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The btrfs_decompress() function mostly (u32)-1 on error but it can also return -EPERM or other kernel error codes from zstd_decompress(). The "ret" variable is an int, so we could just check for negatives. Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Qu Wenruo <wqu@suse.com>
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