[patch V4 22/31] mtd: use parity16 in sm_ftl

From: zengzhaoxiu
Date: Wed May 11 2016 - 05:23:09 EST


From: Zhaoxiu Zeng <zhaoxiu.zeng@xxxxxxxxx>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@xxxxxxxxx>
---
drivers/mtd/sm_ftl.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/sm_ftl.c b/drivers/mtd/sm_ftl.c
index b096f8b..345ff1a 100644
--- a/drivers/mtd/sm_ftl.c
+++ b/drivers/mtd/sm_ftl.c
@@ -136,7 +136,7 @@ static int sm_get_lba(uint8_t *lba)
return -2;

/* check parity - endianness doesn't matter */
- if (hweight16(*(uint16_t *)lba) & 1)
+ if (parity16(*(uint16_t *)lba))
return -2;

return (lba[1] >> 1) | ((lba[0] & 0x07) << 7);
@@ -183,8 +183,7 @@ static void sm_write_lba(struct sm_oob *oob, uint16_t lba)
tmp[0] = 0x10 | ((lba >> 7) & 0x07);
tmp[1] = (lba << 1) & 0xFF;

- if (hweight16(*(uint16_t *)tmp) & 0x01)
- tmp[1] |= 1;
+ tmp[1] |= parity16(*(uint16_t *)tmp);

oob->lba_copy1[0] = oob->lba_copy2[0] = tmp[0];
oob->lba_copy1[1] = oob->lba_copy2[1] = tmp[1];
--
2.7.4