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mtd: doc2000: fix uninitialized variable in doc_ecc_decode() 

The variable 'syn' was being used uninitialized.  Also
fixed incorrect use of syn[] vs s[].

Tested on powerpc board with 64MiB DOC2000.

Signed-off-by: Mark Ware <mware@elphinstone.net>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Mark Ware 2010-05-27 11:45:39 +10:00 committed by David Woodhouse
parent 7b0507eb69
commit c9fb67735b
1 changed files with 3 additions and 2 deletions
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5
drivers/mtd/nand/diskonchip.c
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@ -146,6 +146,7 @@ static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc)
uint8_t parity;
uint16_t ds[4], s[5], tmp, errval[8], syn[4];
memset(syn, 0, sizeof(syn));
/* Convert the ecc bytes into words */
ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8);
ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6);
@ -169,9 +170,9 @@ static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc)
s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)];
}
/* Calc s[i] = s[i] / alpha^(v + i) */
/* Calc syn[i] = s[i] / alpha^(v + i) */
for (i = 0; i < NROOTS; i++) {
if (syn[i])
if (s[i])
syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i));
}
/* Call the decoder library */