From: Mark Ware Date: Thu, 27 May 2010 01:45:39 +0000 (+1000) Subject: mtd: doc2000: fix uninitialized variable in doc_ecc_decode() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c9fb67735b307a3cdf57e568b6c50c860248d1d3;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: David Woodhouse --- diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index 47067bc98248..51315f55f905 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -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 */