linux-kernel - [RFC 15/47] mtd: nand: stm_nand_bch: add compatible page size check

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Message-Id: <1395735604-26706-16-git-send-email-lee.jones@linaro.org>
Date:	Tue, 25 Mar 2014 08:19:32 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	lee.jones@...aro.org, kernel@...inux.com,
	computersforpeace@...il.com, linux-mtd@...ts.infradead.org,
	dwmw2@...radead.org, angus.clark@...com, pekon@...com
Subject: [RFC 15/47] mtd: nand: stm_nand_bch: add compatible page size check

Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/mtd/nand/stm_nand_bch.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index fbcd1b9..93fe835 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -29,6 +29,9 @@
 #include "stm_nand_regs.h"
 #include "stm_nand_dt.h"
 
+/* NANDi BCH Controller properties */
+#define NANDI_BCH_SECTOR_SIZE			1024
+
 /* Bad Block Table (BBT) */
 struct nandi_bbt_info {
 	uint32_t	bbt_size;		/* Size of bad-block table */
@@ -774,6 +777,12 @@ static int stm_nand_bch_probe(struct platform_device *pdev)
 		dev_warn(&pdev->dev, "No timing data available\n");
 	}
 
+	if (mtd->writesize < NANDI_BCH_SECTOR_SIZE) {
+		dev_err(nandi->dev,
+			"page size incompatible with BCH ECC sector\n");
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
-- 
1.8.3.2

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