From 324f78dfb442b82365548b657ec4e6974c677502 Mon Sep 17 00:00:00 2001 From: Bert Vermeulen Date: Tue, 6 Oct 2020 15:23:46 +0200 Subject: [PATCH] mtd: spi-nor: Fix address width on flash chips > 16MB MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit If a flash chip has more than 16MB capacity but its BFPT reports BFPT_DWORD1_ADDRESS_BYTES_3_OR_4, the spi-nor framework defaults to 3. The check in spi_nor_set_addr_width() doesn't catch it because addr_width did get set. This fixes that check. Fixes: f9acd7fa80be ("mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths") Signed-off-by: Bert Vermeulen Signed-off-by: Vignesh Raghavendra Reviewed-by: Tudor Ambarus Reviewed-by: Pratyush Yadav Reviewed-by: Joel Stanley Reviewed-by: Cédric Le Goater Tested-by: Joel Stanley Tested-by: Cédric Le Goater Link: https://lore.kernel.org/r/20201006132346.12652-1-bert@biot.com --- drivers/mtd/spi-nor/core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index b37d6c1..f0ae7a0 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -3008,13 +3008,15 @@ static int spi_nor_set_addr_width(struct spi_nor *nor) /* already configured from SFDP */ } else if (nor->info->addr_width) { nor->addr_width = nor->info->addr_width; - } else if (nor->mtd.size > 0x1000000) { - /* enable 4-byte addressing if the device exceeds 16MiB */ - nor->addr_width = 4; } else { nor->addr_width = 3; } + if (nor->addr_width == 3 && nor->mtd.size > 0x1000000) { + /* enable 4-byte addressing if the device exceeds 16MiB */ + nor->addr_width = 4; + } + if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) { dev_dbg(nor->dev, "address width is too large: %u\n", nor->addr_width); -- 2.7.4