mtd: spinand: fix direct mapping creation sizes

Continuous mode is only supported for data reads, thus writing
requires only single flash page mapping.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

Author: mkshevetskiy

drivers/mtd/nand/spi/core.c

@@ -1097,18 +1097,13 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 				 unsigned int plane)
 {
 	struct nand_device *nand = spinand_to_nand(spinand);
-	struct spi_mem_dirmap_info info = {
-		.length = nanddev_page_size(nand) +
-			  nanddev_per_page_oobsize(nand),
-	};
+	struct spi_mem_dirmap_info info = { 0 };
 	struct spi_mem_dirmap_desc *desc;
 
-	if (spinand->cont_read_possible)
-		info.length = nanddev_eraseblock_size(nand);
-
 	/* The plane number is passed in MSB just above the column address */
 	info.offset = plane << fls(nand->memorg.pagesize);
 
+	info.length = nanddev_page_size(nand) + nanddev_per_page_oobsize(nand);
 	info.op_tmpl = *spinand->op_templates.update_cache;
 	desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
 					  spinand->spimem, &info);
@@ -1117,6 +1112,8 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 
 	spinand->dirmaps[plane].wdesc = desc;
 
+	if (spinand->cont_read_possible)
+		info.length = nanddev_eraseblock_size(nand);
 	info.op_tmpl = *spinand->op_templates.read_cache;
 	desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
 					  spinand->spimem, &info);
@@ -1132,6 +1129,7 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 		return 0;
 	}
 
+	info.length = nanddev_page_size(nand) + nanddev_per_page_oobsize(nand);
 	info.op_tmpl = *spinand->op_templates.update_cache;
 	info.op_tmpl.data.ecc = true;
 	desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,
@@ -1141,6 +1139,8 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 
 	spinand->dirmaps[plane].wdesc_ecc = desc;
 
+	if (spinand->cont_read_possible)
+		info.length = nanddev_eraseblock_size(nand);
 	info.op_tmpl = *spinand->op_templates.read_cache;
 	info.op_tmpl.data.ecc = true;
 	desc = devm_spi_mem_dirmap_create(&spinand->spimem->spi->dev,