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BCH Encoding/Decoding

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I've notieced that in order to decode a page of in-band data, the linux
kernel code first computes the out-of-band ECC bytes on the given
in-band data (calc_ecc). It is also passed the received oob data
recv_ecc. 

If (byte-by-byte) the calc_ecc does not match the recv_data, then
the page is decoded. 

Why not compute the decoded ECC and compute the locator
vector/polynomial right off? Are these operations much
more expensive than encoding and comparing?

--Randyh

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BCH Encoding/Decoding Randy Yates <yates@digitalsignallabs.com> - 2020-11-24 17:20 -0500
  Re: BCH Encoding/Decoding spope384@gmail.com (Steve Pope) - 2020-11-28 04:27 +0000

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