Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754569AbcC0HmI (ORCPT ); Sun, 27 Mar 2016 03:42:08 -0400 Received: from mail-oi0-f42.google.com ([209.85.218.42]:36074 "EHLO mail-oi0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752974AbcC0Hl5 (ORCPT ); Sun, 27 Mar 2016 03:41:57 -0400 MIME-Version: 1.0 In-Reply-To: <56F3FB13.9040505@intel.com> References: <20160324155840.50474b98@xhacker> <56F3A0B7.4050509@samsung.com> <20160324162449.29c9cf78@xhacker> <56F3A88F.50603@samsung.com> <56F3E77D.7030201@intel.com> <20160324140307.GH12245@odux.rfo.atmel.com> <56F3FB13.9040505@intel.com> From: Anand Moon Date: Sun, 27 Mar 2016 13:11:36 +0530 Message-ID: Subject: Re: Warnings for invalid VDD (sdhci-s3c) To: Adrian Hunter Cc: Krzysztof Kozlowski , Jisheng Zhang , Jaehoon Chung , Ulf Hansson , "Ivan T. Ivanov" , linux-mmc@vger.kernel.org, Linux Kernel , "linux-samsung-soc@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 25789 Lines: 514 Hi All, On 24 March 2016 at 20:04, Adrian Hunter wrote: > On 24/03/16 16:03, Ludovic Desroches wrote: >> Hi, >> >> On Thu, Mar 24, 2016 at 03:11:25PM +0200, Adrian Hunter wrote: >>> On 24/03/16 10:42, Krzysztof Kozlowski wrote: >>>> On 24.03.2016 17:24, Jisheng Zhang wrote: >>>>> Hi, >>>>> >>>>> On Thu, 24 Mar 2016 17:09:27 +0900 Jaehoon Chung wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> On 03/24/2016 04:58 PM, Jisheng Zhang wrote: >>>>>>> Hi, >>>>>>> >>>>>>> On Thu, 24 Mar 2016 16:28:56 +0900 Krzysztof Kozlowski wrote: >>>>>>> >>>>>>>> Hi, >>>>>>>> >>>>>>>> After 918f4cbd4340 ("mmc: sdhci: restore behavior when setting VDD via >>>>>>>> external regulator") On Trats2 board I see warnings for invalid VDD >>>>>>>> value (2.8V): >>>>>>>> >>>>>>>> [ 3.119656] ------------[ cut here ]------------ >>>>>>>> [ 3.119666] WARNING: CPU: 3 PID: 90 at >>>>>>>> ../drivers/mmc/host/sdhci.c:1234 sdhci_do_set_ios+0x4cc/0x5e0 >>>>>>>> [ 3.119669] mmc0: Invalid vdd 0x10 >>>>>>> >>>>>>> Per my understanding, the wrong vdd indicates a wrong ocr, what's the voltage of >>>>>>> this host's vmmc regulator? >>>>>> >>>>>> As i know, it's fixed-voltage with gpio on trats2. It's 2.8V. >>>>>> I didn't check this entirely..need to check ocr value. >>>>>> >>>>> >>>>> I may know the reason. the vmmc is 2.8v, then mmc_regulator_get_supply() convert >>>>> the value to a ocr as 0x10. The key here is that the 2.8v is invalid in SDHCI >>>>> case and isn't accepted by current sdhci driver. >>>> >>>> Yeah, I already wrote that. It is the part of the warning and my email. >>>> Our regulator is fixed at 2.8 which is 0x10. :) >>>> >>>>> I dunno the elegant solution to handle this case, let's wait for sdhci maintainers >>>>> idea. >>>> >>>> Hmm... >>> >>> I haven't tested it, but what about this: >>> >>> From: Adrian Hunter >>> Date: Thu, 24 Mar 2016 14:29:24 +0200 >>> Subject: [PATCH] mmc: sdhci: Fix regression setting power on Trats2 board >>> >>> Several commits relating to setting power have been introducing >>> problems by putting driver-specific rules into generic SDHCI code. >>> >> >> I remember that I have acked this patch and I still believe it is not >> driver-specific code. > > It depends how you look at it. I decided that since the previous code had > been there for a while (since 3.19), it should stay the default. > > I agree you could look at it differently. > >> >> Without this patch, if a regulator is used, we set this regulator and we >> write SDHCI_POWER_ON to SDHCI_POWER_CONTROL so 0x01. In the >> specification, it is said: >> 'If an unsupported voltage is selected, the Host System shall not supply >> SD Bus voltage'. >> Valid voltage are 111b for 3.3V, 110b for 3.0V and 101b for 1.8V. 0 is >> seen as an invalid voltage. > > Again, it depends how you look at it. From my point of view, the > specification doesn't cover external regulators so you can't expect to know > what to put in the power control register. > >> >> If the controller strictly applies the specification then it won't perform >> the power on request. It's what happens with sdhci-pxav3 and >> sdhci-of-at91. > > So if I make the same change to sdhci-of-at91 as sdhci-pxav3, it will work > for you? > >> >> I don't care if the patch is reverted because I no more describe >> the regulators but I think the behavior with Jisheng's patch is the right >> one. Maybe more cases should be managed in the switch statement as >> suggested by Tobias. > > But always the possibility it won't work for some driver. > >> >> >>> Fix by adding a 'set_power' callback and restoring the default >>> behaviour prior to commit 918f4cbd4340. The desired behaviour >>> of commit 918f4cbd4340 is gotten by having sdhci-pxav3 provide >>> its own set_power callback. >>> >> >> Adding callbacks is the only way to solve all these quirks or >> interpretations of the specification. >> > > At least it means we can go forward. On My Odroid U3 with debug flags enable I am observing bellow deadlock. --------------------------------------------------------------------------------------------------------- [ 202.519524] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:617 [ 202.522364] in_atomic(): 1, irqs_disabled(): 128, pid: 100, name: mmcqd/0 [ 202.529129] 1 lock held by mmcqd/0/100: [ 202.529150] #0: (&(&host->lock)->rlock#2){-.-...}, at: [] sdhci_do_set_ios+0x1c/0x484 [ 202.529271] irq event stamp: 703530 [ 202.529291] hardirqs last enabled at (703529): [] _raw_spin_unlock_irqrestore+0x6c/0x74 [ 202.529343] hardirqs last disabled at (703530): [] _raw_spin_lock_irqsave+0x1c/0x84 [ 202.529384] softirqs last enabled at (703456): [] __do_softirq+0x244/0x2c0 [ 202.529438] softirqs last disabled at (703445): [] irq_exit+0xec/0x128 [ 202.529472] Preemption disabled at:[< (null)>] (null) [ 202.534415] [ 202.534449] CPU: 0 PID: 100 Comm: mmcqd/0 Not tainted 4.6.0-rc1-u3s #38 [ 202.534473] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 202.534544] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 202.534594] [] (show_stack) from [] (dump_stack+0x98/0xc4) [ 202.534639] [] (dump_stack) from [] (mutex_lock_nested+0x2c/0x4dc) [ 202.534685] [] (mutex_lock_nested) from [] (clk_prepare_lock+0x50/0xf8) [ 202.534726] [] (clk_prepare_lock) from [] (clk_round_rate+0x1c/0x58) [ 202.534773] [] (clk_round_rate) from [] (sdhci_s3c_set_clock+0x18c/0x1b0) [ 202.534819] [] (sdhci_s3c_set_clock) from [] (sdhci_cmu_set_clock+0x24/0x17c) [ 202.534860] [] (sdhci_cmu_set_clock) from [] (sdhci_do_set_ios+0x78/0x484) [ 202.534904] [] (sdhci_do_set_ios) from [] (sdhci_runtime_resume_host+0x60/0x114) [ 202.534957] [] (sdhci_runtime_resume_host) from [] (__rpm_callback+0x2c/0x60) [ 202.535000] [] (__rpm_callback) from [] (rpm_callback+0x54/0x80) [ 202.535041] [] (rpm_callback) from [] (rpm_resume+0x364/0x558) [ 202.535081] [] (rpm_resume) from [] (__pm_runtime_resume+0x60/0x8c) [ 202.535125] [] (__pm_runtime_resume) from [] (__mmc_claim_host+0x1b4/0x1f8) [ 202.535176] [] (__mmc_claim_host) from [] (mmc_sd_runtime_resume+0x20/0xac) [ 202.535220] [] (mmc_sd_runtime_resume) from [] (__rpm_callback+0x2c/0x60) [ 202.535259] [] (__rpm_callback) from [] (rpm_callback+0x54/0x80) [ 202.535299] [] (rpm_callback) from [] (rpm_resume+0x364/0x558) [ 202.535340] [] (rpm_resume) from [] (__pm_runtime_resume+0x60/0x8c) [ 202.535379] [] (__pm_runtime_resume) from [] (mmc_get_card+0x14/0x24) [ 202.535420] [] (mmc_get_card) from [] (mmc_blk_issue_rq+0x258/0x4f0) [ 202.535461] [] (mmc_blk_issue_rq) from [] (mmc_queue_thread+0xd0/0x1d8) [ 202.535513] [] (mmc_queue_thread) from [] (kthread+0xf4/0x10c) [ 202.535561] [] (kthread) from [] (ret_from_fork+0x14/0x24) [ 202.535624] [ 202.535893] ====================================================== [ 202.542059] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ] [ 202.548742] 4.6.0-rc1-u3s #38 Not tainted [ 202.552732] ------------------------------------------------------ [ 202.558902] mmcqd/0/100 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 202.565317] (prepare_lock){+.+...}, at: [] clk_prepare_lock+0x50/0xf8 [ 202.572695] [ 202.572695] and this task is already holding: [ 202.578510] (&(&host->lock)->rlock#2){-.-...}, at: [] sdhci_do_set_ios+0x1c/0x484 [ 202.586930] which would create a new lock dependency: [ 202.591964] (&(&host->lock)->rlock#2){-.-...} -> (prepare_lock){+.+...} [ 202.598650] [ 202.598650] but this new dependency connects a HARDIRQ-irq-safe lock: [ 202.606546] (&(&host->lock)->rlock#2){-.-...} [ 202.606546] ... which became HARDIRQ-irq-safe at: [ 202.614359] [] _raw_spin_lock+0x3c/0x74 [ 202.619219] [] sdhci_irq+0x1c/0x814 [ 202.623732] [] handle_irq_event_percpu+0x9c/0x150 [ 202.629461] [] handle_irq_event+0x38/0x5c [ 202.634495] [] handle_fasteoi_irq+0xd0/0x1a8 [ 202.639790] [] generic_handle_irq+0x24/0x34 [ 202.644998] [] __handle_domain_irq+0x7c/0xec [ 202.650293] [] gic_handle_irq+0x54/0x94 [ 202.655154] [] __irq_svc+0x58/0x98 [ 202.659581] [] arch_cpu_idle+0x24/0x3c [ 202.664354] [] arch_cpu_idle+0x24/0x3c [ 202.669128] [] cpu_startup_entry+0x1c8/0x24c [ 202.674423] [] start_kernel+0x39c/0x3a8 [ 202.679284] [<4000807c>] 0x4000807c [ 202.682933] [ 202.682933] to a HARDIRQ-irq-unsafe lock: [ 202.688399] (prepare_lock){+.+...} [ 202.688399] ... which became HARDIRQ-irq-unsafe at: [ 202.695429] ... [] mutex_trylock+0x130/0x250 [ 202.700637] [] clk_prepare_lock+0x10/0xf8 [ 202.705672] [] __clk_create_clk.part.13+0x4c/0x80 [ 202.711400] [] __of_clk_get_from_provider+0x88/0xf8 [ 202.717303] [] __of_clk_get_by_name+0xfc/0x114 [ 202.722771] [] clk_get+0x2c/0x5c [ 202.727024] [] devm_clk_get+0x3c/0x78 [ 202.731712] [] exynos_sysmmu_probe+0xe8/0x310 [ 202.737093] [] platform_drv_probe+0x4c/0xb0 [ 202.742301] [] driver_probe_device+0x20c/0x2b8 [ 202.747769] [] bus_for_each_drv+0x60/0x94 [ 202.752804] [] __device_attach+0xb4/0x118 [ 202.757838] [] bus_probe_device+0x88/0x90 [ 202.762873] [] device_add+0x370/0x570 [ 202.767560] [] of_platform_device_create_pdata+0x84/0xb8 [ 202.773896] [] exynos_iommu_of_setup+0x120/0x158 [ 202.779538] [] of_iommu_init+0x44/0x78 [ 202.784312] [] customize_machine+0x8/0x44 [ 202.789347] [] do_one_initcall+0x90/0x1dc [ 202.794381] [] kernel_init_freeable+0x158/0x1e8 [ 202.799936] [] kernel_init+0x8/0x114 [ 202.804537] [] ret_from_fork+0x14/0x24 [ 202.809313] [ 202.809313] other info that might help us debug this: [ 202.809313] [ 202.817299] Possible interrupt unsafe locking scenario: [ 202.817299] [ 202.824068] CPU0 CPU1 [ 202.828581] ---- ---- [ 202.833094] lock(prepare_lock); [ 202.836394] local_irq_disable(); [ 202.842295] lock(&(&host->lock)->rlock#2); [ 202.849065] lock(prepare_lock); [ 202.854881] [ 202.857484] lock(&(&host->lock)->rlock#2); [ 202.861912] [ 202.861912] *** DEADLOCK *** [ 202.861912] [ 202.867820] 1 lock held by mmcqd/0/100: [ 202.871634] #0: (&(&host->lock)->rlock#2){-.-...}, at: [] sdhci_do_set_ios+0x1c/0x484 [ 202.880489] [ 202.880489] the dependencies between HARDIRQ-irq-safe lock and the holding lock: [ 202.888106] -> (&(&host->lock)->rlock#2){-.-...} ops: 69588 { [ 202.893768] IN-HARDIRQ-W at: [ 202.896893] [] _raw_spin_lock+0x3c/0x74 [ 202.903316] [] sdhci_irq+0x1c/0x814 [ 202.909392] [] handle_irq_event_percpu+0x9c/0x150 [ 202.916683] [] handle_irq_event+0x38/0x5c [ 202.923280] [] handle_fasteoi_irq+0xd0/0x1a8 [ 202.930137] [] generic_handle_irq+0x24/0x34 [ 202.936908] [] __handle_domain_irq+0x7c/0xec [ 202.943765] [] gic_handle_irq+0x54/0x94 [ 202.950188] [] __irq_svc+0x58/0x98 [ 202.956177] [] arch_cpu_idle+0x24/0x3c [ 202.962513] [] arch_cpu_idle+0x24/0x3c [ 202.968850] [] cpu_startup_entry+0x1c8/0x24c [ 202.975707] [] start_kernel+0x39c/0x3a8 [ 202.982130] [<4000807c>] 0x4000807c [ 202.987340] IN-SOFTIRQ-W at: [ 202.990463] [] _raw_spin_lock_irqsave+0x48/0x84 [ 202.997581] [] sdhci_tasklet_finish+0x18/0x1f4 [ 203.004611] [] tasklet_action+0xac/0x164 [ 203.011122] [] __do_softirq+0x168/0x2c0 [ 203.017544] [] irq_exit+0xec/0x128 [ 203.023534] [] __handle_domain_irq+0x80/0xec [ 203.030391] [] gic_handle_irq+0x54/0x94 [ 203.036814] [] __irq_svc+0x58/0x98 [ 203.042804] [] arch_cpu_idle+0x24/0x3c [ 203.049140] [] arch_cpu_idle+0x24/0x3c [ 203.055476] [] cpu_startup_entry+0x1c8/0x24c [ 203.062334] [] start_kernel+0x39c/0x3a8 [ 203.068756] [<4000807c>] 0x4000807c [ 203.073966] INITIAL USE at: [ 203.077003] [] _raw_spin_lock_irqsave+0x48/0x84 [ 203.084033] [] sdhci_do_set_ios+0x1c/0x484 [ 203.090630] [] sdhci_runtime_resume_host+0x60/0x114 [ 203.098008] [] __rpm_callback+0x2c/0x60 [ 203.104345] [] rpm_callback+0x20/0x80 [ 203.110507] [] rpm_resume+0x364/0x558 [ 203.116670] [] __pm_runtime_resume+0x60/0x8c [ 203.123440] [] __mmc_claim_host+0x1b4/0x1f8 [ 203.130124] [] mmc_start_host+0x34/0xa8 [ 203.136461] [] mmc_add_host+0x5c/0x80 [ 203.142624] [] sdhci_add_host+0x8c4/0xdec [ 203.149133] [] sdhci_s3c_probe+0x4c4/0x568 [ 203.155730] [] platform_drv_probe+0x4c/0xb0 [ 203.162414] [] driver_probe_device+0x20c/0x2b8 [ 203.169358] [] __driver_attach+0xc0/0xc4 [ 203.175781] [] bus_for_each_dev+0x68/0x9c [ 203.182291] [] bus_add_driver+0x1a0/0x218 [ 203.188801] [] driver_register+0x78/0xf8 [ 203.195224] [] do_one_initcall+0x90/0x1dc [ 203.201734] [] kernel_init_freeable+0x158/0x1e8 [ 203.208765] [] kernel_init+0x8/0x114 [ 203.214841] [] ret_from_fork+0x14/0x24 [ 203.221091] } [ 203.222740] ... key at: [] __key.32364+0x0/0x8 [ 203.228556] ... acquired at: [ 203.231506] [] lock_acquire+0xa8/0xd0 [ 203.236280] [] mutex_lock_nested+0x78/0x4dc [ 203.241575] [] clk_prepare_lock+0x50/0xf8 [ 203.246696] [] clk_round_rate+0x1c/0x58 [ 203.251643] [] sdhci_s3c_set_clock+0x18c/0x1b0 [ 203.257199] [] sdhci_cmu_set_clock+0x24/0x17c [ 203.262667] [] sdhci_do_set_ios+0x78/0x484 [ 203.267875] [] sdhci_runtime_resume_host+0x60/0x114 [ 203.273864] [] __rpm_callback+0x2c/0x60 [ 203.278812] [] rpm_callback+0x54/0x80 [ 203.283586] [] rpm_resume+0x364/0x558 [ 203.288359] [] __pm_runtime_resume+0x60/0x8c [ 203.293741] [] __mmc_claim_host+0x1b4/0x1f8 [ 203.299036] [] mmc_sd_runtime_resume+0x20/0xac [ 203.304591] [] __rpm_callback+0x2c/0x60 [ 203.309539] [] rpm_callback+0x54/0x80 [ 203.314313] [] rpm_resume+0x364/0x558 [ 203.319087] [] __pm_runtime_resume+0x60/0x8c [ 203.324468] [] mmc_get_card+0x14/0x24 [ 203.329243] [] mmc_blk_issue_rq+0x258/0x4f0 [ 203.334538] [] mmc_queue_thread+0xd0/0x1d8 [ 203.339745] [] kthread+0xf4/0x10c [ 203.344172] [] ret_from_fork+0x14/0x24 [ 203.349033] [ 203.350509] [ 203.350509] the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: [ 203.358904] -> (prepare_lock){+.+...} ops: 5285 { [ 203.363531] HARDIRQ-ON-W at: [ 203.366654] [] mutex_trylock+0x130/0x250 [ 203.373164] [] clk_prepare_lock+0x10/0xf8 [ 203.379761] [] __clk_create_clk.part.13+0x4c/0x80 [ 203.387052] [] __of_clk_get_from_provider+0x88/0xf8 [ 203.394517] [] __of_clk_get_by_name+0xfc/0x114 [ 203.401548] [] clk_get+0x2c/0x5c [ 203.407363] [] devm_clk_get+0x3c/0x78 [ 203.413613] [] exynos_sysmmu_probe+0xe8/0x310 [ 203.420557] [] platform_drv_probe+0x4c/0xb0 [ 203.427327] [] driver_probe_device+0x20c/0x2b8 [ 203.434358] [] bus_for_each_drv+0x60/0x94 [ 203.440955] [] __device_attach+0xb4/0x118 [ 203.447552] [] bus_probe_device+0x88/0x90 [ 203.454149] [] device_add+0x370/0x570 [ 203.460399] [] of_platform_device_create_pdata+0x84/0xb8 [ 203.468297] [] exynos_iommu_of_setup+0x120/0x158 [ 203.475501] [] of_iommu_init+0x44/0x78 [ 203.481838] [] customize_machine+0x8/0x44 [ 203.488434] [] do_one_initcall+0x90/0x1dc [ 203.495031] [] kernel_init_freeable+0x158/0x1e8 [ 203.502149] [] kernel_init+0x8/0x114 [ 203.508312] [] ret_from_fork+0x14/0x24 [ 203.514650] SOFTIRQ-ON-W at: [ 203.517773] [] mutex_trylock+0x130/0x250 [ 203.524283] [] clk_prepare_lock+0x10/0xf8 [ 203.530880] [] __clk_create_clk.part.13+0x4c/0x80 [ 203.538171] [] __of_clk_get_from_provider+0x88/0xf8 [ 203.545636] [] __of_clk_get_by_name+0xfc/0x114 [ 203.552666] [] clk_get+0x2c/0x5c [ 203.558482] [] devm_clk_get+0x3c/0x78 [ 203.564732] [] exynos_sysmmu_probe+0xe8/0x310 [ 203.571676] [] platform_drv_probe+0x4c/0xb0 [ 203.578446] [] driver_probe_device+0x20c/0x2b8 [ 203.585477] [] bus_for_each_drv+0x60/0x94 [ 203.592074] [] __device_attach+0xb4/0x118 [ 203.598671] [] bus_probe_device+0x88/0x90 [ 203.605267] [] device_add+0x370/0x570 [ 203.611517] [] of_platform_device_create_pdata+0x84/0xb8 [ 203.619416] [] exynos_iommu_of_setup+0x120/0x158 [ 203.626620] [] of_iommu_init+0x44/0x78 [ 203.632956] [] customize_machine+0x8/0x44 [ 203.639553] [] do_one_initcall+0x90/0x1dc [ 203.646150] [] kernel_init_freeable+0x158/0x1e8 [ 203.653268] [] kernel_init+0x8/0x114 [ 203.659431] [] ret_from_fork+0x14/0x24 [ 203.665768] INITIAL USE at: [ 203.668805] [] mutex_trylock+0xf8/0x250 [ 203.675142] [] clk_prepare_lock+0x10/0xf8 [ 203.681651] [] __clk_create_clk.part.13+0x4c/0x80 [ 203.688856] [] clk_register+0x1b8/0x5f0 [ 203.695192] [] clk_register_fixed_rate_with_accuracy+0x94/0xc4 [ 203.703525] [] clk_register_fixed_rate+0x18/0x20 [ 203.710642] [] samsung_clk_register_fixed_rate+0x4c/0xb8 [ 203.718455] [] samsung_clk_of_register_fixed_ext+0x90/0x98 [ 203.726440] [] exynos4_clk_init+0x88/0x5b0 [ 203.733037] [] of_clk_init+0x14c/0x1d8 [ 203.739287] [] time_init+0x24/0x2c [ 203.745189] [] start_kernel+0x260/0x3a8 [ 203.751526] [<4000807c>] 0x4000807c [ 203.756647] } [ 203.758296] ... key at: [] prepare_lock+0x3c/0x54 [ 203.764373] ... acquired at: [ 203.767322] [] lock_acquire+0xa8/0xd0 [ 203.772096] [] mutex_lock_nested+0x78/0x4dc [ 203.777391] [] clk_prepare_lock+0x50/0xf8 [ 203.782512] [] clk_round_rate+0x1c/0x58 [ 203.787460] [] sdhci_s3c_set_clock+0x18c/0x1b0 [ 203.793015] [] sdhci_cmu_set_clock+0x24/0x17c [ 203.798484] [] sdhci_do_set_ios+0x78/0x484 [ 203.803691] [] sdhci_runtime_resume_host+0x60/0x114 [ 203.809680] [] __rpm_callback+0x2c/0x60 [ 203.814628] [] rpm_callback+0x54/0x80 [ 203.819402] [] rpm_resume+0x364/0x558 [ 203.824176] [] __pm_runtime_resume+0x60/0x8c [ 203.829558] [] __mmc_claim_host+0x1b4/0x1f8 [ 203.834852] [] mmc_sd_runtime_resume+0x20/0xac [ 203.840408] [] __rpm_callback+0x2c/0x60 [ 203.845355] [] rpm_callback+0x54/0x80 [ 203.850129] [] rpm_resume+0x364/0x558 [ 203.854903] [] __pm_runtime_resume+0x60/0x8c [ 203.860285] [] mmc_get_card+0x14/0x24 [ 203.865059] [] mmc_blk_issue_rq+0x258/0x4f0 [ 203.870354] [] mmc_queue_thread+0xd0/0x1d8 [ 203.875562] [] kthread+0xf4/0x10c [ 203.879988] [] ret_from_fork+0x14/0x24 [ 203.884850] [ 203.886326] [ 203.886326] stack backtrace: [ 203.890679] CPU: 0 PID: 100 Comm: mmcqd/0 Not tainted 4.6.0-rc1-u3s #38 [ 203.897266] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 203.903374] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 203.911089] [] (show_stack) from [] (dump_stack+0x98/0xc4) [ 203.918296] [] (dump_stack) from [] (check_usage+0x49c/0x658) [ 203.925757] [] (check_usage) from [] (check_irq_usage+0x60/0xb8) [ 203.933509] [] (check_irq_usage) from [] (__lock_acquire+0x15c8/0x201c) [ 203.941844] [] (__lock_acquire) from [] (lock_acquire+0xa8/0xd0) [ 203.949598] [] (lock_acquire) from [] (mutex_lock_nested+0x78/0x4dc) [ 203.957639] [] (mutex_lock_nested) from [] (clk_prepare_lock+0x50/0xf8) [ 203.965969] [] (clk_prepare_lock) from [] (clk_round_rate+0x1c/0x58) [ 203.974085] [] (clk_round_rate) from [] (sdhci_s3c_set_clock+0x18c/0x1b0) [ 203.982551] [] (sdhci_s3c_set_clock) from [] (sdhci_cmu_set_clock+0x24/0x17c) [ 203.991403] [] (sdhci_cmu_set_clock) from [] (sdhci_do_set_ios+0x78/0x484) [ 203.999993] [] (sdhci_do_set_ios) from [] (sdhci_runtime_resume_host+0x60/0x114) [ 204.009094] [] (sdhci_runtime_resume_host) from [] (__rpm_callback+0x2c/0x60) [ 204.017938] [] (__rpm_callback) from [] (rpm_callback+0x54/0x80) [ 204.025661] [] (rpm_callback) from [] (rpm_resume+0x364/0x558) [ 204.033214] [] (rpm_resume) from [] (__pm_runtime_resume+0x60/0x8c) [ 204.041201] [] (__pm_runtime_resume) from [] (__mmc_claim_host+0x1b4/0x1f8) [ 204.049885] [] (__mmc_claim_host) from [] (mmc_sd_runtime_resume+0x20/0xac) [ 204.058563] [] (mmc_sd_runtime_resume) from [] (__rpm_callback+0x2c/0x60) [ 204.067063] [] (__rpm_callback) from [] (rpm_callback+0x54/0x80) [ 204.074788] [] (rpm_callback) from [] (rpm_resume+0x364/0x558) [ 204.082340] [] (rpm_resume) from [] (__pm_runtime_resume+0x60/0x8c) [ 204.090326] [] (__pm_runtime_resume) from [] (mmc_get_card+0x14/0x24) [ 204.098487] [] (mmc_get_card) from [] (mmc_blk_issue_rq+0x258/0x4f0) [ 204.106559] [] (mmc_blk_issue_rq) from [] (mmc_queue_thread+0xd0/0x1d8) [ 204.114903] [] (mmc_queue_thread) from [] (kthread+0xf4/0x10c) [ 204.122452] [] (kthread) from [] (ret_from_fork+0x14/0x24) --------------------------------------------------------------------------------------------------------- Best Regards -Anand Moon > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html