From patchwork Tue May 25 18:14:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Volker_R=C3=BCmelin?= X-Patchwork-Id: 12279851 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43F8FC47084 for ; Tue, 25 May 2021 18:18:29 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 0130E61404 for ; Tue, 25 May 2021 18:18:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0130E61404 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=t-online.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1llbdM-0005aB-3V for qemu-devel@archiver.kernel.org; Tue, 25 May 2021 14:18:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48722) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llba1-0002Xq-Kh for qemu-devel@nongnu.org; Tue, 25 May 2021 14:15:01 -0400 Received: from mailout08.t-online.de ([194.25.134.20]:46972) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llbZs-0003bE-OT for qemu-devel@nongnu.org; Tue, 25 May 2021 14:15:01 -0400 Received: from fwd31.aul.t-online.de (fwd31.aul.t-online.de [172.20.26.136]) by mailout08.t-online.de (Postfix) with SMTP id 492DB4DFCC; Tue, 25 May 2021 20:14:50 +0200 (CEST) Received: from linpower.localnet (ZB2nFrZfwhh4OLP8-W3rZf9hFyPZ6I0z9dAcDRrHDoa-7rStRysTY-LLrTOgqFEgaV@[93.236.158.49]) by fwd31.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1llbZn-23a8rw0; Tue, 25 May 2021 20:14:47 +0200 Received: by linpower.localnet (Postfix, from userid 1000) id 8764E2000A7; Tue, 25 May 2021 20:14:41 +0200 (CEST) From: =?utf-8?q?Volker_R=C3=BCmelin?= To: "Michael S. Tsirkin" , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Gerd Hoffmann Subject: [PATCH v4 03/12] ps2: don't deassert irq twice if queue is empty Date: Tue, 25 May 2021 20:14:32 +0200 Message-Id: <20210525181441.27768-3-vr_qemu@t-online.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <79355790-0f6f-7a3f-3525-4846c88ba8e2@t-online.de> References: <79355790-0f6f-7a3f-3525-4846c88ba8e2@t-online.de> MIME-Version: 1.0 X-ID: ZB2nFrZfwhh4OLP8-W3rZf9hFyPZ6I0z9dAcDRrHDoa-7rStRysTY-LLrTOgqFEgaV X-TOI-EXPURGATEID: 150726::1621966487-000102A7-40EBE6F2/0/0 CLEAN NORMAL X-TOI-MSGID: 2dc7ec04-7dd5-450e-bbbc-b71738c902b4 Received-SPF: none client-ip=194.25.134.20; envelope-from=volker.ruemelin@t-online.de; helo=mailout08.t-online.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Don't deassert the irq twice if the queue is empty. While the second deassertion doesn't do any harm, it's unnecessary. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Volker Rümelin --- hw/input/ps2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/input/ps2.c b/hw/input/ps2.c index 55a81a0c51..4aee46a595 100644 --- a/hw/input/ps2.c +++ b/hw/input/ps2.c @@ -519,7 +519,9 @@ uint32_t ps2_read_data(PS2State *s) /* reading deasserts IRQ */ s->update_irq(s->update_arg, 0); /* reassert IRQs if data left */ - s->update_irq(s->update_arg, q->count != 0); + if (q->count) { + s->update_irq(s->update_arg, 1); + } } return val; }