Hannu Nyman wrote in openwrt's github issue #9962:
|Based on forum discussion, the commit 0bc794a
|"kernel: add support for Toshiba TC58NVG0S3HTA00 NAND flash"
|causes flash memory chip misdetection for some other
|Fritzbox devices, as the commit only defines a 4-byte flash
|memory chip ID that matches several chips used in the devices.
|
|See discussion from this onward
|<https://forum.openwrt.org/t/openwrt-22-03-0-rc1-first-release-candidate/126045/182>
|
|OpenWrt 22.03.0-rc2 and rc3 are causing on a Fritzbox 7412
|bootloops due to a misdetected flash chip.
|
|Yup, that patch is missing the 5th ID byte entirely - both chips
|share the same first 4;
|
| TC58NVG0S3HTA00 = 0x98 0xf1 0x80 0x15 0x72 (digikey datasheet, page 35)
| TC58BVG0S3HTA00 = 0x98 0xf1 0x80 0x15 0xf2 (digikey datasheet, page 28)
|
|The commit has also been backported to openwrt-22.03 after rc1,
|so both rc2 and rc3 suffer from this bug."
Andreas' TC58NVG0S3H seems not to follow Toshibas/Kioxa's own datasheet.
It only reports the first four bytes: "98 f1 80 15 00 00 00 00".
This patch changes the id_len in the entry to 8. This makes it so that
Andreas' NAND is still detected. At the same time, this prevents other
Toshiba NAND flash chips - that share the same four bytes - from being
misdetected.
The issue has been reported upstream, since they also accepted the initial
patch... so if not addressed, 5.19/5.20 will also break those affected
devices again.
Reported-by: Peter-vdL
Fixes: 0bc794a668 ("kernel: add support for Toshiba TC58NVG0S3HTA00 NAND flash")
Link: <https://github.com/openwrt/openwrt/issues/9962>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
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