Hi all,
I am observing following lockdep info.
[ 139.806823] =========================================================
[ 139.811934] [ INFO: possible irq lock inversion dependency detected ]
[ 139.818362] 4.5.0-rc3-u3s #11 Tainted: G W
[ 139.823566] ---------------------------------------------------------
[ 139.829990] swapper/0/0 just changed the state of lock:
[ 139.835197] (&(&substream->self_group.lock)->rlock){..-...}, at:
[<c04e03cc>] _snd_pcm_stream_lock_irqsave+0x34/0x40
[ 139.845788] but this lock took another, SOFTIRQ-unsafe lock in the past:
[ 139.852468] (&(&pri_dai->spinlock)->rlock){+.+...}
and interrupts could create inverse lock ordering between them.
[ 139.863319]
[ 139.863319] other info that might help us debug this:
[ 139.869830] Possible interrupt unsafe locking scenario:
[ 139.869830]
[ 139.876599] CPU0 CPU1
[ 139.881113] ---- ----
[ 139.885626] lock(&(&pri_dai->spinlock)->rlock);
[ 139.890314] local_irq_disable();
[ 139.896216]
lock(&(&substream->self_group.lock)->rlock);
[ 139.904201]
lock(&(&pri_dai->spinlock)->rlock);
[ 139.911405] <Interrupt>
[ 139.914009] lock(&(&substream->self_group.lock)->rlock);
[ 139.919652]
[ 139.919652] *** DEADLOCK ***
[ 139.919652]
[ 139.925558] 1 lock held by swapper/0/0:
[ 139.929374] #0: (snd_pcm_link_rwlock){...-..}, at: [<c04e0330>]
snd_pcm_stream_lock+0x20/0x50
[ 139.938054]
[ 139.938054] the shortest dependencies between 2nd lock and 1st lock:
[ 139.945893] -> (&(&pri_dai->spinlock)->rlock){+.+...} ops: 37 {
[ 139.951856] HARDIRQ-ON-W at:
[ 139.955067] [<c066b89c>] _raw_spin_lock+0x3c/0x74
[ 139.961663] [<c0500558>] i2s_set_sysclk+0x40/0x464
[ 139.968347] [<c0500e0c>]
samsung_i2s_dai_probe+0x238/0x2b0
[ 139.975725] [<c04ed5f8>] soc_probe_dai.part.2+0x30/0x6c
[ 139.982842] [<c04ee1b8>]
snd_soc_register_card+0x854/0xe64
[ 139.990220] [<c04f9b0c>]
devm_snd_soc_register_card+0x38/0x70
[ 139.997859] [<c04ff0f8>]
asoc_simple_card_probe+0x224/0x460
[ 140.005323] [<c036da6c>] platform_drv_probe+0x4c/0xb0
[ 140.012267] [<c036c2ac>]
driver_probe_device+0x20c/0x2b8
[ 140.019472] [<c036a644>] bus_for_each_drv+0x60/0x94
[ 140.026242] [<c036bfc0>] __device_attach+0xb4/0x118
[ 140.033013] [<c036b464>] bus_probe_device+0x88/0x90
[ 140.039783] [<c036b900>]
deferred_probe_work_func+0x6c/0x9c
[ 140.047248] [<c0043408>] process_one_work+0x1a8/0x514
[ 140.054192] [<c00437ac>] worker_thread+0x38/0x574
[ 140.060789] [<c0049c0c>] kthread+0xf4/0x10c
[ 140.066865] [<c000f890>] ret_from_fork+0x14/0x24
[ 140.073376] SOFTIRQ-ON-W at:
[ 140.076587] [<c066b89c>] _raw_spin_lock+0x3c/0x74
[ 140.083183] [<c0500558>] i2s_set_sysclk+0x40/0x464
[ 140.089867] [<c0500e0c>]
samsung_i2s_dai_probe+0x238/0x2b0
[ 140.097245] [<c04ed5f8>] soc_probe_dai.part.2+0x30/0x6c
[ 140.104362] [<c04ee1b8>]
snd_soc_register_card+0x854/0xe64
[ 140.111740] [<c04f9b0c>]
devm_snd_soc_register_card+0x38/0x70
[ 140.119379] [<c04ff0f8>]
asoc_simple_card_probe+0x224/0x460
[ 140.126843] [<c036da6c>] platform_drv_probe+0x4c/0xb0
[ 140.133787] [<c036c2ac>]
driver_probe_device+0x20c/0x2b8
[ 140.140992] [<c036a644>] bus_for_each_drv+0x60/0x94
[ 140.147762] [<c036bfc0>] __device_attach+0xb4/0x118
[ 140.154533] [<c036b464>] bus_probe_device+0x88/0x90
[ 140.161303] [<c036b900>]
deferred_probe_work_func+0x6c/0x9c
[ 140.168768] [<c0043408>] process_one_work+0x1a8/0x514
[ 140.175712] [<c00437ac>] worker_thread+0x38/0x574
[ 140.182309] [<c0049c0c>] kthread+0xf4/0x10c
[ 140.188385] [<c000f890>] ret_from_fork+0x14/0x24
[ 140.194896] INITIAL USE at:
[ 140.198020] [<c066bb14>]
_raw_spin_lock_irqsave+0x48/0x84
[ 140.205224] [<c04c2d44>] clk_divider_set_rate+0x40/0xc0
[ 140.212255] [<c04c1320>] clk_change_rate+0x17c/0x210
[ 140.219025] [<c04c12b8>] clk_change_rate+0x114/0x210
[ 140.225796] }
[ 140.227532] ... key at: [<c13e2f04>] __key.37532+0x0/0x8
[ 140.233435] ... acquired at:
[ 140.236472] [<c04ffb18>] i2s_trigger+0x40/0x62c
[ 140.241246] [<c04f4d14>] soc_pcm_trigger+0xd0/0x11c
[ 140.246367] [<c04dfe58>] snd_pcm_action_single+0x38/0x80
[ 140.251922] [<c04e1dac>] snd_pcm_common_ioctl1+0x3bc/0xe20
[ 140.257651] [<c04e29b4>] snd_pcm_playback_ioctl1+0x1a4/0x69c
[ 140.263553] [<c01343f8>] do_vfs_ioctl+0xa0/0x9d4
[ 140.268414] [<c0134d60>] SyS_ioctl+0x34/0x5c
[ 140.272927] [<c000f800>] ret_fast_syscall+0x0/0x1c
[ 140.277962]
[ 140.279438] -> (&(&substream->self_group.lock)->rlock){..-...} ops: 153 {
[ 140.286209] IN-SOFTIRQ-W at:
[ 140.289333] [<c066b89c>] _raw_spin_lock+0x3c/0x74
[ 140.295757] [<c04e03cc>]
_snd_pcm_stream_lock_irqsave+0x34/0x40
[ 140.303395] [<c04e6f44>] snd_pcm_period_elapsed+0x1c/0xa0
[ 140.310512] [<c02de5b0>] pl330_tasklet+0x198/0x518
[ 140.317022] [<c002e424>] tasklet_action+0xac/0x164
[ 140.323532] [<c002e6ac>] __do_softirq+0x168/0x2c0
[ 140.329955] [<c002eba8>] irq_exit+0xec/0x128
[ 140.335945] [<c0087314>] __handle_domain_irq+0x80/0xec
[ 140.342802] [<c0009514>] gic_handle_irq+0x54/0x94
[ 140.349225] [<c00144f8>] __irq_svc+0x58/0x98
[ 140.355214] [<c00102f8>] arch_cpu_idle+0x24/0x3c
[ 140.361551] [<c00102f8>] arch_cpu_idle+0x24/0x3c
[ 140.367887] [<c006d5d4>] cpu_startup_entry+0x1f4/0x280
[ 140.374744] [<c08c8ccc>] start_kernel+0x3ec/0x3f8
[ 140.381169] INITIAL USE at:
[ 140.384205] [<c066b89c>] _raw_spin_lock+0x3c/0x74
[ 140.390542] [<c04e0850>] snd_pcm_sync_ptr+0xf8/0x1e0
[ 140.397139] [<c04e1e68>] snd_pcm_common_ioctl1+0x478/0xe20
[ 140.404256] [<c04e3078>]
snd_pcm_capture_ioctl1+0x1a4/0x688
[ 140.411461] [<c01343f8>] do_vfs_ioctl+0xa0/0x9d4
[ 140.417710] [<c0134d60>] SyS_ioctl+0x34/0x5c
[ 140.423613] [<c000f800>] ret_fast_syscall+0x0/0x1c
[ 140.430036] }
[ 140.431685] ... key at: [<c13e2be8>] __key.29136+0x0/0x8
[ 140.437501] ... acquired at:
[ 140.440452] [<c0079630>] __lock_acquire+0x774/0x1ee0
[ 140.445659] [<c007b390>] lock_acquire+0xa8/0xd0
[ 140.450433] [<c066b89c>] _raw_spin_lock+0x3c/0x74
[ 140.455381] [<c04e03cc>] _snd_pcm_stream_lock_irqsave+0x34/0x40
[ 140.461544] [<c04e6f44>] snd_pcm_period_elapsed+0x1c/0xa0
[ 140.467186] [<c02de5b0>] pl330_tasklet+0x198/0x518
[ 140.472220] [<c002e424>] tasklet_action+0xac/0x164
[ 140.477255] [<c002e6ac>] __do_softirq+0x168/0x2c0
[ 140.482202] [<c002eba8>] irq_exit+0xec/0x128
[ 140.486716] [<c0087314>] __handle_domain_irq+0x80/0xec
[ 140.492097] [<c0009514>] gic_handle_irq+0x54/0x94
[ 140.497044] [<c00144f8>] __irq_svc+0x58/0x98
[ 140.501559] [<c00102f8>] arch_cpu_idle+0x24/0x3c
[ 140.506420] [<c00102f8>] arch_cpu_idle+0x24/0x3c
[ 140.511280] [<c006d5d4>] cpu_startup_entry+0x1f4/0x280
[ 140.516662] [<c08c8ccc>] start_kernel+0x3ec/0x3f8
[ 140.521609]
[ 140.523086]
[ 140.523086] stack backtrace:
[ 140.527435] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W
4.5.0-rc3-u3s #11
[ 140.535240] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[ 140.541339] [<c0016d6c>] (unwind_backtrace) from [<c00139f8>]
(show_stack+0x10/0x14)
[ 140.549063] [<c00139f8>] (show_stack) from [<c0283884>]
(dump_stack+0x98/0xc4)
[ 140.556263] [<c0283884>] (dump_stack) from [<c0075458>]
(print_irq_inversion_bug+0x1d4/0x21c)
[ 140.564766] [<c0075458>] (print_irq_inversion_bug) from
[<c0075550>] (check_usage_forwards+0xb0/0x10c)
[ 140.574051] [<c0075550>] (check_usage_forwards) from [<c00764f8>]
(mark_lock+0x370/0x81c)
[ 140.582211] [<c00764f8>] (mark_lock) from [<c0079630>]
(__lock_acquire+0x774/0x1ee0)
[ 140.589936] [<c0079630>] (__lock_acquire) from [<c007b390>]
(lock_acquire+0xa8/0xd0)
[ 140.597665] [<c007b390>] (lock_acquire) from [<c066b89c>]
(_raw_spin_lock+0x3c/0x74)
[ 140.605389] [<c066b89c>] (_raw_spin_lock) from [<c04e03cc>]
(_snd_pcm_stream_lock_irqsave+0x34/0x40)
[ 140.614503] [<c04e03cc>] (_snd_pcm_stream_lock_irqsave) from
[<c04e6f44>] (snd_pcm_period_elapsed+0x1c/0xa0)
[ 140.624313] [<c04e6f44>] (snd_pcm_period_elapsed) from [<c02de5b0>]
(pl330_tasklet+0x198/0x518)
[ 140.632993] [<c02de5b0>] (pl330_tasklet) from [<c002e424>]
(tasklet_action+0xac/0x164)
[ 140.640890] [<c002e424>] (tasklet_action) from [<c002e6ac>]
(__do_softirq+0x168/0x2c0)
[ 140.648787] [<c002e6ac>] (__do_softirq) from [<c002eba8>]
(irq_exit+0xec/0x128)
[ 140.656080] [<c002eba8>] (irq_exit) from [<c0087314>]
(__handle_domain_irq+0x80/0xec)
[ 140.663889] [<c0087314>] (__handle_domain_irq) from [<c0009514>]
(gic_handle_irq+0x54/0x94)
[ 140.672219] [<c0009514>] (gic_handle_irq) from [<c00144f8>]
(__irq_svc+0x58/0x98)
[ 140.679677] Exception stack(0xc0aa5f50 to 0xc0aa5f98)
[ 140.684716] 5f40: 00000000
2e0b1000 00000000 c0aaa540
[ 140.692879] 5f60: c0aa4000 c0aa655c 00000000 00000000 c0aa5fa8
c093d49c c0aa65bc c0aa65c4
[ 140.701035] 5f80: 00000000 c0aa5fa0 c0076b38 c00102f8 20030053 ffffffff
[ 140.707637] [<c00144f8>] (__irq_svc) from [<c00102f8>]
(arch_cpu_idle+0x24/0x3c)
[ 140.715014] [<c00102f8>] (arch_cpu_idle) from [<c006d5d4>]
(cpu_startup_entry+0x1f4/0x280)
[ 140.723265] [<c006d5d4>] (cpu_startup_entry) from [<c08c8ccc>]
(start_kernel+0x3ec/0x3f8)
Best Regards
-Anand Moon
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