From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42372 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932387AbeCSJKL (ORCPT ); Mon, 19 Mar 2018 05:10:11 -0400 Subject: Patch "drivers/perf: arm_pmu: handle no platform_device" has been added to the 4.4-stable tree To: mark.rutland@arm.com, alexander.levin@microsoft.com, gregkh@linuxfoundation.org, jeremy.linton@arm.com, will.deacon@arm.com Cc: , From: Date: Mon, 19 Mar 2018 10:09:10 +0100 Message-ID: <1521450550251213@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drivers/perf: arm_pmu: handle no platform_device to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drivers-perf-arm_pmu-handle-no-platform_device.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Mon Mar 19 09:58:12 CET 2018 From: Mark Rutland Date: Tue, 11 Apr 2017 09:39:49 +0100 Subject: drivers/perf: arm_pmu: handle no platform_device From: Mark Rutland [ Upstream commit 7654137071fa706e5c91f4f27bc2a5cd7e435a9b ] In armpmu_dispatch_irq() we look at arm_pmu::plat_device to acquire platdata, so that we can defer to platform-specific IRQ handling, required on some 32-bit parts. With the advent of ACPI we won't always have a platform_device, and so we must avoid trying to dereference fields from it. This patch fixes up armpmu_dispatch_irq() to avoid doing so, introducing a new armpmu_get_platdata() helper. Signed-off-by: Mark Rutland Tested-by: Jeremy Linton Cc: Will Deacon Signed-off-by: Will Deacon Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/perf/arm_pmu.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -321,10 +321,16 @@ validate_group(struct perf_event *event) return 0; } +static struct arm_pmu_platdata *armpmu_get_platdata(struct arm_pmu *armpmu) +{ + struct platform_device *pdev = armpmu->plat_device; + + return pdev ? dev_get_platdata(&pdev->dev) : NULL; +} + static irqreturn_t armpmu_dispatch_irq(int irq, void *dev) { struct arm_pmu *armpmu; - struct platform_device *plat_device; struct arm_pmu_platdata *plat; int ret; u64 start_clock, finish_clock; @@ -336,8 +342,8 @@ static irqreturn_t armpmu_dispatch_irq(i * dereference. */ armpmu = *(void **)dev; - plat_device = armpmu->plat_device; - plat = dev_get_platdata(&plat_device->dev); + + plat = armpmu_get_platdata(armpmu); start_clock = sched_clock(); if (plat && plat->handle_irq) Patches currently in stable-queue which might be from mark.rutland@arm.com are queue-4.4/drivers-perf-arm_pmu-handle-no-platform_device.patch