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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2EF99EB64DB for ; Mon, 19 Jun 2023 11:02:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232599AbjFSLCp (ORCPT ); Mon, 19 Jun 2023 07:02:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232519AbjFSLCU (ORCPT ); Mon, 19 Jun 2023 07:02:20 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07E4F213D for ; Mon, 19 Jun 2023 04:01:15 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CE6D660A05 for ; Mon, 19 Jun 2023 11:01:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E37AFC433C8; Mon, 19 Jun 2023 11:01:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687172475; bh=g0CC2XjnWHN7o46Alid9OcWQuVHVkrpIHUcsONZdWno=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pik05iSehpvPyQtK01NeXWyuesPUCo0Mt/j9n5ZDkkf56us6rwscyDsvRlygS9+Ww Z09XawXYVraRpN3ba9kHnlaCipAnUWAbO0kJt3LHV41KnG0jdqWH2vkvC1vsSY/ESQ p+NT3YLRRN54OXFsoJWrLF55WDoEIbm1CCypCBZA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bernhard Seibold , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Subject: [PATCH 5.15 056/107] serial: lantiq: add missing interrupt ack Date: Mon, 19 Jun 2023 12:30:40 +0200 Message-ID: <20230619102144.171046657@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102141.541044823@linuxfoundation.org> References: <20230619102141.541044823@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Bernhard Seibold commit 306320034e8fbe7ee1cc4f5269c55658b4612048 upstream. Currently, the error interrupt is never acknowledged, so once active it will stay active indefinitely, causing the handler to be called in an infinite loop. Fixes: 2f0fc4159a6a ("SERIAL: Lantiq: Add driver for MIPS Lantiq SOCs.") Cc: Signed-off-by: Bernhard Seibold Reviewed-by: Ilpo Järvinen Message-ID: <20230602133029.546-1-mail@bernhard-seibold.de> Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/lantiq.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -274,6 +274,7 @@ lqasc_err_int(int irq, void *_port) struct ltq_uart_port *ltq_port = to_ltq_uart_port(port); spin_lock_irqsave(<q_port->lock, flags); + __raw_writel(ASC_IRNCR_EIR, port->membase + LTQ_ASC_IRNCR); /* clear any pending interrupts */ asc_update_bits(0, ASCWHBSTATE_CLRPE | ASCWHBSTATE_CLRFE | ASCWHBSTATE_CLRROE, port->membase + LTQ_ASC_WHBSTATE);