tree a0124f4c755eccdab837d6edbb758b2eed1b6ebe
parent 4b4f3accd80304781c648b26ce4d53df082a4087
author Ferdinand Blomqvist <ferdinand.blomqvist@gmail.com> 1561039834 +0300
committer Thomas Gleixner <tglx@linutronix.de> 1561553745 +0200

rslib: Fix decoding of shortened codes

The decoding of shortenend codes is broken. It only works as expected if
there are no erasures.

When decoding with erasures, Lambda (the error and erasure locator
polynomial) is initialized from the given erasure positions. The pad
parameter is not accounted for by the initialisation code, and hence
Lambda is initialized from incorrect erasure positions.

The fix is to adjust the erasure positions by the supplied pad.

Signed-off-by: Ferdinand Blomqvist <ferdinand.blomqvist@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190620141039.9874-3-ferdinand.blomqvist@gmail.com