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[2620:137:e000::1:20]) by mx.google.com with ESMTP id z5-20020a170903018500b001a22091eea9si10981506plg.225.2023.04.04.07.15.41; Tue, 04 Apr 2023 07:15:58 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=LGGP+RsX; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235761AbjDDOCt (ORCPT + 99 others); Tue, 4 Apr 2023 10:02:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37854 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234987AbjDDOCg (ORCPT ); Tue, 4 Apr 2023 10:02:36 -0400 Received: from mail-yw1-x1131.google.com (mail-yw1-x1131.google.com [IPv6:2607:f8b0:4864:20::1131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AC5F4EC4 for ; Tue, 4 Apr 2023 07:02:09 -0700 (PDT) Received: by mail-yw1-x1131.google.com with SMTP id 00721157ae682-536af432ee5so616033027b3.0 for ; Tue, 04 Apr 2023 07:02:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1680616917; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=GhHi1rvDP10jyqp6elYeOU798evHTjpyzcCbCEvb8Kc=; b=LGGP+RsXJ62qou0+C1xjBzSyj+8IzaLTZ6O/t/gVnmwtvFnC8CePoPk8ZSiKmtZ09t 6ZgPlk78Ov+L/lKuSWrK7/vcNqb+EqUk9ChBn3+Fm4XANMzbqL++UxnSlFEODa425ByS 5utDLusg1dlDtgj9zNNKadRhGRDgu21cjvn5qcyZugFQNGAfWbVDrbwgoCyjWVqN/avT Qsr6WQ0m8uRFtpoUgAA805PfrP+Ewzw/0pQJ0AI7ecxOK51thHJMATbvv2X69/r6WEBp YI8pd/8vgMCFEUSGNGt5VodRwGnzA7rFEaPI+dHmEPvkYKwGaEOf0r9AS9ZzDDL0oXv2 8Deg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680616917; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GhHi1rvDP10jyqp6elYeOU798evHTjpyzcCbCEvb8Kc=; b=CFXVW4auWq5OChzcP+GKsP16MC/K1rZk6y/QjXYZT+D9klpg0Ec/zBt/UYlfQ0/6IV 7ImzHoAW3KIuAYtcN6TFOKXoY7XZlOdd1eEjCmrwYGjWeXnvpw6Ch1e+MRGt45pKJB/9 01T7sVUKwDJ4Q7rrHRzUTmd+W21bxH/r0DkyJBarYn76PDgDjICtZOCQrAGBNPaWsX0L nuKrFnd2wXD38mtpPKgjalHOiwsz7aNyst1JRBeapCtpUX4kEo4/yxkd2udly4M5x4v1 buTD7BwrRIMiP62CdMFpNr6L45wfu9wtQBTH0HgaUT5F5gro8vfUKDwcpwEe40I+gWKH yObA== X-Gm-Message-State: AAQBX9flfD/1GbtZrxekudkB6OEc/KEJvImyYkbcnQcdkzUSN8CZKW64 dxn/K3MBdxUnbdnjAgP4wCviJAuaWij521W6MWjVLl9B5/ygm73v X-Received: by 2002:a81:ce07:0:b0:53d:2772:65d with SMTP id t7-20020a81ce07000000b0053d2772065dmr1561312ywi.9.1680616916859; Tue, 04 Apr 2023 07:01:56 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Linus Walleij Date: Tue, 4 Apr 2023 16:01:45 +0200 Message-ID: Subject: Re: [PATCH 0/2] Fix possible deadlocks for i8255 GPIO drivers To: William Breathitt Gray Cc: Bartosz Golaszewski , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-0.2 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 3, 2023 at 7:53=E2=80=AFPM William Breathitt Gray wrote: > The 104-dio-48e and 104-idi-48 drivers leverage regmap-irq to handle > IRQ. The default regmap locking utilizes spinlocks but this can result > in deadlocks for IRQ chips when running -rt kernels [0]. Enable > use_raw_spinlock for the regmap_config of these drivers to prevent such. > > [0] https://lore.kernel.org/all/1466065537-82027-1-git-send-email-mika.we= sterberg@linux.intel.com/ This looks reasonable. Reviewed-by: Linus Walleij Yours, Linus Walleij