diff options
Diffstat (limited to 'lib/reed_solomon/decode_rs.c')
| -rw-r--r-- | lib/reed_solomon/decode_rs.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/lib/reed_solomon/decode_rs.c b/lib/reed_solomon/decode_rs.c index 0ec3f257ffdf9..1db74eb098d0e 100644 --- a/lib/reed_solomon/decode_rs.c +++ b/lib/reed_solomon/decode_rs.c @@ -1,22 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 /* - * lib/reed_solomon/decode_rs.c - * - * Overview: - * Generic Reed Solomon encoder / decoder library + * Generic Reed Solomon encoder / decoder library * * Copyright 2002, Phil Karn, KA9Q * May be used under the terms of the GNU General Public License (GPL) * * Adaption to the kernel by Thomas Gleixner (tglx@linutronix.de) * - * $Id: decode_rs.c,v 1.7 2005/11/07 11:14:59 gleixner Exp $ - * - */ - -/* Generic data width independent code which is included by the - * wrappers. + * Generic data width independent code which is included by the wrappers. */ { + struct rs_codec *rs = rsc->codec; int deg_lambda, el, deg_omega; int i, j, r, k, pad; int nn = rs->nn; @@ -27,16 +21,22 @@ uint16_t *alpha_to = rs->alpha_to; uint16_t *index_of = rs->index_of; uint16_t u, q, tmp, num1, num2, den, discr_r, syn_error; - /* Err+Eras Locator poly and syndrome poly The maximum value - * of nroots is 8. So the necessary stack size will be about - * 220 bytes max. - */ - uint16_t lambda[nroots + 1], syn[nroots]; - uint16_t b[nroots + 1], t[nroots + 1], omega[nroots + 1]; - uint16_t root[nroots], reg[nroots + 1], loc[nroots]; int count = 0; uint16_t msk = (uint16_t) rs->nn; + /* + * The decoder buffers are in the rs control struct. They are + * arrays sized [nroots + 1] + */ + uint16_t *lambda = rsc->buffers + RS_DECODE_LAMBDA * (nroots + 1); + uint16_t *syn = rsc->buffers + RS_DECODE_SYN * (nroots + 1); + uint16_t *b = rsc->buffers + RS_DECODE_B * (nroots + 1); + uint16_t *t = rsc->buffers + RS_DECODE_T * (nroots + 1); + uint16_t *omega = rsc->buffers + RS_DECODE_OMEGA * (nroots + 1); + uint16_t *root = rsc->buffers + RS_DECODE_ROOT * (nroots + 1); + uint16_t *reg = rsc->buffers + RS_DECODE_REG * (nroots + 1); + uint16_t *loc = rsc->buffers + RS_DECODE_LOC * (nroots + 1); + /* Check length parameter for validity */ pad = nn - nroots - len; BUG_ON(pad < 0 || pad >= nn); |