linux-kernel - [PATCH] mtd: nand: sunxi: Add randomizer configuration before randomizer enable

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Message-ID: <20250519154225.2928-1-vulab@iscas.ac.cn>
Date: Mon, 19 May 2025 23:42:24 +0800
From: Wentao Liang <vulab@...as.ac.cn>
To: miquel.raynal@...tlin.com,
	richard@....at,
	vigneshr@...com,
	wens@...e.org,
	jernej.skrabec@...il.com,
	samuel@...lland.org,
	ruanjinjie@...wei.com,
	u.kleine-koenig@...libre.com
Cc: linux-mtd@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Wentao Liang <vulab@...as.ac.cn>,
	stable@...r.kernel.org
Subject: [PATCH] mtd: nand: sunxi: Add randomizer configuration before randomizer enable

In sunxi_nfc_hw_ecc_read_chunk(), the sunxi_nfc_randomizer_enable() is
called without the config of randomizer. A proper implementation can be
found in sunxi_nfc_hw_ecc_read_chunks_dma().

Add sunxi_nfc_randomizer_config() before the start of randomization.

Fixes: 4be4e03efc7f ("mtd: nand: sunxi: add randomizer support")
Cc: stable@...r.kernel.org # v4.6
Signed-off-by: Wentao Liang <vulab@...as.ac.cn>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index fab371e3e9b7..9179719f639e 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -817,6 +817,7 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct nand_chip *nand,
 	if (ret)
 		return ret;
 
+	sunxi_nfc_randomizer_config(nand, page, false);
 	sunxi_nfc_randomizer_enable(nand);
 	writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP,
 	       nfc->regs + NFC_REG_CMD);
-- 
2.42.0.windows.2