From: Alexander Sverdlin alexander.sverdlin@nokia.com
commit 2ebc336be08160debfe27f87660cf550d710f3e9 upstream.
Erase can be zeroed in spi_nor_parse_4bait() or spi_nor_init_non_uniform_erase_map(). In practice it happened with mt25qu256a, which supports 4K, 32K, 64K erases with 3b address commands, but only 4K and 64K erase with 4b address commands.
Fixes: dc92843159a7 ("mtd: spi-nor: fix erase_type array to indicate current map conf") Signed-off-by: Alexander Sverdlin alexander.sverdlin@nokia.com Signed-off-by: Tudor Ambarus tudor.ambarus@microchip.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20211119081412.29732-1-alexander.sverdlin@nokia.co... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mtd/spi-nor/core.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -1220,6 +1220,8 @@ spi_nor_find_best_erase_type(const struc continue;
erase = &map->erase_type[i]; + if (!erase->size) + continue;
/* Alignment is not mandatory for overlaid regions */ if (region->offset & SNOR_OVERLAID_REGION &&