mtd: nand: pxa3xx_nand: fix early spurious interrupt

When the nand is first probe, and upon the first command start, the
status bits should be cleared before the interrupts are unmasked.

This commit is taken from Linux:
'commit 0b14392db2e'
("mtd: nand: pxa3xx_nand: fix early spurious interrupt")

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Ofer Heifetz <oferh@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 8e450fb91ad0acf1a1e4325649faa4df55860925..7b1dcb24eee63be03df3d068019fa08fc5fb54bc 100644 (file)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -481,8 +481,8 @@ static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
        ndcr |= NDCR_ND_RUN;
 
        /* clear status bits and run */
-       nand_writel(info, NDCR, 0);
        nand_writel(info, NDSR, NDSR_MASK);
+       nand_writel(info, NDCR, 0);
        nand_writel(info, NDCR, ndcr);
 }