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 EFA5DEB64D9 for ; Mon, 19 Jun 2023 10:48:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231982AbjFSKsZ (ORCPT ); Mon, 19 Jun 2023 06:48:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232098AbjFSKsH (ORCPT ); Mon, 19 Jun 2023 06:48:07 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1794B1BC1 for ; Mon, 19 Jun 2023 03:47:36 -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 9E23560A50 for ; Mon, 19 Jun 2023 10:47:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4E6DC433C0; Mon, 19 Jun 2023 10:47:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687171655; bh=/SN+nJwgPPz/9CEA1Fg6E2GnXv0zZ4/1ziZNQrSnIY8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e/roNDfcYm/90fN+jwE83wWrsOurFniqKGhZIbL6gXCQHZsxgg8GttsgyGCsjPHFd taDR7EX5nOc5uDJhlcFvf85/XKqLzmhsUoC4oy3yEFVP3u82W/rBsS8Pm/vjvqTtBc hJ3gu7xfgFUxErthN1qxBJRuFLWoNGkJlbTR/30k= 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 6.1 082/166] serial: lantiq: add missing interrupt ack Date: Mon, 19 Jun 2023 12:29:19 +0200 Message-ID: <20230619102158.792001581@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102154.568541872@linuxfoundation.org> References: <20230619102154.568541872@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 @@ -278,6 +278,7 @@ 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);