From: Xiaolei Li Date: Fri, 23 Jun 2017 07:12:24 +0000 (+0800) Subject: mtd: nand: mtk: fix incorrect register setting order about ecc irq X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=188986c70e09f0f3cd88e6fe14c89e439474e3ec;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git mtd: nand: mtk: fix incorrect register setting order about ecc irq Currently, we trigger ECC HW before setting ecc irq. It is incorrect. Because ECC starts working once the register ECC_CTL_REG is set as ECC_OP_ENABLE. And this may lead an abnormal behavior of ecc irq. So, should enable ecc irq at first, then trigger ECC. Fixes: 1d6b1e464950 ("mtd: mediatek: driver for MTK Smart Device") Signed-off-by: Xiaolei Li Signed-off-by: Boris Brezillon --- diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c index 4958121cb827..a855a4e5cc35 100644 --- a/drivers/mtd/nand/mtk_ecc.c +++ b/drivers/mtd/nand/mtk_ecc.c @@ -276,8 +276,6 @@ int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config) if (ret) return ret; - writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op)); - init_completion(&ecc->done); reg_val = ECC_IRQ_EN; /* @@ -289,6 +287,8 @@ int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config) reg_val |= ECC_PG_IRQ_SEL; writew(reg_val, ecc->regs + ECC_IRQ_REG(op)); + writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op)); + return 0; } EXPORT_SYMBOL(mtk_ecc_enable);