From patchwork Thu Dec 10 19:25:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11966057 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=-13.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 3C5E1C4361B for ; Thu, 10 Dec 2020 19:42:19 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D38DF23D3C for ; Thu, 10 Dec 2020 19:42:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D38DF23D3C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 321536EB1A; Thu, 10 Dec 2020 19:42:18 +0000 (UTC) Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1425A6EB17; Thu, 10 Dec 2020 19:42:17 +0000 (UTC) Message-Id: <20201210192536.118432146@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1607629334; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=dqmaBUU1aX3t41xhFMZZXhwmlvXhIHW8LZkxAL3qIuw=; b=h/TAwStAiTk4XvWiKPBPyDEOx218hZJC1vmF2rxVMRIvmco9q+UXf8EllPz4AjaFdOly7G LH+a53gOb/6x23hHUexy7zt6RJrXCLvlfH0RT7UmulMioZYuYNOHYckgeF+NjT2uTUeh+Y x4QOtIuHWxwLs6LKhedv+5hufAepZeedXGgORll6jDA+oynwB+JjiqXx/tgkxTCP8dbJ6L eWUOoe8IS6Z7h2dgCBQQBehNHm1Tfe56GXWt3TBc5qz2bsl6Xo6wT+1/DTPysSy3XD7/6K p0j9T2Hw/f1US+iZCI2FQmyJpu2ijKWYz9OMLgGwEfvXwTDnGAF9V1bHZmS/0A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1607629334; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=dqmaBUU1aX3t41xhFMZZXhwmlvXhIHW8LZkxAL3qIuw=; b=njYD6xBoyWobXQbQRXgtO58qqL+V8jLaqaWB6hUvHzVko4O9Y0w527+7oT5RC78ucYDSLL sPAJGjvbV9zCgIAw== Date: Thu, 10 Dec 2020 20:25:36 +0100 From: Thomas Gleixner To: LKML MIME-Version: 1.0 Subject: [Intel-gfx] [patch 00/30] genirq: Treewide hunt for irq descriptor abuse and assorted fixes X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Karthikeyan Mitran , Peter Zijlstra , Catalin Marinas , Linus Walleij , dri-devel@lists.freedesktop.org, Chris Wilson , "James E.J. Bottomley" , Saeed Mahameed , netdev@vger.kernel.org, Will Deacon , Michal Simek , linux-s390@vger.kernel.org, afzal mohammed , Lorenzo Pieralisi , Dave Jiang , xen-devel@lists.xenproject.org, Leon Romanovsky , linux-rdma@vger.kernel.org, Marc Zyngier , Helge Deller , Russell King , Christian Borntraeger , linux-pci@vger.kernel.org, Jakub Kicinski , Heiko Carstens , Wambui Karuga , Allen Hubbe , Juergen Gross , Rob Herring , David Airlie , linux-gpio@vger.kernel.org, Stefano Stabellini , Bjorn Helgaas , Lee Jones , linux-arm-kernel@lists.infradead.org, Boris Ostrovsky , linux-parisc@vger.kernel.org, Hou Zhiqiang , Tariq Toukan , Jon Mason , linux-ntb@googlegroups.com, intel-gfx@lists.freedesktop.org, "David S. Miller" Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" A recent request to export kstat_irqs() pointed to a copy of the same in the i915 code, which made me look for further usage of irq descriptors in drivers. The usage in drivers ranges from creative to broken in all colours. irqdesc.h clearly says that this is core functionality and the fact C does not allow full encapsulation is not a justification to fiddle with it just because. It took us a lot of effort to make the core functionality provide what drivers need. If there is a shortcoming, it's not asked too much to talk to the relevant maintainers instead of going off and fiddling with the guts of interrupt descriptors and often enough without understanding lifetime and locking rules. As people insist on not respecting boundaries, this series cleans up the (ab)use and at the end removes the export of irq_to_desc() to make it at least harder. All legitimate users of this are built in. While at it I stumbled over some other oddities related to interrupt counting and cleaned them up as well. The series applies on top of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core and is also available from git: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git genirq Thanks, tglx --- arch/alpha/kernel/sys_jensen.c | 2 arch/arm/kernel/smp.c | 2 arch/parisc/kernel/irq.c | 7 arch/s390/kernel/irq.c | 2 arch/x86/kernel/topology.c | 1 arch/arm64/kernel/smp.c | 2 drivers/gpu/drm/i915/display/intel_lpe_audio.c | 4 drivers/gpu/drm/i915/i915_irq.c | 34 +++ drivers/gpu/drm/i915/i915_pmu.c | 18 - drivers/gpu/drm/i915/i915_pmu.h | 8 drivers/mfd/ab8500-debugfs.c | 16 - drivers/net/ethernet/mellanox/mlx4/en_cq.c | 8 drivers/net/ethernet/mellanox/mlx4/en_rx.c | 6 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 3 drivers/net/ethernet/mellanox/mlx5/core/en.h | 2 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c | 6 drivers/ntb/msi.c | 4 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 8 drivers/pci/controller/pcie-xilinx-nwl.c | 8 drivers/pinctrl/nomadik/pinctrl-nomadik.c | 3 drivers/xen/events/events_base.c | 172 +++++++++++-------- drivers/xen/evtchn.c | 34 --- include/linux/interrupt.h | 1 include/linux/irq.h | 7 include/linux/irqdesc.h | 40 +--- include/linux/kernel_stat.h | 1 kernel/irq/irqdesc.c | 42 ++-- kernel/irq/manage.c | 37 ++++ kernel/irq/proc.c | 5 30 files changed, 263 insertions(+), 222 deletions(-)