From 57053a10cfdbd854607162021200b886bfa4e0a0 Mon Sep 17 00:00:00 2001
From: Sam Leffler <sam@FreeBSD.org>
Date: Wed, 19 Nov 2003 22:42:34 +0000
Subject: [PATCH] eliminate an unnecessary 8Kbyte bzero that was being done for
 each submitted operation

Submitted by:	Thor Lancelot Simon
Reviewed by:	jhb
Approved by:	re (jhb)
---
 sys/opencrypto/cryptodev.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/sys/opencrypto/cryptodev.c b/sys/opencrypto/cryptodev.c
index 51617f5f58b6..1d2398f1a31f 100644
--- a/sys/opencrypto/cryptodev.c
+++ b/sys/opencrypto/cryptodev.c
@@ -72,7 +72,7 @@ struct csession {
 	int		mackeylen;
 	u_char		tmp_mac[CRYPTO_MAX_MAC_LEN];
 
-	struct iovec	iovec[UIO_MAXIOV];
+	struct iovec	iovec;
 	struct uio	uio;
 	int		error;
 };
@@ -317,7 +317,7 @@ cryptodev_op(
 {
 	struct cryptop *crp = NULL;
 	struct cryptodesc *crde = NULL, *crda = NULL;
-	int i, error;
+	int error;
 
 	if (cop->len > 256*1024-4)
 		return (E2BIG);
@@ -325,18 +325,15 @@ cryptodev_op(
 	if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
 		return (EINVAL);
 
-	bzero(&cse->uio, sizeof(cse->uio));
+	cse->uio.uio_iov = &cse->iovec;
 	cse->uio.uio_iovcnt = 1;
-	cse->uio.uio_resid = 0;
+	cse->uio.uio_offset = 0;
+	cse->uio.uio_resid = cop->len;
 	cse->uio.uio_segflg = UIO_SYSSPACE;
 	cse->uio.uio_rw = UIO_WRITE;
 	cse->uio.uio_td = td;
-	cse->uio.uio_iov = cse->iovec;
-	bzero(&cse->iovec, sizeof(cse->iovec));
 	cse->uio.uio_iov[0].iov_len = cop->len;
 	cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
-	for (i = 0; i < cse->uio.uio_iovcnt; i++)
-		cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len;
 
 	crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
 	if (crp == NULL) {