Commit Graph

726 Commits

Author SHA1 Message Date
Michał Kępień
626c84340d kernel: mtk_bmt: refactor to avoid deep recursion
A Linksys E8450 (mt7622) device running current master has recently
started crashing:

    [    0.562900] mtk-ecc 1100e000.ecc: probed
    [    0.570254] spi-nand spi2.0: Fidelix SPI NAND was found.
    [    0.575576] spi-nand spi2.0: 128 MiB, block size: 128 KiB, page size: 2048, OOB size: 64
    [    0.583780] mtk-snand 1100d000.spi: ECC strength: 4 bits per 512 bytes
    [    0.682930] Insufficient stack space to handle exception!
    [    0.682939] ESR: 0x0000000096000047 -- DABT (current EL)
    [    0.682946] FAR: 0xffffffc008c47fe0
    [    0.682948] Task stack:     [0xffffffc008c48000..0xffffffc008c4c000]
    [    0.682951] IRQ stack:      [0xffffffc008008000..0xffffffc00800c000]
    [    0.682954] Overflow stack: [0xffffff801feb00a0..0xffffff801feb10a0]
    [    0.682959] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G S                5.15.107 #0
    [    0.682966] Hardware name: Linksys E8450 (DT)
    [    0.682969] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
    [    0.682975] pc : dequeue_entity+0x0/0x250
    [    0.682988] lr : dequeue_task_fair+0x98/0x290
    [    0.682992] sp : ffffffc008c48030
    [    0.682994] x29: ffffffc008c48030 x28: 0000000000000001 x27: ffffff801feb6380
    [    0.683004] x26: 0000000000000001 x25: ffffff801feb6300 x24: ffffff8000068000
    [    0.683011] x23: 0000000000000001 x22: 0000000000000009 x21: 0000000000000000
    [    0.683017] x20: ffffff801feb6380 x19: ffffff8000068080 x18: 0000000017a740a6
    [    0.683024] x17: ffffffc008bae748 x16: ffffffc008bae6d8 x15: ffffffffffffffff
    [    0.683031] x14: ffffffffffffffff x13: 0000000000000000 x12: 0000000f00000101
    [    0.683038] x11: 0000000000000449 x10: 0000000000000127 x9 : 0000000000000000
    [    0.683044] x8 : 0000000000000125 x7 : 0000000000116da1 x6 : 0000000000116da1
    [    0.683051] x5 : 00000000001165a1 x4 : ffffff801feb6e00 x3 : 0000000000000000
    [    0.683058] x2 : 0000000000000009 x1 : ffffff8000068080 x0 : ffffff801feb6380
    [    0.683066] Kernel panic - not syncing: kernel stack overflow
    [    0.683069] SMP: stopping secondary CPUs
    [    1.648361] SMP: failed to stop secondary CPUs 0-1
    [    1.648366] Kernel Offset: disabled
    [    1.648368] CPU features: 0x00003000,00000802
    [    1.648372] Memory Limit: none

Several factors contributed to this issue:

 1. The mtk_bmt driver recursively calls its scan_bmt() helper function
    during device initialization, while looking for a valid block
    mapping table (BMT).

 2. Commit fa4dc86e98 ("kernel: backport MEMREAD ioctl"):

      - increased the size of some stack-allocated structures (like
	struct mtd_oob_ops, used in bbt_nand_read(), which is indirectly
	called from scan_bmt()),

      - increased the stack size for some functions (for example,
	spinand_mtd_read(), which is indirectly called from scan_bmt(),
	now uses an extra stack-allocated struct mtd_ecc_stats).

 3. OpenWrt currently compiles the kernel with the
    -fno-optimize-sibling-calls flag, which prevents tail-call
    optimization.

Collectively, all of these factors caused stack usage in the mtk_bmt
driver to grow excessively large, triggering stack overflows.

Recursion is not really necessary in scan_bmt() as it simply iterates
over flash memory blocks in reverse order, looking for a valid BMT.
Refactor the logic contained in the scan_bmt() and read_bmt() functions
in target/linux/generic/files/drivers/mtd/nand/mtk_bmt_v2.c so that deep
recursion is prevented (and therefore also any potential stack overflows
it may cause).

Link: https://lists.openwrt.org/pipermail/openwrt-devel/2023-April/040872.html
Signed-off-by: Michał Kępień <openwrt@kempniu.pl>
2023-04-29 12:58:48 +02:00
Álvaro Fernández Rojas
1129b226f7 kernel: ssb: fallback-sprom: check bustype
host_pci is only defined when bustype is SSB_BUSTYPE_PCI.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 21:02:29 +02:00
Álvaro Fernández Rojas
60acbbb1af kernel: bcma: fallback-sprom: check hosttype
host_pci is only defined when hosttype is BCMA_HOSTTYPE_PCI.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 21:02:29 +02:00
Álvaro Fernández Rojas
52e5a8b5cd kernel: bcma: fallback-sprom: align extraction with upstream
The current bcma SPROM extraction from upstream only supports SPROMs with
revisions from 8 to 11.
Let's align the downstream fallback driver with upstream.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 21:02:15 +02:00
Álvaro Fernández Rojas
2c234474a2 kernel: ssb: fallback-sprom: drop mac leftovers
This was left behind when removing the MAC extractions from PCI SPROMs.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 20:13:13 +02:00
Álvaro Fernández Rojas
d5c93d2b85 kernel: ssb: fallback-sprom: optimize struct data
- Remove unneeded mac bytes from struct (it's already present in the SPROM).
- Convert devid_override to boolean.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 20:10:48 +02:00
Álvaro Fernández Rojas
70e88044d5 kernel: bcma: fallback-sprom: optimize struct data
- Remove unneeded mac bytes from struct (it's already present in the SPROM).
- Convert devid_override to boolean.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-24 20:10:28 +02:00
Álvaro Fernández Rojas
e656bcbab0 kernel: add bcma/ssb fallback SPROM support
This adds generic kernel support for Broadcom Fallback SPROMs so that it can be
used in any target, even non Broadcom ones.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2023-04-23 12:18:35 +02:00
Tony Butler
8bc72ea7be treewide: strip useless default n Kconfig lines
Kconfig docs say:
> The default value deliberately defaults to 'n' in order to avoid
> bloating the build.

Apply this rule everywhere, to avoid more cloning of bad examples

Signed-off-by: Tony Butler <spudz76@gmail.com>
2023-02-03 12:50:15 +01:00
Chuanhong Guo
f183ce35b8
kernel: mtk-bmt: fix usage of _oob_read
_oob_read returns number of bitflips on success while
bbt_nand_read should return 0.

Fixes: 2d49e49b18 ("mediatek: bmt: use generic mtd api")
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
2023-01-21 10:54:23 +08:00
Felix Fietkau
4363faef8a kernel: move ubnt ledbar driver to a separate package
Simplifies the tree by removing a non-upstream kernel patch and related kconfig
symbols

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-09-30 11:28:51 +02:00
Yoonji Park
49763d907b kernel: add support for mtdsplit-fit offset
Support devices that has vendor custom header before FIT image.

Some devices has vendor custom header before FIT image. In this case mtd-
split can not find FIT image and it results in rootfs mount failure.
Please refer iptime,a6004mx device for further examples.

Signed-off-by: Yoonji Park <koreapyj@dcmys.kr>
2022-09-12 01:43:49 +01:00
Sven Wegener
53fc987b25 generic: move ledbar driver from mediatek target
This moves the ledbar driver to generic, to be also used by the ramips target.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
2022-09-11 20:26:42 +01:00
Jan Hoffmann
3b1261224a kernel: mtdsplit: add support for H3C VFS filesystem
The bootloader on some H3C devices (for example HPE 1920 switches) only
supports booting from flash by reading an image from an "VFS" filesystem
which spans most of the available flash. The filesystem size is hard-
coded in the bootloader. However, as long as no write operations are
performed in the bootloader menu, it is sufficient if the start of the
partition contains a valid filesystem with the kernel image.

This mtdsplit parser reads the size and location of the kernel image and
finds the location of the rootfs stored after it. It assumes that the
filesystem image matches the layout of one generated by mkh3cvfs, with
a filename of "openwrt-kernel.bin" for the kernel image.

Signed-off-by: Jan Hoffmann <jan@3e8.eu>
2022-07-28 14:08:56 +02:00
Daniel Golle
690f715267
kernel: update FIT partition parser to new property name
The commit "uboot-mediatek: replace patch with accepted commit" changed
the name of the boot configuration property from 'bootconf' to
'u-boot,bootconf'. Reflect this change in the FIT partition parser.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-04-20 15:23:02 +01:00
Chuanhong Guo
6fa50e26e7 kernel: mtk_bmt: skip bitflip check if threshold isn't set
kernel spi-nand driver leaves this field empty and let mtd set it later.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
2022-04-09 21:08:26 +08:00
Ansuel Smith
49d9d2b210 generic: fix compilation warning for ar8xxx swconfig
There are 2 warning for ar8xxx swconfig.
- Fix not used dev variable when ETHERNET_PACKET_MANGLE
  is not selected
- Convert fallthrough comment to compilation macro

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
2022-03-27 04:51:38 +01:00
Daniel Golle
30a5e07390 generic: 5.15: get uImage.FIT partition parser ready
Prepare uImage.FIT partition parser for Linux 5.15

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
2022-03-27 04:51:31 +01:00
Ansuel Smith
1f302afd73 generic: 5.15: rework hack patch
Rework hack patch in dir for kernel 5.15.
For the specific patch of packet mangeling introduce a new extra_priv_flags
as we don't have enough space to add additional flags in priv_flags.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
2022-03-27 00:07:34 +00:00
Felix Fietkau
62fd9f9709 kernel: mtdsplit: support UBI after FIT images
Change the partition name accordingly. Same behavior as mtdsplit_uimage

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
2a8a333ee9 kernel: mtk_bmt: add debugfs file to attempt repair of remapped sectors
This can be used for sectors that are not physically damaged

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
06382d1af7 kernel: add support for mediatek NMBM flash mapping support
This NAND flash remapping method is used on newer MediaTek devices with NAND
flash.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
be1f2b4d9d kernel: mtk_bmt: on error, do not attempt to remap out-of-range blocks
Pass errors to caller instead

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
7d1e2be160 kernel: mtk_bmt: fix block copying on remap with bmt v2
Copy from the previously mapped block (in case it was remapped already)

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
b4c7f8c5f7 kernel: mtk_bmt: allow get_mapping_block to return an error
Used by the mapping implementation to indicate that no backing block is
available

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Felix Fietkau
601c7b4adb kernel: split up mtk_bmt driver code
Keep a separate source file per variant

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-25 21:11:09 +01:00
Daniel Golle
d3a4607fc6 kernel: generic: fix warning in FIT partition parser
Use 'const char *' where necessary to make gcc get quiet.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-03-24 03:27:12 +00:00
Daniel Golle
ab143647ef kernel: generic: improve FIT partition parser
* only map filesystems configured in 'loadables'
 * allow mapping more than one filesystem (e.g. customization/branding
   or localization in addition to rootfs)
 * small cleaning here and there

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-03-24 00:46:45 +00:00
Daniel Golle
503f3b9f0e
kernel: generic: use chosen bootconf in FIT partition parser
If the selected boot configuration is stored by U-Boot in '/chosen'
node as 'bootconf' attribute, use that configuration to resolve the
block device used as rootfs. Fall back to use the default configuration
in case 'bootconf' is not present.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-03-21 23:48:09 +00:00
Felix Fietkau
e2aa04d1e5 kernel: mtk_bmt: add support for the bbt format used on mt7621
This does not have spare blocks for remapping, and it is also not suitable
for random write access. It only skips over bad blocks on linear writes of an
image to a partition. As such, it is really only suitable for the kernel
partition, or other partitions with mostly static data

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
ff6b4f2cfb kernel: mtk_bmt: add abstraction for supporting other formats
Preparation for supporting remapping on MT7621

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
7235c8d00c kernel: mtk_bmt: remap blocks after reaching bitflip threshold
This ensures that blocks are remapped before data becomes corrupt

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
0ddead0897 kernel: mtk_bmt: pass number of bitflips on read to the caller
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
b86452f841 kernel: mtk_bmt: add support for limiting range of remapping
This can be used to support ubi on top of mtk_bmt without reflashing the
boot loader. The boot loader + factory + kernel area is covered, while the
rest is passed through as-is

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
31b6cfb288 kernel: mtk_bmt: extend debug interface
Add support for showing remapped blocks and garbage collecting old
remapped blocks triggered by using the mark_good/mark_bad files

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
fde2421597 kernel: mtk_bmt: fix remapping after read/write failure
Copy from the previous block in order to preserve existing data

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Felix Fietkau
bcf91fe884 kernel: move mediatek BMT support patch to generic patches
Preparation for supporting BMT on MT7621. Move source files to the files/
subdirectory in order to simplify maintenance

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-01-13 18:33:06 +01:00
Denis Kalashnikov
2d19e6c6a4 generic: platform/mikrotik: use MTD notifier
If the SPI probe is sufficiently delayed, the routerboot driver may fail
to init as the routerboot partitions are not yet available.

Register an MTD user notifier instead of doing straight init so that the
init subroutines are only executed when the target MTD partitions are
present.

Because the init/exit routines can now be called outside of the kernel
normal init/exit calls, they cannot be jettisoned and must always be
available: the __init and __exit qualifiers are thus removed.

Reported-by: Denis Kalashnikov <denis281089@gmail.com>
Signed-off-by: Denis Kalashnikov <denis281089@gmail.com>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
[bump hardconfig/softconfig versions]
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2022-01-13 09:33:29 +01:00
Oskari Lemmela
6eb196ed0f generic: platform/mikrotik: make soft_config writable without 4K sectors
Make soft_config writable in all cases. Performing soft_config commit
will fail if mtd partition is not writable.

Signed-off-by: Oskari Lemmela <oskari@lemmela.net>
[bump rb_softconfig version number]
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2022-01-13 09:33:29 +01:00
Daniel Golle
f2c3875dfc
generic: deny write to uImage.FIT sub-image partitions
Set policy bit to force read-only mode on uImage.FIT filesystem
sub-images mapped as block partitions by the FIT partition parser.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-01-11 00:06:16 +00:00
Sergey Ryazanov
0b2c1d8b9a Move mvswitch 88E6060 driver to the ath25
ath25 requires a 88E6060 driver to support boards such as Fonera 2.0g
(FON2202). The swconfig based mvswitch driver has not yet been ported to
the 5.10 kernel as the only user is the ath25 target while all other
targets have been switched to the upstream DSA implementation.

Switching ath25 to the DSA implementation is a complex task, since we
need either per-board platform data or DTS support. ath25 lacks both of
them and builds only a single generic image. So we need to keep the
swconfig driver implementation to easly and quickly port ath25 to the
5.10 kernel.

Since porting the mvswitch driver to 5.10 as a generic driver is not an
option, and since the ath25 is its only user, make mvswitch a target
specific driver to be able to port it to the 5.10 kernel as part of the
kernel version update of the target. This will allow us quickly migrate
to the next kernel version and not delay the next firmware release.

Suggested-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
2021-12-27 16:00:21 +00:00
Rafał Miłecki
e4e410733f kernel: export switch_generic_set_link() symbol
This fixes:
ERROR: "switch_generic_set_link" [drivers/net/phy/b53/b53_common.ko] undefined!

At some point all packages for swconfig drivers were dropped and targets
were meant to have them built into kernels. It seems b53 (re-)gained its
kmod-switch-bcm53xx however and b53 needs to be built as module.

Fixes: b2cfed48f6 ("Revert "swconfig: fix Broadcom b53 support"")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
2021-10-07 15:13:16 +02:00
Rafał Miłecki
b2cfed48f6 Revert "swconfig: fix Broadcom b53 support"
This reverts commit 8f9cd1af0f.

That commit was meant to add a single EXPORT_SYMBOL_GPL() but it
actually also added few .of_match_table-s. One commit should handle one
thing and should not introduce unrelated changes.

Regarding actual changes:
1. EXPORT_SYMBOL_GPL is not required as we don't build swconfig drivers
   as modules.
2. PHY drivers must not have .of_match_table. That is allowed for MDIO
   drivers. This could work for some time (although is didn't for me on
   bcm53xx) but does not with kernel 5.10. It causes a soft lockup and
   upstream developers confirmed it's an unsupported design.

Link: https://lore.kernel.org/netdev/2b1dc053-8c9a-e3e4-b450-eecdfca3fe16@gmail.com/t/#mf80e472f35ee23f7a75cbf5b1e101a17ab3a64a3
Cc: Tobias Schramm <tobleminer@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
2021-10-07 11:30:55 +02:00
Daniel Golle
cf40141b51
kernel: properly handle paging errors in fit partition parser
The uImage.FIT partition uses page mapping without properly handling
paging errors. This can lead to Kernel Oops in case of read errors
while trying to parse uImage.FIT partitions.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-08-27 21:32:43 +01:00
Daniel Golle
8d633bf9f7 kernel: make uImage.FIT partition parser work on MBR partitions
Introduce new partition type 0x2e representing uImage.FIT and trigger
FIT partition parser on partitions having that type.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-07-20 04:11:05 +01:00
David Bauer
c5a8b85b72 kernel: ar8216: remove soft_reset
ar8xxx_soft_reset is effectively a NOP function. In the PHY state
machine, the availability and result of a soft_reset function
makes no difference for the code flow.

Thus, we can safely remove this method.

Signed-off-by: David Bauer <mail@david-bauer.net>
2021-06-03 00:00:55 +02:00
David Bauer
766e0f584a kernel: ar8216: add get_features method
Modifying PHY capabilities in the probe function broke with upstream
commit 92ed2eb7f4b7 ("net: phy: probe the PHY before determining the
supported features").

AR8316 switches only support 10/100 Mbit/s link modes because of this
change.

Provide a get_features method for the PHY driver, so Gigabit link mode
will be advertised to link partners again.

Signed-off-by: David Bauer <mail@david-bauer.net>
2021-06-03 00:00:46 +02:00
Thibaut VARÈNE
4e385a27d6 generic: platform/mikrotik: release mtd device after use
The code uses get_mtd_device_nm() which must be followed by a call to
put_mtd_device() once the handle is no longer used.

This fixes spurious shutdown console messages such as:
[ 2256.334562] Removing MTD device #7 (soft_config) with use count 1

Reported-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
2021-05-12 10:13:12 +02:00
Mathias Kresin
0806f8fc80 lantiq: add Linux 5.10 support as testing kernel
Following changes are made to the Lantiq kernel patches:

  0001-MIPS-lantiq-add-pcie-driver.patch
    The pci header isn't included by the of_pci header any longer

  0024-MIPS-lantiq-revert-DSA-switch-driver-PMU-clock-chang.patch
    Due to the merge of grx390 and ar10 clocks, extend support to grx390

  0025-NET-MIPS-lantiq-adds-xrx200-legacy.patch
    The do_carrier arguments was dropped from phy_link_change. The
    phylib has always sets the third parameter to true so the flag is
    always changed anyway.

    of_get_phy_mode() returns an error, or 0 on success, and pass a
    pointer, of type phy_interface_t, where the phy mode should be
    stored now. So far an error wasn't considered. Print at least an
    error message if something unexpected happens.

    The stuck queue is now passed to xrx200_tx_timeout (the timeout
    handler) but not used so far.

  0028-NET-lantiq-various-etop-fixes.patch
    ioremap has provided non-cached semantics by default since the Linux
    2.6 days and was removed with kernel version 5.6.

    of_get_phy_mode() returns an error, or 0 on success, and pass a
    pointer, of type phy_interface_t, where the phy mode should be
    stored now. So far an error wasn't considered. Print at least an
    error message if something unexpected happens.

  0042-arch-mips-increase-io_space_limit.patch
    Move IO space extension to laniq specific file

Signed-off-by: Mathias Kresin <dev@kresin.me>
2021-04-12 23:23:09 +02:00
Daniel Golle
2809d00007
kernel: support FIT partition parser on mtdblock devices
Allow using the FIT block-device partition partition parser to work on
top of mtdblock devices.
This is more tricky than it sounds as it requires to reorganize the
procedure of registering mtdblock devices in order to avoid locking
troubles caused by the block partition parsers then trying to open
the mtdblock device for reading while locks are still being held.
Fix that by moving the adding of the disks after the entire device
has been probed when locks no longer need to be held.
Also address issue with mtdsuper surfaced when using sub-partitions
which prevented mounting JFFS2 using the /dev/mtdblock* device.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2021-04-09 16:04:35 +01:00