[PATCH] crypto: x86/poly1305 - add back a needed assignment

[Eric Biggers]

From: Eric Biggers <ebigg...@google.com>

One of the assignments that was removed by commit 4a0c1de64bf9 ("crypto:
x86/poly1305 - Remove assignments with no effect") is actually needed,
since it affects the return value.

This fixes the following crypto self-test failure:

    alg: shash: poly1305-simd test failed (wrong result) on test vector 2, 
cfg="init+update+final aligned buffer"

Fixes: 4a0c1de64bf9 ("crypto: x86/poly1305 - Remove assignments with no effect")
Signed-off-by: Eric Biggers <ebigg...@google.com>
---

Note, this is a regression in mainline, so please include this in a pull
request for 5.10.

 arch/x86/crypto/poly1305_glue.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/crypto/poly1305_glue.c b/arch/x86/crypto/poly1305_glue.c
index e508dbd91813..c44aba290fbb 100644
--- a/arch/x86/crypto/poly1305_glue.c
+++ b/arch/x86/crypto/poly1305_glue.c
@@ -158,6 +158,7 @@ static unsigned int crypto_poly1305_setdctxkey(struct 
poly1305_desc_ctx *dctx,
                        dctx->s[1] = get_unaligned_le32(&inp[4]);
                        dctx->s[2] = get_unaligned_le32(&inp[8]);
                        dctx->s[3] = get_unaligned_le32(&inp[12]);
+                       acc += POLY1305_BLOCK_SIZE;
                        dctx->sset = true;
                }
        }
-- 
2.29.0.rc1.297.gfa9743e501-goog