From: Bert Vermeulen <bert@xxxxxxxx>
[ Upstream commit 324f78dfb442b82365548b657ec4e6974c677502 ]
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 <bert@xxxxxxxx>
Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx>
Reviewed-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
Reviewed-by: Pratyush Yadav <p.yadav@xxxxxx>
Reviewed-by: Joel Stanley <joel@xxxxxxxxx>
Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>
Tested-by: Joel Stanley <joel@xxxxxxxxx>
Tested-by: Cédric Le Goater <clg@xxxxxxxx>
Link: https://lore.kernel.org/r/20201006132346.12652-1-bert@xxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 b37d6c1936de1..f0ae7a01703a1 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);
--
2.27.0
