From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 C2A44C76188 for ; Fri, 19 Jul 2019 05:49:17 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 47ABF2173B for ; Fri, 19 Jul 2019 05:49:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Parq9vli" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 47ABF2173B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45qg6z28bvzDqQW for ; Fri, 19 Jul 2019 15:49:15 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=sashal@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Parq9vli"; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 45qd2N6tByzDqPS for ; Fri, 19 Jul 2019 14:15:08 +1000 (AEST) Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 36ACA21873; Fri, 19 Jul 2019 04:15:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563509706; bh=CzhaAv+1g3tc7icQWTPDGHo0swJkwJI0NH1Fk+Xz0mc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Parq9vliu2E8RZWglf6Nfxc4x/O0C7FoF14VAI8gBHTdyABLBhaJ68j2FJN9JLCxK CG2umtLTrwlT2CZwFdmTcgkGsjX3E2ArjqquVbY0ivAnAwhW5Xqy6fZZQoa419MYpU oyZran+7QGQUV2td598BNKoaUd7PxQWssBN3h61U= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 23/35] powerpc/4xx/uic: clear pending interrupt after irq type/pol change Date: Fri, 19 Jul 2019 00:14:11 -0400 Message-Id: <20190719041423.19322-23-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190719041423.19322-1-sashal@kernel.org> References: <20190719041423.19322-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , linuxppc-dev@lists.ozlabs.org, Christian Lamparter Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Christian Lamparter [ Upstream commit 3ab3a0689e74e6aa5b41360bc18861040ddef5b1 ] When testing out gpio-keys with a button, a spurious interrupt (and therefore a key press or release event) gets triggered as soon as the driver enables the irq line for the first time. This patch clears any potential bogus generated interrupt that was caused by the switching of the associated irq's type and polarity. Signed-off-by: Christian Lamparter Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin --- arch/powerpc/sysdev/uic.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c index 6893d8f236df..225346dda151 100644 --- a/arch/powerpc/sysdev/uic.c +++ b/arch/powerpc/sysdev/uic.c @@ -158,6 +158,7 @@ static int uic_set_irq_type(struct irq_data *d, unsigned int flow_type) mtdcr(uic->dcrbase + UIC_PR, pr); mtdcr(uic->dcrbase + UIC_TR, tr); + mtdcr(uic->dcrbase + UIC_SR, ~mask); raw_spin_unlock_irqrestore(&uic->lock, flags); -- 2.20.1