mtd: spi-nor: Reset nor->addr_width when SFDP parsing failed

Commit 5390a8df769e ("mtd: spi-nor: add support to non-uniform SFDP SPI
NOR flash memories") removed the 'nor->addr_width = 0;' statement when
spi_nor_parse_sfdp() returns an error, thus leaving ->addr_width in an
undefined state which can cause trouble when spi_nor_scan() checks its
value.

Reported-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Fixes: 5390a8df769e ("mtd: spi-nor: add support to non-uniform SFDP SPI NOR flash memories")
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 9407ca5..3e54e31 100644 (file)
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -3250,12 +3250,14 @@ static int spi_nor_init_params(struct spi_nor *nor,
                memcpy(&sfdp_params, params, sizeof(sfdp_params));
                memcpy(&prev_map, &nor->erase_map, sizeof(prev_map));
 
-               if (spi_nor_parse_sfdp(nor, &sfdp_params))
+               if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
+                       nor->addr_width = 0;
                        /* restore previous erase map */
                        memcpy(&nor->erase_map, &prev_map,
                               sizeof(nor->erase_map));
-               else
+               } else {
                        memcpy(params, &sfdp_params, sizeof(*params));
+               }
        }
 
        return 0;