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=-8.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 0E598C31E45 for ; Thu, 13 Jun 2019 16:26:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D802920644 for ; Thu, 13 Jun 2019 16:26:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560443183; bh=kE+uGtDQKW1Jj3Yciy+XjTzpwYjBRNkMuTsYOVYmenw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YvcUOT2zNQTRCywrPO8wvkm4+mQ86nrxLJaAght7CJBciC3RgPVNz0oi62woxVXbM emCOYTtvKXoedVOjbhWEV00Ps2zq2KzM+bnPYdXIAWTMzaw1rBBxWdIwWDuViLCo9j aMF7SvLcgEaAtg/4znAchh4EvIoK+hKbC8hb45Pw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392319AbfFMQ0W (ORCPT ); Thu, 13 Jun 2019 12:26:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:53800 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730962AbfFMIgQ (ORCPT ); Thu, 13 Jun 2019 04:36:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D267E2146F; Thu, 13 Jun 2019 08:36:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560414975; bh=kE+uGtDQKW1Jj3Yciy+XjTzpwYjBRNkMuTsYOVYmenw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YJF8EQjxvxnY+pm7Z5kkmz5OGnbSDaCGb+/QCmpgo+DmSUFrmILasfw4Ku8U5Obfw ddGp295kVnLiz9fK6c5jkthrZ1BbrnLp13jHgVeFUjHnUgDDoblo0zmoKHCLxeM4UI u/8764xMoLQPKchf2MDIJeO8dL8dheWNZYw0lxVk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Binbin Wu , Mika Westerberg , Andy Shevchenko , Lee Jones , Sasha Levin Subject: [PATCH 4.14 17/81] mfd: intel-lpss: Set the device in reset state when init Date: Thu, 13 Jun 2019 10:33:00 +0200 Message-Id: <20190613075650.334771159@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190613075649.074682929@linuxfoundation.org> References: <20190613075649.074682929@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit dad06532292d77f37fbe831a02948a593500f682 ] In virtualized setup, when system reboots due to warm reset interrupt storm is seen. Call Trace: dump_stack+0x70/0xa5 __report_bad_irq+0x2e/0xc0 note_interrupt+0x248/0x290 ? add_interrupt_randomness+0x30/0x220 handle_irq_event_percpu+0x54/0x80 handle_irq_event+0x39/0x60 handle_fasteoi_irq+0x91/0x150 handle_irq+0x108/0x180 do_IRQ+0x52/0xf0 common_interrupt+0xf/0xf RIP: 0033:0x76fc2cfabc1d Code: 24 28 bf 03 00 00 00 31 c0 48 8d 35 63 77 0e 00 48 8d 15 2e 94 0e 00 4c 89 f9 49 89 d9 4c 89 d3 e8 b8 e2 01 00 48 8b 54 24 18 <48> 89 ef 48 89 de 4c 89 e1 e8 d5 97 01 00 84 c0 74 2d 48 8b 04 24 RSP: 002b:00007ffd247c1fc0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffffda RAX: 0000000000000000 RBX: 00007ffd247c1ff0 RCX: 000000000003d3ce RDX: 0000000000000000 RSI: 00007ffd247c1ff0 RDI: 000076fc2cbb6010 RBP: 000076fc2cded010 R08: 00007ffd247c2210 R09: 00007ffd247c22a0 R10: 000076fc29465470 R11: 0000000000000000 R12: 00007ffd247c1fc0 R13: 000076fc2ce8e470 R14: 000076fc27ec9960 R15: 0000000000000414 handlers: [<000000000d3fa913>] idma64_irq Disabling IRQ #27 To avoid interrupt storm, set the device in reset state before bringing out the device from reset state. Changelog v2: - correct the subject line by adding "mfd: " Signed-off-by: Binbin Wu Acked-by: Mika Westerberg Reviewed-by: Andy Shevchenko Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/intel-lpss.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c index 40e8d9b59d07..b5c4f8f974aa 100644 --- a/drivers/mfd/intel-lpss.c +++ b/drivers/mfd/intel-lpss.c @@ -273,6 +273,9 @@ static void intel_lpss_init_dev(const struct intel_lpss *lpss) { u32 value = LPSS_PRIV_SSP_REG_DIS_DMA_FIN; + /* Set the device in reset state */ + writel(0, lpss->priv + LPSS_PRIV_RESETS); + intel_lpss_deassert_reset(lpss); intel_lpss_set_remap_addr(lpss); -- 2.20.1