From 5b58770673a9c16466814a93176e4c71d8e9c81b Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Thu, 29 Jan 2015 16:33:11 +0800 Subject: MLK-10178-10 mtd:nand:mxs fix potential dcache issue DCIMVAC is upgraded to DCCIMVAC for the individual processor (Cortex-A7) that the DCIMVAC is executed on. We should follow the linux dma follow. Before DMA read, first invalidate dcache then after DMA read, invalidate dcache again. Signed-off-by: Peng Fan (cherry picked from commit dddb52ebdc6c4919da0103a364563dbe2c100874) --- drivers/mtd/nand/mxs_nand.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/mxs_nand.c b/drivers/mtd/nand/mxs_nand.c index 5a7ef6b563..077986644b 100644 --- a/drivers/mtd/nand/mxs_nand.c +++ b/drivers/mtd/nand/mxs_nand.c @@ -7,7 +7,7 @@ * Based on code from LTIB: * Freescale GPMI NFC NAND Flash Driver * - * Copyright (C) 2010-2014 Freescale Semiconductor, Inc. + * Copyright (C) 2010-2015 Freescale Semiconductor, Inc. * Copyright (C) 2008 Embedded Alley Solutions, Inc. * * SPDX-License-Identifier: GPL-2.0+ @@ -456,6 +456,9 @@ static void mxs_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int length) mxs_dma_desc_append(channel, d); + /* Invalidate caches */ + mxs_nand_inval_data_buf(nand_info); + /* Execute the DMA chain. */ ret = mxs_dma_go(channel); if (ret) { @@ -622,6 +625,9 @@ static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand, mxs_dma_desc_append(channel, d); + /* Invalidate caches */ + mxs_nand_inval_data_buf(nand_info); + /* Execute the DMA chain. */ ret = mxs_dma_go(channel); if (ret) { -- cgit v1.2.3