Subject: [PATCH v2 25/29] crypto: x86/aegis - use the new scatterwalk functions

From: Eric Biggers <[email-masked]>
Date: Sun, 29 Dec 2024 16:14:14 -0800

From: Eric Biggers <[email-masked]>

In crypto_aegis128_aesni_process_ad(), use scatterwalk_next() which
consolidates scatterwalk_clamp() and scatterwalk_map().  Use
scatterwalk_done_src() which consolidates scatterwalk_unmap(),
scatterwalk_advance(), and scatterwalk_done().

Signed-off-by: Eric Biggers <[email-masked]>
---
 arch/x86/crypto/aegis128-aesni-glue.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/x86/crypto/aegis128-aesni-glue.c b/arch/x86/crypto/aegis128-aesni-glue.c
index 01fa568dc5fc..1bd093d073ed 100644
--- a/arch/x86/crypto/aegis128-aesni-glue.c
+++ b/arch/x86/crypto/aegis128-aesni-glue.c
@@ -69,14 +69,14 @@ static void crypto_aegis128_aesni_process_ad(
 	struct aegis_block buf;
 	unsigned int pos = 0;
 
 	scatterwalk_start(&walk, sg_src);
 	while (assoclen != 0) {
-		unsigned int size = scatterwalk_clamp(&walk, assoclen);
+		unsigned int size;
+		const u8 *mapped = scatterwalk_next(&walk, assoclen, &size);
 		unsigned int left = size;
-		void *mapped = scatterwalk_map(&walk);
-		const u8 *src = (const u8 *)mapped;
+		const u8 *src = mapped;
 
 		if (pos + size >= AEGIS128_BLOCK_SIZE) {
 			if (pos > 0) {
 				unsigned int fill = AEGIS128_BLOCK_SIZE - pos;
 				memcpy(buf.bytes + pos, src, fill);
@@ -95,13 +95,11 @@ static void crypto_aegis128_aesni_process_ad(
 
 		memcpy(buf.bytes + pos, src, left);
 		pos += left;
 		assoclen -= size;
 
-		scatterwalk_unmap(mapped);
-		scatterwalk_advance(&walk, size);
-		scatterwalk_done(&walk, 0, assoclen);
+		scatterwalk_done_src(&walk, mapped, size);
 	}
 
 	if (pos > 0) {
 		memset(buf.bytes + pos, 0, AEGIS128_BLOCK_SIZE - pos);
 		aegis128_aesni_ad(state, buf.bytes, AEGIS128_BLOCK_SIZE);
-- 
2.47.1