From a01c34f72e7cd2624570818f579b5ab464f93de2 Mon Sep 17 00:00:00 2001 From: Sergey Senozhatsky Date: Sun, 14 Jul 2013 14:03:27 +0300 Subject: [PATCH] radeon kms: do not flush uninitialized hotplug work Fix a warning from lockdep caused by calling flush_work() for uninitialized hotplug work. Initialize hotplug_work, audio_work and reset_work upon successful radeon_irq_kms_init() completion and thus perform hotplug flush_work only when rdev->irq.installed is true. [ 4.790019] [drm] Loading CEDAR Microcode [ 4.790943] r600_cp: Failed to load firmware "radeon/CEDAR_smc.bin" [ 4.791152] [drm:evergreen_startup] *ERROR* Failed to load firmware! [ 4.791330] radeon 0000:01:00.0: disabling GPU acceleration [ 4.792633] INFO: trying to register non-static key. [ 4.792792] the code is fine but needs lockdep annotation. [ 4.792953] turning off the locking correctness validator. [ 4.793114] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.11.0-rc0-dbg-10676-gfe56456-dirty #1816 [ 4.793314] Hardware name: Acer Aspire 5741G /Aspire 5741G , BIOS V1.20 02/08/2011 [ 4.793507] ffffffff821fd810 ffff8801530b9a18 ffffffff8160434e 0000000000000002 [ 4.794155] ffff8801530b9ad8 ffffffff810b8404 ffff8801530b0798 ffff8801530b0000 [ 4.794789] ffff8801530b9b00 0000000000000046 00000000000004c0 ffffffff00000000 [ 4.795418] Call Trace: [ 4.795573] [] dump_stack+0x4e/0x82 [ 4.795731] [] __lock_acquire+0x1a64/0x1d30 [ 4.795893] [] ? dev_vprintk_emit+0x50/0x60 [ 4.796034] [] lock_acquire+0xa4/0x200 [ 4.796216] [] ? flush_work+0x5/0x280 [ 4.796375] [] flush_work+0x3d/0x280 [ 4.796520] [] ? flush_work+0x5/0x280 [ 4.796682] [] ? trace_hardirqs_on_caller+0xfd/0x1c0 [ 4.796862] [] ? delay_tsc+0x95/0xf0 [ 4.797024] [] radeon_irq_kms_fini+0x2b/0x70 [ 4.797186] [] evergreen_init+0x2a9/0x2e0 [ 4.797347] [] radeon_device_init+0x5ef/0x700 [ 4.797511] [] ? pci_find_capability+0x47/0x50 [ 4.797672] [] radeon_driver_load_kms+0x8d/0x150 [ 4.797843] [] drm_get_pci_dev+0x166/0x280 [ 4.798007] [] ? kfree+0xf5/0x2e0 [ 4.798168] [] ? radeon_pci_probe+0x98/0xd0 [ 4.798329] [] radeon_pci_probe+0xaa/0xd0 [ 4.798489] [] pci_device_probe+0x84/0xe0 [ 4.798644] [] driver_probe_device+0x76/0x240 [ 4.798805] [] __driver_attach+0x93/0xa0 [ 4.798948] [] ? __device_attach+0x40/0x40 [ 4.799126] [] bus_for_each_dev+0x6b/0xb0 [ 4.799272] [] driver_attach+0x1e/0x20 [ 4.799434] [] bus_add_driver+0x1f0/0x280 [ 4.799596] [] driver_register+0x74/0x150 [ 4.799758] [] __pci_register_driver+0x5d/0x60 [ 4.799936] [] ? ttm_init+0x67/0x67 [ 4.800081] [] drm_pci_init+0x115/0x130 [ 4.800243] [] ? ttm_init+0x67/0x67 [ 4.800405] [] radeon_init+0x9c/0xba [ 4.800586] [] do_one_initcall+0xfa/0x150 [ 4.800746] [] ? parse_args+0x120/0x330 [ 4.800909] [] kernel_init_freeable+0x111/0x191 [ 4.801052] [] ? do_early_param+0x88/0x88 [ 4.801233] [] ? rest_init+0x140/0x140 [ 4.801393] [] kernel_init+0xe/0x180 [ 4.801556] [] ret_from_fork+0x7c/0xb0 [ 4.801718] [] ? rest_init+0x140/0x140 Signed-off-by: Sergey Senozhatsky Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/radeon_irq_kms.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c index bcdefd1dcd43..081886b0642d 100644 --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c @@ -260,10 +260,6 @@ int radeon_irq_kms_init(struct radeon_device *rdev) { int r = 0; - INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); - INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); - INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func); - spin_lock_init(&rdev->irq.lock); r = drm_vblank_init(rdev->ddev, rdev->num_crtc); if (r) { @@ -285,6 +281,11 @@ int radeon_irq_kms_init(struct radeon_device *rdev) rdev->irq.installed = false; return r; } + + INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); + INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi); + INIT_WORK(&rdev->reset_work, radeon_irq_reset_work_func); + DRM_INFO("radeon: irq initialized.\n"); return 0; } @@ -304,8 +305,8 @@ void radeon_irq_kms_fini(struct radeon_device *rdev) rdev->irq.installed = false; if (rdev->msi_enabled) pci_disable_msi(rdev->pdev); + flush_work(&rdev->hotplug_work); } - flush_work(&rdev->hotplug_work); } /** -- 2.20.1