From 8f6456565a140ea1d0fc85a56663d8437e303cdf Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Wed, 24 Jan 2018 23:49:31 +0100 Subject: mtd: nand: sunxi: Fix ECC strength choice commit f4c6cd1a7f2275d5bc0e494b21fff26f8dde80f0 upstream. When the requested ECC strength does not exactly match the strengths supported by the ECC engine, the driver is selecting the closest strength meeting the 'selected_strength > requested_strength' constraint. Fix the fact that, in this particular case, ecc->strength value was not updated to match the 'selected_strength'. For instance, one can encounter this issue when no ECC requirement is filled in the device tree while the NAND chip minimum requirement is not a strength/step_size combo natively supported by the ECC engine. Fixes: 1fef62c1423b ("mtd: nand: add sunxi NAND flash controller support") Suggested-by: Boris Brezillon Signed-off-by: Miquel Raynal Signed-off-by: Boris Brezillon Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/nand/sunxi_nand.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c index 824711845c44..3bb9b34d9e77 100644 --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -1046,8 +1046,14 @@ static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd, /* Add ECC info retrieval from DT */ for (i = 0; i < ARRAY_SIZE(strengths); i++) { - if (ecc->strength <= strengths[i]) + if (ecc->strength <= strengths[i]) { + /* + * Update ecc->strength value with the actual strength + * that will be used by the ECC engine. + */ + ecc->strength = strengths[i]; break; + } } if (i >= ARRAY_SIZE(strengths)) { -- cgit v1.2.3