The bug was obswerved while reading code. There are not many users of addr_mode_nbytes. Anyway, we should update the flash's current address mode when changing the address mode, fix it. We don't care for now about the set_4byte_addr_mode(nor, false) from spi_nor_restore(), as it is used at driver remove and shutdown.

Cc: stable@vger.kernel.org Fixes: d7931a215063 ("mtd: spi-nor: core: Track flash's internal address mode") Signed-off-by: Tudor Ambarus tudor.ambarus@linaro.org --- drivers/mtd/spi-nor/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 1cf566fed9c6..868414017399 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2769,6 +2769,7 @@ static int spi_nor_quad_enable(struct spi_nor *nor)

static int spi_nor_init(struct spi_nor *nor) { + struct spi_nor_flash_parameter *params = nor->params; int err;

err = spi_nor_octal_dtr_enable(nor, true); @@ -2810,9 +2811,10 @@ static int spi_nor_init(struct spi_nor *nor) */ WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET, "enabling reset hack; may not recover from unexpected reboots\n"); - err = nor->params->set_4byte_addr_mode(nor, true); + err = params->set_4byte_addr_mode(nor, true); if (err && err != -ENOTSUPP) return err; + params->addr_mode_nbytes = 4; }

return 0;