From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Cpufreq regression in next-20161207 Date: Wed, 7 Dec 2016 20:56:41 -0800 Message-ID: <20161208045640.GB4264@atomide.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from muru.com ([72.249.23.125]:53498 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932578AbcLHE4q (ORCPT ); Wed, 7 Dec 2016 23:56:46 -0500 Content-Disposition: inline Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: "Rafael J. Wysocki" , Viresh Kumar Cc: Stephen Boyd , Dave Gerlach , Nishanth Menon , Tero Kristo , linux-pm@vger.kernel.org, linux-omap@vger.kernel.org Hi, Looks like commit ef3caabee969 ("PM / OPP: Don't assume platform doesn't have regulators") caused a regression in Linux next-20161207 for at least omap4 pandaboard. We now hit kernel BUG at drivers/cpufreq/cpufreq.c:1235. Any ideas? Regards, Tony 8< ---------------------- kernel BUG at drivers/cpufreq/cpufreq.c:1235! Internal error: Oops - BUG: 0 [#1] SMP ARM Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc8-next-20161207 #290 Hardware name: Generic OMAP4 (Flattened Device Tree) task: ee868000 task.stack: ee86c000 PC is at cpufreq_online+0x5f0/0x648 LR is at __cpufreq_driver_target+0x248/0x4c4 pc : [] lr : [] psr: a0000113 sp : ee86dd40 ip : 00000000 fp : c1317ea0 r10: 00000001 r9 : c156cd70 r8 : c140322c r7 : ee8ae204 r6 : 00000000 r5 : 00000000 r4 : ee8ae200 r3 : 00000001 r2 : 00000001 r1 : 80000113 r0 : ffffffea Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 8020404a DAC: 00000051 Process swapper/0 (pid: 1, stack limit = 0xee86c220) Stack: (0xee86dd40 to 0xee86e000) dd40: 00000000 00000000 ee8ae2b4 ee8ae204 20000113 00000000 ee82bc00 00000000 dd60: ef7aa050 c150bb5c ef7aa050 c150be9c 00000000 00000000 00000000 c0a5729c dd80: c150bbc0 c14f0014 c150bb5c ef7aa050 c150be9c c07ecce4 c156d484 ee806f58 dda0: ee9f0fb4 00000000 00000000 c150bee4 c156cd70 c0a561c8 00000000 c0a59110 ddc0: ee8bf040 eeeb9400 00000000 c0a595d4 eeeb9410 ffffffed c150be9c fffffdfb dde0: c150be9c c07efe10 eeeb9410 c1569c5c 00000000 00000000 c150be9c c07ee464 de00: 00000000 ee86de38 c07ee5c0 00000001 c1569c38 00000000 00000000 c07ec9bc de20: ee806e6c ee8bd238 eeeb9410 eeeb9444 c14eff88 c07ee15c eeeb9410 00000001 de40: eeeb9410 eeeb9418 eeeb9410 c14eff88 00000000 c07ed798 eeeb9418 c14efde8 de60: eeeb9410 c07ebb7c c1312ba8 c05a1560 eeeb9400 eeeb9400 00000000 eeeb9400 de80: c1312ba8 c12a7834 eeeb9410 00000138 00000007 c07efb8c eeeb9400 ee86dec8 dea0: c1312ba8 c12a7834 00000000 c07f0568 00000000 ef7c8984 c1312ba8 c12a7834 dec0: 00000000 c127f9c0 00000000 00000000 c106a354 ffffffff 00000000 00000000 dee0: 00000000 00000001 00000000 00000000 00000000 00000000 c127f928 c127f938 df00: ffffe000 c0301e9c 00000000 c047321c c0d0b0c0 ee845a00 00000000 c1434064 df20: c10d75ec c0d1d0c0 00000138 c035c13c c105c458 c10d5d8c 00000000 00000006 df40: 00000006 c0f83374 c143404c c151d000 c151d000 00000006 c151d000 c151d000 df60: c1312ba8 c12a7834 c12a783c c1200dc4 00000006 00000006 00000000 c12005ac df80: 00000000 00000000 c0c08f10 00000000 00000000 00000000 00000000 00000000 dfa0: 00000000 c0c08f18 00000000 c0307d38 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 2eeaeab0 aae2378a [] (cpufreq_online) from [] (cpufreq_add_dev+0xbc/0xcc) [] (cpufreq_add_dev) from [] (subsys_interface_register+0x90/0xcc) [] (subsys_interface_register) from [] (cpufreq_register_driver+0x15c/0x1dc) [] (cpufreq_register_driver) from [] (dt_cpufreq_probe+0x88/0x10c) [] (dt_cpufreq_probe) from [] (platform_drv_probe+0x50/0xb0) [] (platform_drv_probe) from [] (driver_probe_device+0x228/0x2c8) [] (driver_probe_device) from [] (bus_for_each_drv+0x60/0x94) [] (bus_for_each_drv) from [] (__device_attach+0xb0/0x114) [] (__device_attach) from [] (bus_probe_device+0x84/0x8c) [] (bus_probe_device) from [] (device_add+0x420/0x5b0) [] (device_add) from [] (platform_device_add+0x10c/0x220) [] (platform_device_add) from [] (platform_device_register_full+0xf8/0x114) [] (platform_device_register_full) from [] (cpufreq_dt_platdev_init+0x88/0x98) [] (cpufreq_dt_platdev_init) from [] (do_one_initcall+0x44/0x16c) [] (do_one_initcall) from [] (kernel_init_freeable+0x15c/0x1ec) [] (kernel_init_freeable) from [] (kernel_init+0x8/0x114) [] (kernel_init) from [] (ret_from_fork+0x14/0x3c) Code: e34c0106 e22aa001 ebe5e699 eafffef1 (e7f001f2) ---[ end trace 78633199f00384ae ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 2.439239] CPU0: stopping CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D 4.9.0-rc8-next-20161207 #290 Hardware name: Generic OMAP4 (Flattened Device Tree) [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0x88/0x9c) [] (dump_stack) from [] (handle_IPI+0x174/0x194) [] (handle_IPI) from [] (gic_handle_irq+0x94/0x98) [] (gic_handle_irq) from [] (__irq_svc+0x6c/0x90) Exception stack(0xc1401f40 to 0xc1401f88) 1f40: 00000001 00000000 00000000 c031bae0 c1400000 c1403094 c1403034 c1317ed0 1f60: c1401f98 00000000 00000000 00000000 2e497000 c1401f90 c0308764 c0308768 1f80: 60000113 ffffffff [] (__irq_svc) from [] (arch_cpu_idle+0x38/0x3c) [] (arch_cpu_idle) from [] (do_idle+0x164/0x1f8) [] (do_idle) from [] (cpu_startup_entry+0x18/0x1c) [] (cpu_startup_entry) from [] (start_kernel+0x380/0x38c) [] (start_kernel) from [<8020807c>] (0x8020807c) ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b