linux-kernel - [PATCH 1/4] drivers: mtd: spi-nand: fix direct mapping creation sizes.

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Message-ID: <20250804192132.1406387-2-mikhail.kshevetskiy@iopsys.eu>
Date: Mon,  4 Aug 2025 22:21:29 +0300
From: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
To: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Ray Liu <ray.liu@...oha.com>,
	Mark Brown <broonie@...nel.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Martin Kurbanov <mmkurbanov@...utedevices.com>,
	Takahiro Kuwano <Takahiro.Kuwano@...ineon.com>,
	Cheng Ming Lin <chengminglin@...c.com.tw>,
	linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-spi@...r.kernel.org
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
Subject: [PATCH 1/4] drivers: mtd: spi-nand: fix direct mapping creation sizes.

Continuous mode is only supported for non-raw data reads, thus raw I/O
or non-raw writing requires only single flash page mapping.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@...sys.eu>
---
 drivers/mtd/nand/spi/core.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c
index b0898990b2a5..b42c42ec58a4 100644
--- a/drivers/mtd/nand/spi/core.c
+++ b/drivers/mtd/nand/spi/core.c
@@ -1103,9 +1103,6 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 	};
 	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);
 
@@ -1117,6 +1114,8 @@ 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 +1131,9 @@ static int spinand_create_dirmap(struct spinand_device *spinand,
 		return 0;
 	}
 
+	// ECC reading/writing always happen in non-continuous mode
+	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,
-- 
2.47.2