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

Commit 5390a8d ("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: 5390a8d ("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>

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;