFS (ubi0:0): recovery needed
UBIFS (ubi0:0): recovery completed
UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "user"
UBIFS (ubi0:0): LEB size: 253952 bytes (248 KiB), min./max. I/O unit 
sizes: 4096 bytes/4096 bytes
UBIFS (ubi0:0): FS size: 1016315904 bytes (969 MiB, 4002 LEBs), journal 
size 9404416 bytes (8 MiB, 38 LEBs)
UBIFS (ubi0:0): reserved for root: 0 bytes (0 KiB)
UBIFS (ubi0:0): media format: w4/r0 (latest is w5/r0), UUID 
9D7B5AAA-EFDC-41D4-875B-F9CDB457AE9D, small LPT model
UBIFS error (ubi0:0 pid 599): ubifs_read_node: bad node type (160 but 
expected 0)
UBIFS error (ubi0:0 pid 599): ubifs_read_node: bad node at LEB 10:90344, 
LEB mapping status 1
Not a node, first 24 bytes:
00000000: 00 00 00 00 31 18 10 06 c3 f6 23 f6 3b 00 00 00 00 00 00 00 a0 
00 00 00                          ....1.....#.;...........
CPU: 1 PID: 599 Comm: mount Not tainted 4.12.0-rc2-next-20170524-at1+ #56
Hardware name: Marvell Armada 380/385 (Device Tree)
[<801102dc>] (unwind_backtrace) from [<8010b658>] (show_stack+0x10/0x14)
[<8010b658>] (show_stack) from [<8031aa0c>] (dump_stack+0x88/0x9c)
[<8031aa0c>] (dump_stack) from [<802aebb8>] (ubifs_read_node+0x130/0x284)
[<802aebb8>] (ubifs_read_node) from [<802ca2a4>] 
(ubifs_tnc_read_node+0x4c/0xd4)
[<802ca2a4>] (ubifs_tnc_read_node) from [<802b1e60>] 
(ubifs_tnc_locate+0x1c0/0x1c8)
[<802b1e60>] (ubifs_tnc_locate) from [<802aa15c>] (ubifs_iget+0x78/0x554)
[<802aa15c>] (ubifs_iget) from [<802aa90c>] (ubifs_mount+0x2d4/0x1524)
[<802aa90c>] (ubifs_mount) from [<801dfab4>] (mount_fs+0x14/0xa4)
[<801dfab4>] (mount_fs) from [<801fa6b4>] (vfs_kern_mount+0x4c/0xf4)
[<801fa6b4>] (vfs_kern_mount) from [<801fd738>] (do_mount+0x154/0xb50)
[<801fd738>] (do_mount) from [<801fe49c>] (SyS_mount+0x74/0x9c)
[<801fe49c>] (SyS_mount) from [<801077a0>] (ret_fast_syscall+0x0/0x3c)
UBIFS error (ubi0:0 pid 599): ubifs_iget: failed to read inode 1, error -22
UBIFS (ubi0:0): background thread "ubifs_bgt0_0" stops
ubi0: detaching mtd0
ubi0: mtd0 is detached
ubi0: attaching mtd0
ubi0: scanning is finished
ubi0 error: ubi_read_volume_table: the layout volume was not found
ubi0 error: ubi_attach_mtd_dev: failed to attach mtd0, error -22