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Subject[PATCH 21/31] mtd: use parity16 in ssfdc.c
From
Date
From: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>

Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>
---
drivers/mtd/ssfdc.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c
index daf82ba..b4d9144 100644
--- a/drivers/mtd/ssfdc.c
+++ b/drivers/mtd/ssfdc.c
@@ -182,24 +182,10 @@ static int read_raw_oob(struct mtd_info *mtd, loff_t offs, uint8_t *buf)
return 0;
}

-/* Parity calculator on a word of n bit size */
-static int get_parity(int number, int size)
-{
- int k;
- int parity;
-
- parity = 1;
- for (k = 0; k < size; k++) {
- parity += (number >> k);
- parity &= 1;
- }
- return parity;
-}
-
/* Read and validate the logical block address field stored in the OOB */
static int get_logical_address(uint8_t *oob_buf)
{
- int block_address, parity;
+ int block_address;
int offset[2] = {6, 11}; /* offset of the 2 address fields within OOB */
int j;
int ok = 0;
@@ -215,11 +201,9 @@ static int get_logical_address(uint8_t *oob_buf)

/* Check for the signature bits in the address field (MSBits) */
if ((block_address & ~0x7FF) == 0x1000) {
- parity = block_address & 0x01;
block_address &= 0x7FF;
- block_address >>= 1;

- if (get_parity(block_address, 10) != parity) {
+ if (!parity16(block_address)) {
pr_debug("SSFDC_RO: logical address field%d"
"parity error(0x%04X)\n", j+1,
block_address);
--
2.5.5
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