As pointed out by this bug report [1], buffered writes are now broken on S29GL064N. This issue comes from a rework which switched from using chip_good() to chip_ready(), because DQ true data 0xFF is read on S29GL064N and an error returned by chip_good(). One way to solve the issue is to revert the change partially to use chip_ready for S29GL064N. [1] https://lore.kernel.org/r/b687c259-6413-26c9-d4c9-b3afa69ea124@xxxxxxxxxxxxxx/ Fixes: dfeae1073583("mtd: cfi_cmdset_0002: Change write buffer to check correct value") Signed-off-by: Tokunori Ikegami <ikegami.t@xxxxxxxxx> Tested-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Tokunori Ikegami (3): mtd: cfi_cmdset_0002: Move and rename chip_check/chip_ready/chip_good_for_write mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N mtd: cfi_cmdset_0002: Add S29GL064N ID definition drivers/mtd/chips/cfi_cmdset_0002.c | 93 +++++++++++++++-------------- 1 file changed, 49 insertions(+), 44 deletions(-) -- 2.32.0
