From f953f0f89663c39f08f4baaa8a4a881401b65654 Mon Sep 17 00:00:00 2001 From: Kamal Dasu Date: Mon, 8 Jan 2018 15:36:48 -0500 Subject: mtd: nand: brcmnand: Disable prefetch by default Brcm nand controller prefetch feature needs to be disabled by default. Enabling affects performance on random reads as well as dma reads. Signed-off-by: Kamal Dasu Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller") Cc: Acked-by: Florian Fainelli Signed-off-by: Boris Brezillon --- drivers/mtd/nand/brcmnand/brcmnand.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c index e0797abb1ebd..b81ddbaae149 100644 --- a/drivers/mtd/nand/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/brcmnand/brcmnand.c @@ -2200,16 +2200,9 @@ static int brcmnand_setup_dev(struct brcmnand_host *host) if (ctrl->nand_version >= 0x0702) tmp |= ACC_CONTROL_RD_ERASED; tmp &= ~ACC_CONTROL_FAST_PGM_RDIN; - if (ctrl->features & BRCMNAND_HAS_PREFETCH) { - /* - * FIXME: Flash DMA + prefetch may see spurious erased-page ECC - * errors - */ - if (has_flash_dma(ctrl)) - tmp &= ~ACC_CONTROL_PREFETCH; - else - tmp |= ACC_CONTROL_PREFETCH; - } + if (ctrl->features & BRCMNAND_HAS_PREFETCH) + tmp &= ~ACC_CONTROL_PREFETCH; + nand_writereg(ctrl, offs, tmp); return 0; -- cgit v1.2.3-59-g8ed1b