From owner-freebsd-hackers@freebsd.org Tue Sep 11 05:19:37 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7419B10A94B3 for ; Tue, 11 Sep 2018 05:19:37 +0000 (UTC) (envelope-from yuripv@yuripv.net) Received: from wout2-smtp.messagingengine.com (wout2-smtp.messagingengine.com [64.147.123.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1304085AA0 for ; Tue, 11 Sep 2018 05:19:36 +0000 (UTC) (envelope-from yuripv@yuripv.net) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.west.internal (Postfix) with ESMTP id 26341620 for ; Tue, 11 Sep 2018 01:19:29 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Tue, 11 Sep 2018 01:19:29 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yuripv.net; h= content-transfer-encoding:content-type:date:from:message-id :mime-version:subject:to:x-me-sender:x-me-sender:x-sasl-enc; s= fm2; bh=77spYVK6iicScPy3G494ohXqhZvKvINxMyOX+q1NDRs=; b=f6HrRhUX NRMtnA+hBEpmBUgs8B8Npyd3ekirwHCUDFdd7dLQoMeMlgn0o39oA94aKyCiobu0 vAETxYR9XOuXGjWOuBdricF7S/9R0lzzoi4RZ+oHEQkzrjmZx7aHadj5az3hW4sG 73owc3QjoxqLxsMOt0pkudr3e9mIEbHQKk0KrH1OMaDUxcZj8RD+g8kCyWw4r8nm jNgo217MpswIz/MvPaF0e2EhXhOAYAjPFOu835YEyakDCC6qdjIho5v4ug9YZfZE pkWRo6ZO7Ap13MUB8dyAcVpFs2mtWy9dC+lJwJJp6hxJCWV0wl8XzerrHXkfNHyd 4DdTz/5jpJtajQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-sender :x-me-sender:x-sasl-enc; s=fm3; bh=77spYVK6iicScPy3G494ohXqhZvKv INxMyOX+q1NDRs=; b=X47FErYzZ1cgL7WzuI8EFyMt21G5lK/x32eqiriE0USA+ AqCaUo9bPH0wYyuxFCXEQmSXWuDRF2I/SBPFz2tn/woftSg1BpwsBrT/gvAnnYVe o82aQdLd2c/15ucEFrejwCVlWp/JqGud0EPX6pu1BkMp6bx82Gj/gWcgXrlk9DrH nO8wq1rmnI44VCqIYRDGbvvybIc+PhePR6zTQ34s0JUQ9+6fJvv/ndVdJcMbBfxW f42IW8Uv0jdxubPHEBjilvnVV/2WLo47HYhKe/tVmx8HUxF339Tw68WfSuDW/dIh SAEJrVHDup0D9p7un3cfchDNAyJ+wd/Nn3Pzj30sw== X-ME-Proxy: X-ME-Sender: Received: from [192.168.1.2] (unknown [178.34.113.240]) by mail.messagingengine.com (Postfix) with ESMTPA id 6D615E4041 for ; Tue, 11 Sep 2018 01:19:27 -0400 (EDT) To: freebsd-hackers From: Yuri Pankov Subject: ACPI GPE handler: mtx_lock() by idle thread Message-ID: <475afc8c-d0ad-ead2-e75e-bca873977c2d@yuripv.net> Date: Tue, 11 Sep 2018 08:19:26 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Sep 2018 05:19:37 -0000 I have the panic shown below with a simple device driver that installs GPE handler in the attach routine, and does nothing else than waiting for GPEs. No matter if I try to handle it sync (calling SPIBUS_TRANSFER() from the handler), or async (calling taskqueue_enqueue()), once one of those functions called from the handler does mtx_lock(), it panics. Any hints? panic: mtx_lock() by idle thread 0xfffff800035bb000 on sleep mutex spi1 @ /home/yuri/ws/mbp/sys/dev/intel/spi.c:382 cpuid = 0 time = 1536642645 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00764761b0 vpanic() at vpanic+0x1a3/frame 0xfffffe0076476210 panic() at panic+0x43/frame 0xfffffe0076476270 __mtx_lock_flags() at __mtx_lock_flags+0x15a/frame 0xfffffe00764762c0 intelspi_transfer() at intelspi_transfer+0x3d/frame 0xfffffe0076476310 spimbp_gpe_handler() at spimbp_gpe_handler+0x102/frame 0xfffffe0076476580 AcpiEvGpeDispatch() at AcpiEvGpeDispatch+0xc0/frame 0xfffffe00764765b0 AcpiEvDetectGpe() at AcpiEvDetectGpe+0x10a/frame 0xfffffe0076476600 AcpiEvGpeDetect() at AcpiEvGpeDetect+0x323/frame 0xfffffe0076476670 AcpiEvSciXruptHandler() at AcpiEvSciXruptHandler+0x1e/frame 0xfffffe00764766a0 acpi_intr_handler() at acpi_intr_handler+0x18/frame 0xfffffe00764766b0 intr_event_handle() at intr_event_handle+0xcb/frame 0xfffffe0076476700 intr_execute_handlers() at intr_execute_handlers+0x58/frame 0xfffffe0076476730 lapic_handle_intr() at lapic_handle_intr+0x5f/frame 0xfffffe0076476750 Xapic_isr1() at Xapic_isr1+0xd9/frame 0xfffffe0076476750 --- interrupt, rip = 0xffffffff80461191, rsp = 0xfffffe0076476820, rbp = 0xfffffe0076476860 --- acpi_cpu_idle() at acpi_cpu_idle+0x2a1/frame 0xfffffe0076476860 cpu_idle_acpi() at cpu_idle_acpi+0x3f/frame 0xfffffe0076476880 cpu_idle() at cpu_idle+0xa7/frame 0xfffffe00764768a0 sched_idletd() at sched_idletd+0x517/frame 0xfffffe0076476970 fork_exit() at fork_exit+0x84/frame 0xfffffe00764769b0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00764769b0 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic