On Sat, Mar 30, 2024 at 02:49:56PM +0100, Hauke Mehrtens wrote: > Hi, > > Please backport the following commit back to the Linux stable kernels 6.6, > 6.7 and 6.8: > > commit 34a956739d295de6010cdaafeed698ccbba87ea4 > Author: Ezra Buehler <ezra.buehler@xxxxxxxxxxxxxxxxxx> > Date: Thu Jan 25 22:01:07 2024 +0200 > > mtd: spinand: Add support for 5-byte IDs > > E.g. ESMT chips will return an identification code with a length of 5 > bytes. In order to prevent ambiguity, flash chips would actually need to > return IDs that are up to 17 or more bytes long due to JEDEC's > continuation scheme. I understand that if a manufacturer ID is located > in bank N of JEDEC's database (there are currently 16 banks), N - 1 > continuation codes (7Fh) need to be added to the identification code > (comprising of manufacturer ID and device ID). However, most flash chip > manufacturers don't seem to implement this (correctly). > > Signed-off-by: Ezra Buehler <ezra.buehler@xxxxxxxxxxxxxxxxxx> > Reviewed-by: Martin Kurbanov <mmkurbanov@xxxxxxxxxxxxxxxxx> > Tested-by: Martin Kurbanov <mmkurbanov@xxxxxxxxxxxxxxxxx> > Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> > Link: > https://lore.kernel.org/linux-mtd/20240125200108.24374-2-ezra@xxxxxxxx > > > This will fix a regression introduced between Linux kernel 6.6.22 and 6.6.23 > in OpenWrt. The esmt NAND flash is not detected any more: > <3>[ 0.885607] spi-nand spi0.0: unknown raw ID c8017f7f > <4>[ 0.890852] spi-nand: probe of spi0.0 failed with error -524 > See: https://github.com/openwrt/openwrt/pull/14992 > > > The following commit was backported to 6.6.22, but the commit it depends on > was not backported. > commit 4bd14b2fd8a83a2f5220ba4ef323f741e11bfdfd > Author: Ezra Buehler <ezra.buehler@xxxxxxxxxxxxxxxxxx> > Date: Thu Jan 25 22:01:08 2024 +0200 > > mtd: spinand: esmt: Extend IDs to 5 bytes Now queued up, thanks. greg k-h
