From 752b957a37ee1cc09fccb39a8bc5843edf32119b Mon Sep 17 00:00:00 2001 From: Barry Song Date: Thu, 5 Aug 2010 11:07:41 -0400 Subject: [PATCH] mtd: Blackfin NFC: wait for the ECC reset to finish When resetting the ECC registers/counters, the bit will automatically clear itself once the reset has actually finished. So make sure we wait for that to occur before doing anything else rather than assuming everything is peachy and proceeding with stale ECC values. Signed-off-by: Barry Song Signed-off-by: Mike Frysinger Signed-off-by: David Woodhouse --- drivers/mtd/nand/bf5xx_nand.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c index d48cc39afc21..8070ff359a41 100644 --- a/drivers/mtd/nand/bf5xx_nand.c +++ b/drivers/mtd/nand/bf5xx_nand.c @@ -507,6 +507,8 @@ static void bf5xx_nand_dma_rw(struct mtd_info *mtd, */ bfin_write_NFC_RST(ECC_RST); SSYNC(); + while (bfin_read_NFC_RST() & ECC_RST) + cpu_relax(); disable_dma(CH_NFC); clear_dma_irqstat(CH_NFC);