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[130.233.10.238]) by smtp.gmail.com with ESMTPSA id o7sm1060058ljj.23.2019.03.30.11.30.09 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 30 Mar 2019 11:30:09 -0700 (PDT) From: Ferdinand Blomqvist To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner Subject: [RFC PATCH 2/7] rslib: Fix decoding of shortened codes Date: Sat, 30 Mar 2019 20:29:42 +0200 Message-Id: <20190330182947.8823-3-ferdinand.blomqvist@gmail.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190330182947.8823-1-ferdinand.blomqvist@gmail.com> References: <20190330182947.8823-1-ferdinand.blomqvist@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The decoder is broken. It only works with full length codes. Signed-off-by: Ferdinand Blomqvist --- lib/reed_solomon/decode_rs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/reed_solomon/decode_rs.c b/lib/reed_solomon/decode_rs.c index 1db74eb098d0..3313bf944ff1 100644 --- a/lib/reed_solomon/decode_rs.c +++ b/lib/reed_solomon/decode_rs.c @@ -99,9 +99,9 @@ if (no_eras > 0) { /* Init lambda to be the erasure locator polynomial */ lambda[1] = alpha_to[rs_modnn(rs, - prim * (nn - 1 - eras_pos[0]))]; + prim * (nn - 1 - (eras_pos[0] + pad)))]; for (i = 1; i < no_eras; i++) { - u = rs_modnn(rs, prim * (nn - 1 - eras_pos[i])); + u = rs_modnn(rs, prim * (nn - 1 - (eras_pos[i] + pad))); for (j = i + 1; j > 0; j--) { tmp = index_of[lambda[j - 1]]; if (tmp != nn) { -- 2.17.2