Hello,
I have just booted 3.13-rc3 on my i.MX6DL board, done nothing but watch
it start, and I have got this!
Philippe
======================================================
[ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
3.13.0-rc3+ #4 Not tainted
------------------------------------------------------
ALSA device list:
No soundcards found.
kworker/u4:0/6 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
(prepare_lock){+.+.+.}, at: [<804b55b4>] clk_prepare_lock+0x78/0xec
and this task is already holding:
(&(&host->lock)->rlock){-.-...}, at: [<804941c4>] sdhci_do_set_ios+0x20/0x728
which would create a new lock dependency:
(&(&host->lock)->rlock){-.-...} -> (prepare_lock){+.+.+.}
but this new dependency connects a HARDIRQ-irq-safe lock:
(&(&host->lock)->rlock){-.-...}
... which became HARDIRQ-irq-safe at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<8006069c>] __lock_acquire+0xae0/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<80650b64>] _raw_spin_lock+0x34/0x44
[<8049679c>] sdhci_irq+0x24/0xa30
[<8006b64c>] handle_irq_event_percpu+0x54/0x1a4
[<8006b7e0>] handle_irq_event+0x44/0x64
[<8006e928>] handle_fasteoi_irq+0xc4/0x15c
[<8006afb0>] generic_handle_irq+0x28/0x38
[<8000f1f4>] handle_IRQ+0x54/0xb4
[<80008644>] gic_handle_irq+0x30/0x64
[<80012f64>] __irq_svc+0x44/0x5c
[<806488c0>] printk+0x3c/0x44
[<80493e20>] sdhci_add_host+0x83c/0xbc0
[<80498bcc>] sdhci_esdhc_imx_probe+0x324/0x548
[<8035f480>] platform_drv_probe+0x20/0x50
[<8035d8ac>] driver_probe_device+0x118/0x22c
[<8035da5c>] __driver_attach+0x9c/0xa0
[<8035bfa0>] bus_for_each_dev+0x5c/0x90
[<8035d380>] driver_attach+0x20/0x28
[<8035cf80>] bus_add_driver+0xe0/0x1d8
[<8035e114>] driver_register+0x80/0xfc
[<8035edcc>] __platform_driver_register+0x50/0x64
[<808979c0>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
to a HARDIRQ-irq-unsafe lock:
(prepare_lock){+.+.+.}
... which became HARDIRQ-irq-unsafe at:
... [<8005f640>] mark_lock+0x15c/0x6d8
[<80062594>] mark_held_locks+0xa0/0x138
[<800626dc>] trace_hardirqs_on_caller+0xb0/0x1cc
[<8006280c>] trace_hardirqs_on+0x14/0x18
[<8064daa8>] mutex_trylock+0x180/0x20c
[<804b5550>] clk_prepare_lock+0x14/0xec
[<804b5d34>] clk_notifier_register+0x2c/0xf0
[<80015f84>] twd_clk_init+0x50/0x68
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
other info that might help us debug this:
Possible interrupt unsafe locking scenario:
CPU0 CPU1
---- ----
lock(prepare_lock);
local_irq_disable();
lock(&(&host->lock)->rlock);
lock(prepare_lock);
<Interrupt>
lock(&(&host->lock)->rlock);
*** DEADLOCK ***
3 locks held by kworker/u4:0/6:
#0: (kmmcd){.+.+.+}, at: [<8003ded4>] process_one_work+0x130/0x444
#1: ((&(&host->detect)->work)){+.+.+.}, at: [<8003ded4>]
process_one_work+0x130/0x444
#2: (&(&host->lock)->rlock){-.-...}, at: [<804941c4>]
sdhci_do_set_ios+0x20/0x728
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&(&host->lock)->rlock){-.-...} ops: 410 {
IN-HARDIRQ-W at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<8006069c>] __lock_acquire+0xae0/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<80650b64>] _raw_spin_lock+0x34/0x44
[<8049679c>] sdhci_irq+0x24/0xa30
[<8006b64c>] handle_irq_event_percpu+0x54/0x1a4
[<8006b7e0>] handle_irq_event+0x44/0x64
[<8006e928>] handle_fasteoi_irq+0xc4/0x15c
[<8006afb0>] generic_handle_irq+0x28/0x38
[<8000f1f4>] handle_IRQ+0x54/0xb4
[<80008644>] gic_handle_irq+0x30/0x64
[<80012f64>] __irq_svc+0x44/0x5c
[<806488c0>] printk+0x3c/0x44
[<80493e20>] sdhci_add_host+0x83c/0xbc0
[<80498bcc>] sdhci_esdhc_imx_probe+0x324/0x548
[<8035f480>] platform_drv_probe+0x20/0x50
[<8035d8ac>] driver_probe_device+0x118/0x22c
[<8035da5c>] __driver_attach+0x9c/0xa0
[<8035bfa0>] bus_for_each_dev+0x5c/0x90
[<8035d380>] driver_attach+0x20/0x28
[<8035cf80>] bus_add_driver+0xe0/0x1d8
[<8035e114>] driver_register+0x80/0xfc
[<8035edcc>] __platform_driver_register+0x50/0x64
[<808979c0>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
IN-SOFTIRQ-W at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<800601b4>] __lock_acquire+0x5f8/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<80650c44>] _raw_spin_lock_irqsave+0x4c/0x60
[<80492f54>] sdhci_tasklet_finish+0x1c/0x120
[<8002bb24>] tasklet_action+0x90/0x14c
[<8002c07c>] __do_softirq+0x100/0x254
[<8002c5a4>] irq_exit+0xb0/0x108
[<8000f1f8>] handle_IRQ+0x58/0xb4
[<80008644>] gic_handle_irq+0x30/0x64
[<80012f64>] __irq_svc+0x44/0x5c
[<806488c0>] printk+0x3c/0x44
[<80493e20>] sdhci_add_host+0x83c/0xbc0
[<80498bcc>] sdhci_esdhc_imx_probe+0x324/0x548
[<8035f480>] platform_drv_probe+0x20/0x50
[<8035d8ac>] driver_probe_device+0x118/0x22c
[<8035da5c>] __driver_attach+0x9c/0xa0
[<8035bfa0>] bus_for_each_dev+0x5c/0x90
[<8035d380>] driver_attach+0x20/0x28
[<8035cf80>] bus_add_driver+0xe0/0x1d8
[<8035e114>] driver_register+0x80/0xfc
[<8035edcc>] __platform_driver_register+0x50/0x64
[<808979c0>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
INITIAL USE at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<8005fee0>] __lock_acquire+0x324/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<80650c44>] _raw_spin_lock_irqsave+0x4c/0x60
[<804941c4>] sdhci_do_set_ios+0x20/0x728
[<804948f4>] sdhci_set_ios+0x28/0x34
[<80481680>] mmc_power_up+0x6c/0xd0
[<804823d8>] mmc_start_host+0x40/0x70
[<804833f0>] mmc_add_host+0x60/0x88
[<80493dd4>] sdhci_add_host+0x7f0/0xbc0
[<80498bcc>] sdhci_esdhc_imx_probe+0x324/0x548
[<8035f480>] platform_drv_probe+0x20/0x50
[<8035d8ac>] driver_probe_device+0x118/0x22c
[<8035da5c>] __driver_attach+0x9c/0xa0
[<8035bfa0>] bus_for_each_dev+0x5c/0x90
[<8035d380>] driver_attach+0x20/0x28
[<8035cf80>] bus_add_driver+0xe0/0x1d8
[<8035e114>] driver_register+0x80/0xfc
[<8035edcc>] __platform_driver_register+0x50/0x64
[<808979c0>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
}
... key at: [<80e517cc>] __key.24069+0x0/0x8
... acquired at:
[<8005f13c>] check_usage+0x3e8/0x5f4
[<8005f3a0>] check_irq_usage+0x58/0xb4
[<80060ce0>] __lock_acquire+0x1124/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<8064f57c>] mutex_lock_nested+0x5c/0x3b4
[<804b55b4>] clk_prepare_lock+0x78/0xec
[<804b5fc8>] clk_get_rate+0x14/0x64
[<80497c74>] esdhc_pltfm_set_clock+0x20/0x2a8
[<80492b60>] sdhci_set_clock+0x4c/0x424
[<804944b8>] sdhci_do_set_ios+0x314/0x728
[<804948f4>] sdhci_set_ios+0x28/0x34
[<80481560>] mmc_set_bus_mode+0x20/0x24
[<804858d4>] mmc_attach_mmc+0x140/0x1a0
[<80482348>] mmc_rescan+0x28c/0x2dc
[<8003df48>] process_one_work+0x1a4/0x444
[<8003ec7c>] worker_thread+0x120/0x3e4
[<8004539c>] kthread+0xcc/0xe8
[<8000e988>] ret_from_fork+0x14/0x2c
the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock:
-> (prepare_lock){+.+.+.} ops: 337 {
HARDIRQ-ON-W at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<80062594>] mark_held_locks+0xa0/0x138
[<800626dc>] trace_hardirqs_on_caller+0xb0/0x1cc
[<8006280c>] trace_hardirqs_on+0x14/0x18
[<8064daa8>] mutex_trylock+0x180/0x20c
[<804b5550>] clk_prepare_lock+0x14/0xec
[<804b5d34>] clk_notifier_register+0x2c/0xf0
[<80015f84>] twd_clk_init+0x50/0x68
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
SOFTIRQ-ON-W at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<80062594>] mark_held_locks+0xa0/0x138
[<80062720>] trace_hardirqs_on_caller+0xf4/0x1cc
[<8006280c>] trace_hardirqs_on+0x14/0x18
[<8064daa8>] mutex_trylock+0x180/0x20c
[<804b5550>] clk_prepare_lock+0x14/0xec
[<804b5d34>] clk_notifier_register+0x2c/0xf0
[<80015f84>] twd_clk_init+0x50/0x68
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
RECLAIM_FS-ON-W at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<80062594>] mark_held_locks+0xa0/0x138
[<80062dd8>] lockdep_trace_alloc+0x90/0x110
[<800a8bf4>] __alloc_pages_nodemask+0x70/0x84c
[<800d7558>] new_slab+0x6c/0x270
[<80649880>]
__slab_alloc.isra.71.constprop.73+0x3b8/0x504
[<800d83d4>] kmem_cache_alloc+0x120/0x12c
[<800f380c>] __d_alloc+0x24/0x180
[<800f3b6c>] d_alloc+0x18/0x68
[<800e652c>] lookup_dcache+0x8c/0xb0
[<800e6570>] __lookup_hash+0x20/0x4c
[<800eb344>] lookup_one_len+0xcc/0x120
[<80256fc4>] __create_file+0x74/0x214
[<80257238>] debugfs_create_file+0x30/0x38
[<80257ffc>] debugfs_create_u32+0x44/0x54
[<804b65d4>] clk_debug_create_subtree+0x98/0x11c
[<804b6614>] clk_debug_create_subtree+0xd8/0x11c
[<80898fb4>] clk_debug_init+0xac/0x13c
[<800088b8>] do_one_initcall+0x40/0x170
[<80867c78>] kernel_init_freeable+0x104/0x1d4
[<80644934>] kernel_init+0x10/0x118
[<8000e988>] ret_from_fork+0x14/0x2c
INITIAL USE at:
[<8005f640>] mark_lock+0x15c/0x6d8
[<8005fee0>] __lock_acquire+0x324/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<8064da38>] mutex_trylock+0x110/0x20c
[<804b5550>] clk_prepare_lock+0x14/0xec
[<804b7548>] __clk_init+0x20/0x458
[<804b7a50>] _clk_register+0xd0/0x168
[<804b7b98>] clk_register+0x3c/0x88
[<804b857c>] clk_register_fixed_rate+0x88/0xd4
[<804b8630>] of_fixed_clk_setup+0x68/0x90
[<80899088>] of_clk_init+0x44/0x6c
[<8086b2c8>] time_init+0x2c/0x38
[<808679f0>] start_kernel+0x1dc/0x360
[<10008074>] 0x10008074
}
... key at: [<808fd198>] prepare_lock+0x38/0x48
... acquired at:
[<8005f170>] check_usage+0x41c/0x5f4
[<8005f3a0>] check_irq_usage+0x58/0xb4
[<80060ce0>] __lock_acquire+0x1124/0x1cc8
[<80061d9c>] lock_acquire+0x68/0x7c
[<8064f57c>] mutex_lock_nested+0x5c/0x3b4
[<804b55b4>] clk_prepare_lock+0x78/0xec
[<804b5fc8>] clk_get_rate+0x14/0x64
[<80497c74>] esdhc_pltfm_set_clock+0x20/0x2a8
[<80492b60>] sdhci_set_clock+0x4c/0x424
[<804944b8>] sdhci_do_set_ios+0x314/0x728
[<804948f4>] sdhci_set_ios+0x28/0x34
[<80481560>] mmc_set_bus_mode+0x20/0x24
[<804858d4>] mmc_attach_mmc+0x140/0x1a0
[<80482348>] mmc_rescan+0x28c/0x2dc
[<8003df48>] process_one_work+0x1a4/0x444
[<8003ec7c>] worker_thread+0x120/0x3e4
[<8004539c>] kthread+0xcc/0xe8
[<8000e988>] ret_from_fork+0x14/0x2c
stack backtrace:
CPU: 0 PID: 6 Comm: kworker/u4:0 Not tainted 3.13.0-rc3+ #4
Workqueue: kmmcd mmc_rescan
Backtrace:
[<80012218>] (dump_backtrace+0x0/0x10c) from [<800123b8>] (show_stack+0x18/0x1c)
r6:00000000 r5:809c53f0 r4:00000000 r3:bf872d00
[<800123a0>] (show_stack+0x0/0x1c) from [<8064a720>] (dump_stack+0x78/0x94)
[<8064a6a8>] (dump_stack+0x0/0x94) from [<8005f190>] (check_usage+0x43c/0x5f4)
r4:00000001 r3:bf872d00
[<8005ed54>] (check_usage+0x0/0x5f4) from [<8005f3a0>]
(check_irq_usage+0x58/0xb4)
[<8005f348>] (check_irq_usage+0x0/0xb4) from [<80060ce0>]
(__lock_acquire+0x1124/0x1cc8)
r8:bf8730e8 r7:809c53f0 r6:80e46a54 r5:bf8730d0 r4:00000003
[<8005fbbc>] (__lock_acquire+0x0/0x1cc8) from [<80061d9c>]
(lock_acquire+0x68/0x7c)
[<80061d34>] (lock_acquire+0x0/0x7c) from [<8064f57c>]
(mutex_lock_nested+0x5c/0x3b4)
r7:00000000 r6:80dfc7bc r5:804b55b4 r4:808fd160
[<8064f520>] (mutex_lock_nested+0x0/0x3b4) from [<804b55b4>]
(clk_prepare_lock+0x78/0xec)
[<804b553c>] (clk_prepare_lock+0x0/0xec) from [<804b5fc8>]
(clk_get_rate+0x14/0x64)
r6:bf020c40 r5:000186a0 r4:bf828380 r3:80497c54
[<804b5fb4>] (clk_get_rate+0x0/0x64) from [<80497c74>]
(esdhc_pltfm_set_clock+0x20/0x2a8)
r5:000186a0 r4:bf020c40
[<80497c54>] (esdhc_pltfm_set_clock+0x0/0x2a8) from [<80492b60>]
(sdhci_set_clock+0x4c/0x424)
[<80492b14>] (sdhci_set_clock+0x0/0x424) from [<804944b8>]
(sdhci_do_set_ios+0x314/0x728)
[<804941a4>] (sdhci_do_set_ios+0x0/0x728) from [<804948f4>]
(sdhci_set_ios+0x28/0x34)
[<804948cc>] (sdhci_set_ios+0x0/0x34) from [<80481560>]
(mmc_set_bus_mode+0x20/0x24)
r5:806947d0 r4:bf020800
[<80481540>] (mmc_set_bus_mode+0x0/0x24) from [<804858d4>]
(mmc_attach_mmc+0x140/0x1a0)
[<80485794>] (mmc_attach_mmc+0x0/0x1a0) from [<80482348>]
(mmc_rescan+0x28c/0x2dc)
r5:806947d0 r4:bf020af8
[<804820bc>] (mmc_rescan+0x0/0x2dc) from [<8003df48>]
(process_one_work+0x1a4/0x444)
r7:bf9bc100 r6:bf80dc00 r5:bf020af8 r4:bf82d880
[<8003dda4>] (process_one_work+0x0/0x444) from [<8003ec7c>]
(worker_thread+0x120/0x3e4)
[<8003eb5c>] (worker_thread+0x0/0x3e4) from [<8004539c>] (kthread+0xcc/0xe8)
[<800452d0>] (kthread+0x0/0xe8) from [<8000e988>] (ret_from_fork+0x14/0x2c)
r7:00000000 r6:00000000 r5:800452d0 r4:bf840580
mmc2: BKOPS_EN bit is not set
mmc2: new high speed MMC card at address 0001
--
Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
