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Fix ppp_deflate issues with recent zlib_inflate changes

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The last zlib_inflate update broke certain corner cases for ppp_deflate
decompression handling.  This patch fixes some logic to make things work
properly again.  Users other than ppp_deflate (the only Z_PACKET_FLUSH
user) should be unaffected.

Fixes bug 8405 (confirmed by Stefan)

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: Stefan Wenk <stefan.wenk@gmx.at>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Purdie 2007-05-06 14:51:56 -07:00 committed by Linus Torvalds
parent c24228daa1
commit f0ac675806
1 changed files with 5 additions and 3 deletions
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8
lib/zlib_inflate/inflate.c
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@ -743,12 +743,14 @@ int zlib_inflate(z_streamp strm, int flush)
strm->data_type = state->bits + (state->last ? 64 : 0) +
(state->mode == TYPE ? 128 : 0);
if (flush == Z_PACKET_FLUSH && ret == Z_OK &&
strm->avail_out != 0 && strm->avail_in == 0)
return zlib_inflateSyncPacket(strm);
if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
ret = Z_BUF_ERROR;
if (flush == Z_PACKET_FLUSH && ret == Z_OK &&
(strm->avail_out != 0 || strm->avail_in == 0))
return zlib_inflateSyncPacket(strm);
return ret;
}