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fs: btrfs: Use LZO_LEN to replace immediate number
Just a cleanup. These immediate numbers make my eyes hurt. Signed-off-by: Qu Wenruo <wqu@suse.com> Cc: Marek Behun <marek.behun@nic.cz> Reviewed-by: Marek Behún <marek.behun@nic.cz>
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1 changed files with 12 additions and 10 deletions
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@ -12,36 +12,38 @@
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#include <u-boot/zlib.h>
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#include <asm/unaligned.h>
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/* Header for each segment, LE32, recording the compressed size */
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#define LZO_LEN 4
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static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen)
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{
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u32 tot_len, in_len, res;
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size_t out_len;
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int ret;
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if (clen < 4)
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if (clen < LZO_LEN)
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return -1;
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tot_len = le32_to_cpu(get_unaligned((u32 *)cbuf));
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cbuf += 4;
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clen -= 4;
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tot_len -= 4;
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cbuf += LZO_LEN;
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clen -= LZO_LEN;
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tot_len -= LZO_LEN;
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if (tot_len == 0 && dlen)
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return -1;
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if (tot_len < 4)
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if (tot_len < LZO_LEN)
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return -1;
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res = 0;
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while (tot_len > 4) {
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while (tot_len > LZO_LEN) {
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in_len = le32_to_cpu(get_unaligned((u32 *)cbuf));
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cbuf += 4;
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clen -= 4;
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cbuf += LZO_LEN;
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clen -= LZO_LEN;
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if (in_len > clen || tot_len < 4 + in_len)
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if (in_len > clen || tot_len < LZO_LEN + in_len)
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return -1;
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tot_len -= 4 + in_len;
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tot_len -= (LZO_LEN + in_len);
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out_len = dlen;
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ret = lzo1x_decompress_safe(cbuf, in_len, dbuf, &out_len);
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