Description of problem: kernel complains of "possible recursive locking detected" Version-Release number of selected component (if applicable): kernel-3.9.0-0.rc5.git1.301.fc19.i686 (running graphics testday-2013-04-23-i686.iso) How reproducible: every time Steps to Reproduce: 1. boot testday-2013-04-23-i686.iso to single-user mode (append " single" to kernel boot command line) on Macmini1,1 i686 only (Intel Core Duo [not Core*2* Duo]) 2. pm-suspend # on VGA console 3. resume (use main Power button) Actual results: [ 75.751519] PM: resume of devices complete after 1707.909 msecs [ 75.754200] PM: resume devices took 1.711 seconds [ 75.804648] PM: Finishing wakeup. [ 75.804653] Restarting tasks ... done. [ 75.825608] video LNXVIDEO:00: Restoring backlight state [ 84.233106] ============================================= [ 84.233106] [ INFO: possible recursive locking detected ] [ 84.233106] 3.9.0-0.rc5.git1.301.fc19.i686 #1 Not tainted [ 84.233106] --------------------------------------------- [ 84.233106] kworker/0:1/26 is trying to acquire lock: [ 84.233106] (&crtc->mutex){+.+.+.}, at: [<f7e9e81c>] intel_get_load_detect_pipe+0x15c/0x3b0 [i915] [ 84.233106] but task is already holding lock: [ 84.233106] (&crtc->mutex){+.+.+.}, at: [<f7d54822>] drm_modeset_lock_all+0x42/0x60 [drm] [ 84.233106] other info that might help us debug this: [ 84.233106] Possible unsafe locking scenario: [ 84.233106] CPU0 [ 84.233106] ---- [ 84.233106] lock(&crtc->mutex); [ 84.233106] lock(&crtc->mutex); [ 84.233106] *** DEADLOCK *** [ 84.233106] May be due to missing lock nesting notation [ 84.233106] 4 locks held by kworker/0:1/26: [ 84.233106] #0: (events){.+.+.+}, at: [<c04627be>] process_one_work+0x12e/0x590 [ 84.233106] #1: ((&(&dev->mode_config.output_poll_work)->work)){+.+.+.}, at: [<c04627be>] process_one_work+0x12e/0x590 [ 84.233106] #2: (&dev->mode_config.mutex){+.+.+.}, at: [<f7d547fa>] drm_modeset_lock_all+0x1a/0x60 [drm] [ 84.233106] #3: (&crtc->mutex){+.+.+.}, at: [<f7d54822>] drm_modeset_lock_all+0x42/0x60 [drm] [ 84.233106] stack backtrace: [ 84.233106] Pid: 26, comm: kworker/0:1 Not tainted 3.9.0-0.rc5.git1.301.fc19.i686 #1 [ 84.233106] Call Trace: [ 84.233106] [<c04aa8f7>] __lock_acquire+0x1487/0x1630 [ 84.233106] [<c04a6840>] ? __lock_is_held+0x40/0x70 [ 84.233106] [<c04ab0bb>] lock_acquire+0x8b/0x1b0 [ 84.233106] [<f7e9e81c>] ? intel_get_load_detect_pipe+0x15c/0x3b0 [i915] [ 84.233106] [<c0a2ed2e>] mutex_lock_nested+0x6e/0x330 [ 84.233106] [<f7e9e81c>] ? intel_get_load_detect_pipe+0x15c/0x3b0 [i915] [ 84.233106] [<f7e9e81c>] ? intel_get_load_detect_pipe+0x15c/0x3b0 [i915] [ 84.233106] [<f7d54925>] ? drm_get_connector_name+0x45/0x50 [drm] [ 84.233106] [<f7e9e81c>] intel_get_load_detect_pipe+0x15c/0x3b0 [i915] [ 84.233106] [<c047df9f>] ? sched_clock_cpu+0xdf/0x150 [ 84.233106] [<c040e420>] ? save_stack_trace+0x30/0x50 [ 84.233106] [<c04a61db>] ? trace_hardirqs_off+0xb/0x10 [ 84.233106] [<f7eb9e07>] intel_tv_detect+0xe7/0x4a0 [i915] [ 84.233106] [<c04a8fc3>] ? mark_held_locks+0x83/0xe0 [ 84.233106] [<c0a31c8f>] ? _raw_spin_unlock_irqrestore+0x2f/0x70 [ 84.233106] [<c0a29311>] ? __slab_free+0x16a/0x332 [ 84.233106] [<c04a910c>] ? trace_hardirqs_on_caller+0xec/0x170 [ 84.233106] [<f7d042a8>] drm_helper_probe_single_connector_modes+0x1b8/0x330 [drm_kms_helper] [ 84.233106] [<f7d01d91>] drm_fb_helper_probe_connector_modes.isra.3+0x41/0x60 [drm_kms_helper] [ 84.233106] [<f7d02c92>] drm_fb_helper_hotplug_event+0xc2/0xf0 [drm_kms_helper] [ 84.233106] [<f7eb9079>] intel_fb_output_poll_changed+0x19/0x20 [i915] [ 84.233106] [<f7d03e91>] drm_kms_helper_hotplug_event+0x21/0x30 [drm_kms_helper] [ 84.233106] [<f7d04055>] output_poll_execute+0x155/0x170 [drm_kms_helper] [ 84.233106] [<c046283a>] process_one_work+0x1aa/0x590 [ 84.233106] [<c04627be>] ? process_one_work+0x12e/0x590 [ 84.233106] [<c0462fc6>] ? worker_thread+0x196/0x350 [ 84.233106] [<c0462f25>] worker_thread+0xf5/0x350 [ 84.233106] [<c0462e30>] ? rescuer_thread+0x210/0x210 [ 84.233106] [<c0467c88>] kthread+0xa8/0xb0 [ 84.233106] [<c04a919b>] ? trace_hardirqs_on+0xb/0x10 [ 84.233106] [<c0a39eb7>] ret_from_kernel_thread+0x1b/0x28 [ 84.233106] [<c0467be0>] ? insert_kthread_work+0x70/0x70 [ 84.511942] VFS: busy inodes on changed media or resized disk sr0 Expected results: no complaint Additional info:
Created attachment 739544 [details] dmesg output
Bug 969871 could be related or a dup.
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