diff options
Diffstat (limited to 'lib/zlib_dfltcc/dfltcc_inflate.c')
| -rw-r--r-- | lib/zlib_dfltcc/dfltcc_inflate.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/lib/zlib_dfltcc/dfltcc_inflate.c b/lib/zlib_dfltcc/dfltcc_inflate.c index fb60b5a6a1cb..437cd34c8490 100644 --- a/lib/zlib_dfltcc/dfltcc_inflate.c +++ b/lib/zlib_dfltcc/dfltcc_inflate.c @@ -2,7 +2,7 @@ #include "../zlib_inflate/inflate.h" #include "dfltcc_util.h" -#include "dfltcc.h" +#include "dfltcc_inflate.h" #include <asm/setup.h> #include <linux/export.h> #include <linux/zutil.h> @@ -22,16 +22,20 @@ int dfltcc_can_inflate( zlib_dfltcc_support == ZLIB_DFLTCC_DEFLATE_ONLY) return 0; - /* Unsupported compression settings */ - if (state->wbits != HB_BITS) - return 0; - /* Unsupported hardware */ return is_bit_set(dfltcc_state->af.fns, DFLTCC_XPND) && is_bit_set(dfltcc_state->af.fmts, DFLTCC_FMT0); } EXPORT_SYMBOL(dfltcc_can_inflate); +void dfltcc_reset_inflate_state(z_streamp strm) { + struct inflate_state *state = (struct inflate_state *)strm->state; + struct dfltcc_state *dfltcc_state = GET_DFLTCC_STATE(state); + + dfltcc_reset_state(dfltcc_state); +} +EXPORT_SYMBOL(dfltcc_reset_inflate_state); + static int dfltcc_was_inflate_used( z_streamp strm ) @@ -91,8 +95,10 @@ dfltcc_inflate_action dfltcc_inflate( struct dfltcc_param_v0 *param = &dfltcc_state->param; dfltcc_cc cc; - if (flush == Z_BLOCK) { - /* DFLTCC does not support stopping on block boundaries */ + if (flush == Z_BLOCK || flush == Z_PACKET_FLUSH) { + /* DFLTCC does not support stopping on block boundaries (Z_BLOCK flush option) + * as well as the use of Z_PACKET_FLUSH option (used exclusively by PPP driver) + */ if (dfltcc_inflate_disable(strm)) { *ret = Z_STREAM_ERROR; return DFLTCC_INFLATE_BREAK; @@ -121,8 +127,6 @@ dfltcc_inflate_action dfltcc_inflate( /* Translate stream to parameter block */ param->cvt = CVT_ADLER32; param->sbb = state->bits; - param->hl = state->whave; /* Software and hardware history formats match */ - param->ho = (state->write - state->whave) & ((1 << HB_BITS) - 1); if (param->hl) param->nt = 0; /* Honor history for the first block */ param->cv = state->check; @@ -136,8 +140,6 @@ dfltcc_inflate_action dfltcc_inflate( strm->msg = oesc_msg(dfltcc_state->msg, param->oesc); state->last = cc == DFLTCC_CC_OK; state->bits = param->sbb; - state->whave = param->hl; - state->write = (param->ho + param->hl) & ((1 << HB_BITS) - 1); state->check = param->cv; if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0) { /* Report an error if stream is corrupted */ |