mirror of
https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
synced 2026-10-15 09:14:18 -04:00
| Filename | Latest commit message | Latest commit date |
|---|---|---|
a974862fae
Sometimes we may meet the following lockdep issue.
The root cause is .set_clock callback is executed with spin_lock_irqsave
in sdhci_do_set_ios. However, the IMX set_clock callback will try to access
clk_get_rate which is using a mutex lock.
The fix avoids access mutex in .set_clock callback by initializing the
pltfm_host->clock at probe time and use it later instead of calling
clk_get_rate again in atomic context.
[ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
3.13.0-rc1+ #285 Not tainted
------------------------------------------------------
kworker/u8:1/29 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
(prepare_lock){+.+...}, at: [<80480b08>] clk_prepare_lock+0x44/0xe4
and this task is already holding:
(&(&host->lock)->rlock#2){-.-...}, at: [<804611f4>] sdhci_do_set_ios+0x20/0x720
which would create a new lock dependency:
(&(&host->lock)->rlock#2){-.-...} -> (prepare_lock){+.+...}
but this new dependency connects a HARDIRQ-irq-safe lock:
(&(&host->lock)->rlock#2){-.-...}
... which became HARDIRQ-irq-safe at:
[<8005f030>] mark_lock+0x140/0x6ac
[<80060760>] __lock_acquire+0xb30/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061d2f0>] _raw_spin_lock+0x30/0x40
[<80460668>] sdhci_irq+0x24/0xa68
[<8006b1d4>] handle_irq_event_percpu+0x54/0x18c
[<8006b350>] handle_irq_event+0x44/0x64
[<8006e50c>] handle_fasteoi_irq+0xa0/0x170
[<8006a8f0>] generic_handle_irq+0x30/0x44
[<8000f238>] handle_IRQ+0x54/0xbc
[<8000864c>] gic_handle_irq+0x30/0x64
[<80013024>] __irq_svc+0x44/0x5c
[<80614c58>] printk+0x38/0x40
[<804622a8>] sdhci_add_host+0x844/0xbcc
[<80464948>] sdhci_esdhc_imx_probe+0x378/0x67c
[<8032ee88>] platform_drv_probe+0x20/0x50
[<8032d48c>] driver_probe_device+0x118/0x234
[<8032d690>] __driver_attach+0x9c/0xa0
[<8032b89c>] bus_for_each_dev+0x68/0x9c
[<8032cf44>] driver_attach+0x20/0x28
[<8032cbc8>] bus_add_driver+0x148/0x1f4
[<8032dce0>] driver_register+0x80/0x100
[<8032ee54>] __platform_driver_register+0x50/0x64
[<8084b094>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
to a HARDIRQ-irq-unsafe lock:
(prepare_lock){+.+...}
... which became HARDIRQ-irq-unsafe at:
... [<8005f030>] mark_lock+0x140/0x6ac
[<8005f604>] mark_held_locks+0x68/0x12c
[<8005f780>] trace_hardirqs_on_caller+0xb8/0x1d8
[<8005f8b4>] trace_hardirqs_on+0x14/0x18
[<8061a130>] mutex_trylock+0x180/0x20c
[<80480ad8>] clk_prepare_lock+0x14/0xe4
[<804816a4>] clk_notifier_register+0x28/0xf0
[<80015120>] twd_clk_init+0x50/0x68
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] 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#2);
lock(prepare_lock);
<Interrupt>
lock(&(&host->lock)->rlock#2);
*** DEADLOCK ***
3 locks held by kworker/u8:1/29:
#0: (kmmcd){.+.+.+}, at: [<8003db18>] process_one_work+0x128/0x468
#1: ((&(&host->detect)->work)){+.+.+.}, at: [<8003db18>] process_one_work+0x128/0x468
#2: (&(&host->lock)->rlock#2){-.-...}, at: [<804611f4>] sdhci_do_set_ios+0x20/0x720
the dependencies between HARDIRQ-irq-safe lock and the holding lock:
-> (&(&host->lock)->rlock#2){-.-...} ops: 330 {
IN-HARDIRQ-W at:
[<8005f030>] mark_lock+0x140/0x6ac
[<80060760>] __lock_acquire+0xb30/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061d2f0>] _raw_spin_lock+0x30/0x40
[<80460668>] sdhci_irq+0x24/0xa68
[<8006b1d4>] handle_irq_event_percpu+0x54/0x18c
[<8006b350>] handle_irq_event+0x44/0x64
[<8006e50c>] handle_fasteoi_irq+0xa0/0x170
[<8006a8f0>] generic_handle_irq+0x30/0x44
[<8000f238>] handle_IRQ+0x54/0xbc
[<8000864c>] gic_handle_irq+0x30/0x64
[<80013024>] __irq_svc+0x44/0x5c
[<80614c58>] printk+0x38/0x40
[<804622a8>] sdhci_add_host+0x844/0xbcc
[<80464948>] sdhci_esdhc_imx_probe+0x378/0x67c
[<8032ee88>] platform_drv_probe+0x20/0x50
[<8032d48c>] driver_probe_device+0x118/0x234
[<8032d690>] __driver_attach+0x9c/0xa0
[<8032b89c>] bus_for_each_dev+0x68/0x9c
[<8032cf44>] driver_attach+0x20/0x28
[<8032cbc8>] bus_add_driver+0x148/0x1f4
[<8032dce0>] driver_register+0x80/0x100
[<8032ee54>] __platform_driver_register+0x50/0x64
[<8084b094>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
IN-SOFTIRQ-W at:
[<8005f030>] mark_lock+0x140/0x6ac
[<80060204>] __lock_acquire+0x5d4/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061d40c>] _raw_spin_lock_irqsave+0x40/0x54
[<8045e4a4>] sdhci_tasklet_finish+0x1c/0x120
[<8002b538>] tasklet_action+0xa0/0x15c
[<8002b778>] __do_softirq+0x118/0x290
[<8002bcf4>] irq_exit+0xb4/0x10c
[<8000f240>] handle_IRQ+0x5c/0xbc
[<8000864c>] gic_handle_irq+0x30/0x64
[<80013024>] __irq_svc+0x44/0x5c
[<80614c58>] printk+0x38/0x40
[<804622a8>] sdhci_add_host+0x844/0xbcc
[<80464948>] sdhci_esdhc_imx_probe+0x378/0x67c
[<8032ee88>] platform_drv_probe+0x20/0x50
[<8032d48c>] driver_probe_device+0x118/0x234
[<8032d690>] __driver_attach+0x9c/0xa0
[<8032b89c>] bus_for_each_dev+0x68/0x9c
[<8032cf44>] driver_attach+0x20/0x28
[<8032cbc8>] bus_add_driver+0x148/0x1f4
[<8032dce0>] driver_register+0x80/0x100
[<8032ee54>] __platform_driver_register+0x50/0x64
[<8084b094>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
INITIAL USE at:
[<8005f030>] mark_lock+0x140/0x6ac
[<8005ff0c>] __lock_acquire+0x2dc/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061d40c>] _raw_spin_lock_irqsave+0x40/0x54
[<804611f4>] sdhci_do_set_ios+0x20/0x720
[<80461924>] sdhci_set_ios+0x30/0x3c
[<8044cea0>] mmc_power_up+0x6c/0xd0
[<8044dac4>] mmc_start_host+0x60/0x70
[<8044eb3c>] mmc_add_host+0x60/0x88
[<8046225c>] sdhci_add_host+0x7f8/0xbcc
[<80464948>] sdhci_esdhc_imx_probe+0x378/0x67c
[<8032ee88>] platform_drv_probe+0x20/0x50
[<8032d48c>] driver_probe_device+0x118/0x234
[<8032d690>] __driver_attach+0x9c/0xa0
[<8032b89c>] bus_for_each_dev+0x68/0x9c
[<8032cf44>] driver_attach+0x20/0x28
[<8032cbc8>] bus_add_driver+0x148/0x1f4
[<8032dce0>] driver_register+0x80/0x100
[<8032ee54>] __platform_driver_register+0x50/0x64
[<8084b094>] sdhci_esdhc_imx_driver_init+0x18/0x20
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
}
... key at: [<80e040e8>] __key.26952+0x0/0x8
... acquired at:
[<8005eb60>] check_usage+0x3d0/0x5c0
[<8005edac>] check_irq_usage+0x5c/0xb8
[<80060d38>] __lock_acquire+0x1108/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061a210>] mutex_lock_nested+0x54/0x3c0
[<80480b08>] clk_prepare_lock+0x44/0xe4
[<8048188c>] clk_get_rate+0x14/0x64
[<8046374c>] esdhc_pltfm_set_clock+0x20/0x2a4
[<8045d70c>] sdhci_set_clock+0x4c/0x498
[<80461518>] sdhci_do_set_ios+0x344/0x720
[<80461924>] sdhci_set_ios+0x30/0x3c
[<8044c390>] __mmc_set_clock+0x44/0x60
[<8044cd4c>] mmc_set_clock+0x10/0x14
[<8044f8f4>] mmc_init_card+0x1b4/0x1520
[<80450f00>] mmc_attach_mmc+0xb4/0x194
[<8044da08>] mmc_rescan+0x294/0x2f0
[<8003db94>] process_one_work+0x1a4/0x468
[<8003e850>] worker_thread+0x118/0x3e0
[<80044de0>] kthread+0xd4/0xf0
[<8000e9c8>] ret_from_fork+0x14/0x2c
the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock:
-> (prepare_lock){+.+...} ops: 395 {
HARDIRQ-ON-W at:
[<8005f030>] mark_lock+0x140/0x6ac
[<8005f604>] mark_held_locks+0x68/0x12c
[<8005f780>] trace_hardirqs_on_caller+0xb8/0x1d8
[<8005f8b4>] trace_hardirqs_on+0x14/0x18
[<8061a130>] mutex_trylock+0x180/0x20c
[<80480ad8>] clk_prepare_lock+0x14/0xe4
[<804816a4>] clk_notifier_register+0x28/0xf0
[<80015120>] twd_clk_init+0x50/0x68
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
SOFTIRQ-ON-W at:
[<8005f030>] mark_lock+0x140/0x6ac
[<8005f604>] mark_held_locks+0x68/0x12c
[<8005f7c8>] trace_hardirqs_on_caller+0x100/0x1d8
[<8005f8b4>] trace_hardirqs_on+0x14/0x18
[<8061a130>] mutex_trylock+0x180/0x20c
[<80480ad8>] clk_prepare_lock+0x14/0xe4
[<804816a4>] clk_notifier_register+0x28/0xf0
[<80015120>] twd_clk_init+0x50/0x68
[<80008980>] do_one_initcall+0x108/0x16c
[<8081cca4>] kernel_init_freeable+0x10c/0x1d0
[<80611c50>] kernel_init+0x10/0x120
[<8000e9c8>] ret_from_fork+0x14/0x2c
INITIAL USE at:
[<8005f030>] mark_lock+0x140/0x6ac
[<8005ff0c>] __lock_acquire+0x2dc/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061a0c8>] mutex_trylock+0x118/0x20c
[<80480ad8>] clk_prepare_lock+0x14/0xe4
[<80482af8>] __clk_init+0x1c/0x45c
[<8048306c>] _clk_register+0xd0/0x170
[<80483148>] clk_register+0x3c/0x7c
[<80483b4c>] clk_register_fixed_rate+0x88/0xd8
[<80483c04>] of_fixed_clk_setup+0x68/0x94
[<8084c6fc>] of_clk_init+0x44/0x68
[<808202b0>] time_init+0x2c/0x38
[<8081ca14>] start_kernel+0x1e4/0x368
[<10008074>] 0x10008074
}
... key at: [<808afebc>] prepare_lock+0x38/0x48
... acquired at:
[<8005eb94>] check_usage+0x404/0x5c0
[<8005edac>] check_irq_usage+0x5c/0xb8
[<80060d38>] __lock_acquire+0x1108/0x1cbc
[<800620d0>] lock_acquire+0x70/0x84
[<8061a210>] mutex_lock_nested+0x54/0x3c0
[<80480b08>] clk_prepare_lock+0x44/0xe4
[<8048188c>] clk_get_rate+0x14/0x64
[<8046374c>] esdhc_pltfm_set_clock+0x20/0x2a4
[<8045d70c>] sdhci_set_clock+0x4c/0x498
[<80461518>] sdhci_do_set_ios+0x344/0x720
[<80461924>] sdhci_set_ios+0x30/0x3c
[<8044c390>] __mmc_set_clock+0x44/0x60
[<8044cd4c>] mmc_set_clock+0x10/0x14
[<8044f8f4>] mmc_init_card+0x1b4/0x1520
[<80450f00>] mmc_attach_mmc+0xb4/0x194
[<8044da08>] mmc_rescan+0x294/0x2f0
[<8003db94>] process_one_work+0x1a4/0x468
[<8003e850>] worker_thread+0x118/0x3e0
[<80044de0>] kthread+0xd4/0xf0
[<8000e9c8>] ret_from_fork+0x14/0x2c
stack backtrace:
CPU: 2 PID: 29 Comm: kworker/u8:1 Not tainted 3.13.0-rc1+ #285
Workqueue: kmmcd mmc_rescan
Backtrace:
[<80012160>] (dump_backtrace+0x0/0x10c) from [<80012438>] (show_stack+0x18/0x1c)
r6:00000000 r5:00000000 r4:8088ecc8 r3:bfa11200
[<80012420>] (show_stack+0x0/0x1c) from [<80616b14>] (dump_stack+0x84/0x9c)
[<80616a90>] (dump_stack+0x0/0x9c) from [<8005ebb4>] (check_usage+0x424/0x5c0)
r5:80979940 r4:bfa29b44
[<8005e790>] (check_usage+0x0/0x5c0) from [<8005edac>] (check_irq_usage+0x5c/0xb8)
[<8005ed50>] (check_irq_usage+0x0/0xb8) from [<80060d38>] (__lock_acquire+0x1108/0x1cbc)
r8:bfa115e8 r7:80df9884 r6:80dafa9c r5:00000003 r4:bfa115d0
[<8005fc30>] (__lock_acquire+0x0/0x1cbc) from [<800620d0>] (lock_acquire+0x70/0x84)
[<80062060>] (lock_acquire+0x0/0x84) from [<8061a210>] (mutex_lock_nested+0x54/0x3c0)
r7:bfa11200 r6:80dafa9c r5:00000000 r4:80480b08
[<8061a1bc>] (mutex_lock_nested+0x0/0x3c0) from [<80480b08>] (clk_prepare_lock+0x44/0xe4)
[<80480ac4>] (clk_prepare_lock+0x0/0xe4) from [<8048188c>] (clk_get_rate+0x14/0x64)
r6:03197500 r5:bf0e9aa8 r4:bf827400 r3:808ae128
[<80481878>] (clk_get_rate+0x0/0x64) from [<8046374c>] (esdhc_pltfm_set_clock+0x20/0x2a4)
r5:bf0e9aa8 r4:bf0e9c40
[<8046372c>] (esdhc_pltfm_set_clock+0x0/0x2a4) from [<8045d70c>] (sdhci_set_clock+0x4c/0x498)
[<8045d6c0>] (sdhci_set_clock+0x0/0x498) from [<80461518>] (sdhci_do_set_ios+0x344/0x720)
r8:0000003b r7:20000113 r6:bf0e9d68 r5:bf0e9aa8 r4:bf0e9c40
r3:00000000
[<804611d4>] (sdhci_do_set_ios+0x0/0x720) from [<80461924>] (sdhci_set_ios+0x30/0x3c)
r9:00000004 r8:bf131000 r7:bf131048 r6:00000000 r5:bf0e9aa8
r4:bf0e9800
[<804618f4>] (sdhci_set_ios+0x0/0x3c) from [<8044c390>] (__mmc_set_clock+0x44/0x60)
r5:03197500 r4:bf0e9800
[<8044c34c>] (__mmc_set_clock+0x0/0x60) from [<8044cd4c>] (mmc_set_clock+0x10/0x14)
r5:00000000 r4:bf0e9800
[<8044cd3c>] (mmc_set_clock+0x0/0x14) from [<8044f8f4>] (mmc_init_card+0x1b4/0x1520)
[<8044f740>] (mmc_init_card+0x0/0x1520) from [<80450f00>] (mmc_attach_mmc+0xb4/0x194)
[<80450e4c>] (mmc_attach_mmc+0x0/0x194) from [<8044da08>] (mmc_rescan+0x294/0x2f0)
r5:8065f358 r4:bf0e9af8
[<8044d774>] (mmc_rescan+0x0/0x2f0) from [<8003db94>] (process_one_work+0x1a4/0x468)
r8:00000000 r7:bfa29eb0 r6:bf80dc00 r5:bf0e9af8 r4:bf9e3f00
r3:8044d774
[<8003d9f0>] (process_one_work+0x0/0x468) from [<8003e850>] (worker_thread+0x118/0x3e0)
[<8003e738>] (worker_thread+0x0/0x3e0) from [<80044de0>] (kthread+0xd4/0xf0)
[<80044d0c>] (kthread+0x0/0xf0) from [<8000e9c8>] (ret_from_fork+0x14/0x2c)
r7:00000000 r6:00000000 r5:80044d0c r4:bf9e7f00
Fixes:
|
||
| .. | ||
| accessibility | ||
| acpi | ||
| amba | ||
| ata | ||
| atm | ||
| auxdisplay | ||
| base | ||
| bcma | ||
| block | ||
| bluetooth | ||
| bus | ||
| cdrom | ||
| char | ||
| clk | ||
| clocksource | ||
| connector | ||
| cpufreq | ||
| cpuidle | ||
| crypto | ||
| dca | ||
| devfreq | ||
| dio | ||
| dma | ||
| edac | ||
| eisa | ||
| extcon | ||
| firewire | ||
| firmware | ||
| fmc | ||
| gpio | ||
| gpu | ||
| hid | ||
| hsi | ||
| hv | ||
| hwmon | ||
| hwspinlock | ||
| i2c | ||
| ide | ||
| idle | ||
| iio | ||
| infiniband | ||
| input | ||
| iommu | ||
| ipack | ||
| irqchip | ||
| isdn | ||
| leds | ||
| lguest | ||
| macintosh | ||
| mailbox | ||
| md | ||
| media | ||
| memory | ||
| memstick | ||
| message | ||
| mfd | ||
| misc | ||
| mmc | ||
| mtd | ||
| net | ||
| nfc | ||
| ntb | ||
| nubus | ||
| of | ||
| oprofile | ||
| parisc | ||
| parport | ||
| pci | ||
| pcmcia | ||
| phy | ||
| pinctrl | ||
| platform | ||
| pnp | ||
| power | ||
| powercap | ||
| pps | ||
| ps3 | ||
| ptp | ||
| pwm | ||
| rapidio | ||
| regulator | ||
| remoteproc | ||
| reset | ||
| rpmsg | ||
| rtc | ||
| s390 | ||
| sbus | ||
| scsi | ||
| sfi | ||
| sh | ||
| sn | ||
| spi | ||
| ssb | ||
| staging | ||
| target | ||
| tc | ||
| thermal | ||
| tty | ||
| uio | ||
| usb | ||
| uwb | ||
| vfio | ||
| vhost | ||
| video | ||
| virt | ||
| virtio | ||
| vlynq | ||
| vme | ||
| w1 | ||
| watchdog | ||
| xen | ||
| zorro | ||
| Kconfig | ||
| Makefile | ||