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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 228A1C43603 for ; Mon, 16 Dec 2019 18:26:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE9312176D for ; Mon, 16 Dec 2019 18:26:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576520816; bh=o5DgSwACQn3g13+wAyuxHX+E7BQK/uk71Z4ObQXjzYg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WM0Cq/ir+T/mifIaT+m/hNUUJbmMyd7LZeuFkoj59JefTANa9PHCyr3BJPIEivzr8 MmaWtwIOo9X9hV+apaRmcN/n/PpTIAp1HPGL7H+3yKRd6hBAOqyuDCxc1dxfUNmETV md7fP8y+k+JdZ3pfMbO2yFWFu4Gffsr8LvIHm54U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731541AbfLPSQ3 (ORCPT ); Mon, 16 Dec 2019 13:16:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:39032 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731535AbfLPSQ3 (ORCPT ); Mon, 16 Dec 2019 13:16:29 -0500 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 35BA8207FF; Mon, 16 Dec 2019 18:16:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576520188; bh=o5DgSwACQn3g13+wAyuxHX+E7BQK/uk71Z4ObQXjzYg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JZKoJYzFyKGvWckqmZcrAm/p78wFbI7zTGEVb5qVjz8jHp+r6UphP0P5LdwSE5d+P /C9hSVobbxbJFxxWVBD0AvKjYXrwjmo1rjLNzqI/CpruFGS77yYONRrP/7NS2OmrNp fDy5WSjXT4EdBQql//ZQcEVC0C7Ix9qrsfF/4Pdg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Meng Li , Thor Thayer , Borislav Petkov , James Morse , linux-edac , Mauro Carvalho Chehab , Robert Richter , Tony Luck Subject: [PATCH 5.4 053/177] EDAC/altera: Use fast register IO for S10 IRQs Date: Mon, 16 Dec 2019 18:48:29 +0100 Message-Id: <20191216174830.591722289@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191216174811.158424118@linuxfoundation.org> References: <20191216174811.158424118@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org From: Meng Li commit 56d9e7bd3fa0f105b6670021d167744bc50ae4fe upstream. When an IRQ occurs, regmap_{read,write,...}() is invoked in atomic context. Regmap must indicate register IO is fast so that a spinlock is used instead of a mutex to avoid sleeping in atomic context: lock_acquire __mutex_lock mutex_lock_nested regmap_lock_mutex regmap_write a10_eccmgr_irq_unmask unmask_irq.part.0 irq_enable __irq_startup irq_startup __setup_irq request_threaded_irq devm_request_threaded_irq altr_sdram_probe Mark it so. [ bp: Massage. ] Fixes: 3dab6bd52687 ("EDAC, altera: Add support for Stratix10 SDRAM EDAC") Reported-by: Meng Li Signed-off-by: Meng Li Signed-off-by: Thor Thayer Signed-off-by: Borislav Petkov Cc: James Morse Cc: linux-edac Cc: Mauro Carvalho Chehab Cc: Robert Richter Cc: stable Cc: Tony Luck Link: https://lkml.kernel.org/r/1574361048-17572-2-git-send-email-thor.thayer@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/edac/altera_edac.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/edac/altera_edac.c +++ b/drivers/edac/altera_edac.c @@ -560,6 +560,7 @@ static const struct regmap_config s10_sd .reg_write = s10_protected_reg_write, .use_single_read = true, .use_single_write = true, + .fast_io = true, }; /************** ***********/