From patchwork Fri Dec 20 04:17:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Finn Thain X-Patchwork-Id: 1213908 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=telegraphics.com.au Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47fFwv2MFbz9sPW for ; Fri, 20 Dec 2019 15:23:27 +1100 (AEDT) Received: from localhost ([::1]:50504 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ii9oy-0001Sb-NJ for incoming@patchwork.ozlabs.org; Thu, 19 Dec 2019 23:23:24 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:55693) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ii9ng-0008TI-4H for qemu-devel@nongnu.org; Thu, 19 Dec 2019 23:22:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ii9ne-0001yi-E5 for qemu-devel@nongnu.org; Thu, 19 Dec 2019 23:22:03 -0500 Received: from kvm5.telegraphics.com.au ([98.124.60.144]:34416) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ii9ne-0001xK-6E; Thu, 19 Dec 2019 23:22:02 -0500 Received: by kvm5.telegraphics.com.au (Postfix, from userid 502) id EE6062829C; Thu, 19 Dec 2019 23:22:01 -0500 (EST) To: Jason Wang , qemu-devel@nongnu.org Message-Id: In-Reply-To: References: From: Finn Thain Subject: [PATCH v2 02/13] dp8393x: Clean up endianness hacks Date: Fri, 20 Dec 2019 15:17:46 +1100 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 98.124.60.144 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Aleksandar Rikalo , =?utf-8?q?Herv=C3=A9_?= =?utf-8?q?Poussineau?= , Laurent Vivier , qemu-stable@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The in_use field is no different to the other words handled using dp8393x_put() and dp8393x_get(). Use the same technique for in_use that is used everywhere else. Signed-off-by: Finn Thain --- Changed since v1: - Use existing 'address' variable rather than declare a new one. Laurent tells me that this clean-up has been tried before. He referred me to commit c744cf7879 ("dp8393x: fix dp8393x_receive()") and commit 409b52bfe1 ("net/dp8393x: correctly reset in_use field"). Both of those patches look wrong to me because they both pass the wrong byte count to address_space_rw(). It's possible that those patches were needed to work around some kind of bug elsewhere, for example, an off-by-one result from dp8393x_crda(). The preceding patch in this series might help there. --- hw/net/dp8393x.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/hw/net/dp8393x.c b/hw/net/dp8393x.c index 1957bd391e..b2cc768d9b 100644 --- a/hw/net/dp8393x.c +++ b/hw/net/dp8393x.c @@ -765,8 +765,6 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf, return -1; } - /* XXX: Check byte ordering */ - /* Check for EOL */ if (s->regs[SONIC_LLFA] & SONIC_DESC_EOL) { /* Are we still in resource exhaustion? */ @@ -836,15 +834,12 @@ static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf, /* EOL detected */ s->regs[SONIC_ISR] |= SONIC_ISR_RDE; } else { - /* Clear in_use, but it is always 16bit wide */ - int offset = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width; - if (s->big_endian && width == 2) { - /* we need to adjust the offset of the 16bit field */ - offset += sizeof(uint16_t); - } - s->data[0] = 0; - address_space_rw(&s->as, offset, MEMTXATTRS_UNSPECIFIED, - (uint8_t *)s->data, sizeof(uint16_t), 1); + /* Clear in_use */ + address = dp8393x_crda(s) + sizeof(uint16_t) * 6 * width; + size = sizeof(uint16_t) * width; + dp8393x_put(s, width, 0, 0); + address_space_rw(&s->as, address, MEMTXATTRS_UNSPECIFIED, + (uint8_t *)s->data, size, 1); s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA]; s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX; s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | (((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff);