From patchwork Sat May 15 11:32:46 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: 12259701 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=-13.7 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 362EEC433ED for ; Sat, 15 May 2021 11:37:50 +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 CE3C96121E for ; Sat, 15 May 2021 11:37:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CE3C96121E 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]:56030 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lhsc8-0007yk-UY for qemu-devel@archiver.kernel.org; Sat, 15 May 2021 07:37:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46400) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhsXb-0003Rg-4z for qemu-devel@nongnu.org; Sat, 15 May 2021 07:33:07 -0400 Received: from mailout12.t-online.de ([194.25.134.22]:47762) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhsXY-0003GS-Of for qemu-devel@nongnu.org; Sat, 15 May 2021 07:33:06 -0400 Received: from fwd39.aul.t-online.de (fwd39.aul.t-online.de [172.20.27.138]) by mailout12.t-online.de (Postfix) with SMTP id 34DA55D235; Sat, 15 May 2021 13:33:02 +0200 (CEST) Received: from linpower.localnet (XZZDzuZDghvnecW356e8qedTJZUM5w1vEPVnwDnGgrjpPFipGTzjz6wA+smHHocZp1@[79.208.18.63]) by fwd39.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1lhsXU-0RXdiK0; Sat, 15 May 2021 13:33:00 +0200 Received: by linpower.localnet (Postfix, from userid 1000) id A60BF200620; Sat, 15 May 2021 13:32:54 +0200 (CEST) From: =?utf-8?q?Volker_R=C3=BCmelin?= To: "Michael S. Tsirkin" , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH v3 03/11] ps2: don't deassert irq twice if queue is empty Date: Sat, 15 May 2021 13:32:46 +0200 Message-Id: <20210515113254.6245-3-vr_qemu@t-online.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 X-ID: XZZDzuZDghvnecW356e8qedTJZUM5w1vEPVnwDnGgrjpPFipGTzjz6wA+smHHocZp1 X-TOI-EXPURGATEID: 150726::1621078380-00003E8E-50EA5928/0/0 CLEAN NORMAL X-TOI-MSGID: 3b974682-be1d-4446-8147-0a8827e9ee05 Received-SPF: none client-ip=194.25.134.22; envelope-from=volker.ruemelin@t-online.de; helo=mailout12.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; }