[PATCH 4/7] mtd: Blackfin NFC: wait for the ECC reset to finish

[Mike Frysinger]

From: Barry Song <barry.song at analog.com>

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 <barry.song at analog.com>
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
 drivers/mtd/nand/bf5xx_nand.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c
index b553705..949f656 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);
-- 
1.7.2