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Blackfin: nand: flush peripheral before polling it

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We need to make sure the data written to the nand flash controller makes
it there before we start polling its status register.  Otherwise, we may
get stale data and return before the controller is actually ready.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Graf Yang 2009-04-04 07:45:57 -04:00 committed by Mike Frysinger
parent d04371a116
commit a343ba87ea
1 changed files with 1 additions and 0 deletions
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drivers/mtd/nand/bfin_nand.c
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@ -98,6 +98,7 @@ static void bfin_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
/* Contents do not matter */
bfin_write_NFC_DATA_RD(0x0000);
SSYNC();
while (!(bfin_read_NFC_IRQSTAT() & RD_RDY))
if (ctrlc())