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| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2019-05-09 11:18:57 +0300 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2019-05-09 11:19:03 +0300 |
| commit | 752c4f3c1d19708578257ecc041672b6d8afb9bf (patch) | |
| tree | 75bf7773e3dcddb495540dbd3fd135702de738eb /lib/lzo/lzo1x_compress.c | |
| parent | 3be2071004bf748ed39e54ccda85caaa774c7ccd (diff) | |
| parent | eb85d03e01c3e9f3b0ba7282b2e3515a635decb2 (diff) | |
| download | linux-752c4f3c1d19708578257ecc041672b6d8afb9bf.tar.xz | |
Merge remote-tracking branch 'drm/drm-next' into drm-misc-next
Requested for backmerging airlied's drm-legacy cleanup.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'lib/lzo/lzo1x_compress.c')
| -rw-r--r-- | lib/lzo/lzo1x_compress.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/lzo/lzo1x_compress.c b/lib/lzo/lzo1x_compress.c index 4525fb094844..a8ede77afe0d 100644 --- a/lib/lzo/lzo1x_compress.c +++ b/lib/lzo/lzo1x_compress.c @@ -291,13 +291,14 @@ int lzogeneric1x_1_compress(const unsigned char *in, size_t in_len, { const unsigned char *ip = in; unsigned char *op = out; + unsigned char *data_start; size_t l = in_len; size_t t = 0; signed char state_offset = -2; unsigned int m4_max_offset; - // LZO v0 will never write 17 as first byte, - // so this is used to version the bitstream + // LZO v0 will never write 17 as first byte (except for zero-length + // input), so this is used to version the bitstream if (bitstream_version > 0) { *op++ = 17; *op++ = bitstream_version; @@ -306,6 +307,8 @@ int lzogeneric1x_1_compress(const unsigned char *in, size_t in_len, m4_max_offset = M4_MAX_OFFSET_V0; } + data_start = op; + while (l > 20) { size_t ll = l <= (m4_max_offset + 1) ? l : (m4_max_offset + 1); uintptr_t ll_end = (uintptr_t) ip + ll; @@ -324,7 +327,7 @@ int lzogeneric1x_1_compress(const unsigned char *in, size_t in_len, if (t > 0) { const unsigned char *ii = in + in_len - t; - if (op == out && t <= 238) { + if (op == data_start && t <= 238) { *op++ = (17 + t); } else if (t <= 3) { op[state_offset] |= t; |