From 0eb76bcfd8fe528c985fe784e8c2227a4973b17f Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Mon, 18 Oct 2021 23:46:54 -0500
Subject: [PATCH] linuxkm: add missing RESTORE_VECTOR_REGISTERS() in
 wolfcrypt/src/poly1305.c:wc_Poly1305Update().

---
 wolfcrypt/src/poly1305.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/poly1305.c b/wolfcrypt/src/poly1305.c
index 816efb236..c21ddafd2 100644
--- a/wolfcrypt/src/poly1305.c
+++ b/wolfcrypt/src/poly1305.c
@@ -724,8 +724,10 @@ int wc_Poly1305Update(Poly1305* ctx, const byte* m, word32 bytes)
             bytes -= (word32)want;
             m += want;
             ctx->leftover += want;
-            if (ctx->leftover < sizeof(ctx->buffer))
+            if (ctx->leftover < sizeof(ctx->buffer)) {
+                RESTORE_VECTOR_REGISTERS();
                 return 0;
+            }
 
             if (!ctx->started)
                 poly1305_calc_powers_avx2(ctx);