Re: [PATCH v1 000/107] media: ti-vpe: cal: Add media controller support

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Hi Laurent,

On 15/06/2020 02:57, Laurent Pinchart wrote:
> Hello,
> 
> This small patch series adds media controller support to the ti-cal
> driver.

I did some small testing on AM6, and after third module unload I got:

[   75.292797] OF: ERROR: Bad of_node_put() on /interconnect@100000/i2c@2010000/ov5640@3c/port/endpoint
[   75.292839] ------------[ cut here ]------------
[   75.292849] refcount_t: addition on 0; use-after-free.
[   75.292856] WARNING: CPU: 0 PID: 421 at lib/refcount.c:25 refcount_warn_saturate+0xa0/0x148
[   75.292861] Modules linked in: ov5640 ti_cal(-) tidss ti_tfp410 tc358767 display_connector phy_j721e_wiz phy_cadence_torrent panel_simple drm_kms_helper drm drm_panel_orienta
tion_quirks cfbfillrect cfbimgblt cfbcopyarea [last unloaded: ov5640]
[   75.292935] CPU: 0 PID: 421 Comm: rmmod Not tainted 5.8.0-rc1-00107-g5de7cabe3995 #6
[   75.292941] Hardware name: Texas Instruments AM654 Base Board (DT)
[   75.292946] pstate: 00000085 (nzcv daIf -PAN -UAO BTYPE=--)
[   75.292951] pc : refcount_warn_saturate+0xa0/0x148
[   75.292956] lr : refcount_warn_saturate+0xa0/0x148
[   75.292961] sp : ffff80001324f760
[   75.292965] x29: ffff80001324f760 x28: ffff0a00ffffff05 
[   75.292978] x27: ffff800011f2731a x26: ffff800010e21c28 
[   75.292991] x25: ffff800010b6d468 x24: ffff00087ff30338 
[   75.293003] x23: ffff800011f276d8 x22: 0000000000000005 
[   75.293016] x21: 0000000000000005 x20: ffff800011f276d8 
[   75.293028] x19: ffff00087ff30378 x18: 0000000000000000 
[   75.293041] x17: 0000000000000000 x16: 0000000000000000 
[   75.293054] x15: 0000000000000004 x14: 0000000000048963 
[   75.293066] x13: 0000000000000000 x12: 0000000000000000 
[   75.293079] x11: ffff8000116e1540 x10: 0000000000000000 
[   75.293091] x9 : 000000006d17ab9f x8 : 612d657375203b30 
[   75.293104] x7 : 206e6f206e6f6974 x6 : ffff00087f823c12 
[   75.293116] x5 : 0000000000000000 x4 : ffff00087f823bb0 
[   75.293128] x3 : 0000000000000000 x2 : 0000000000000023 
[   75.293141] x1 : 2e76dc4eebb2b000 x0 : 0000000000000000 
[   75.293153] Call trace:
[   75.293158]  refcount_warn_saturate+0xa0/0x148
[   75.293163]  kobject_get+0x40/0xb0
[   75.293168]  of_node_get+0x20/0x38
[   75.293172]  of_fwnode_get+0x34/0x58
[   75.293177]  fwnode_get_nth_parent+0x34/0x78
[   75.293182]  fwnode_full_name_string+0x4c/0xc8
[   75.293187]  device_node_string+0x318/0x3f0
[   75.293192]  pointer+0x204/0x2e0
[   75.293196]  vsnprintf+0x204/0x728
[   75.293201]  vscnprintf+0x30/0x68
[   75.293206]  vprintk_store+0x64/0x210
[   75.293210]  vprintk_emit+0xd4/0x340
[   75.293215]  vprintk_default+0x3c/0x48
[   75.293219]  vprintk_func+0xec/0x258
[   75.293224]  printk+0x60/0x84
[   75.293229]  of_node_release+0xcc/0xd8
[   75.293233]  kobject_put+0x8c/0x200
[   75.293238]  of_node_put+0x18/0x28
[   75.293243]  cal_camerarx_destroy+0x28/0x50 [ti_cal]
[   75.293247]  cal_remove+0xa4/0x110 [ti_cal]
[   75.293252]  platform_drv_remove+0x2c/0x50
[   75.293257]  device_release_driver_internal+0xfc/0x1d0
[   75.293262]  driver_detach+0x50/0xe0
[   75.293267]  bus_remove_driver+0x5c/0xd8
[   75.293272]  driver_unregister+0x30/0x60
[   75.293276]  platform_driver_unregister+0x14/0x20
[   75.293281]  cal_pdrv_exit+0x1c/0xb060 [ti_cal]
[   75.293286]  __arm64_sys_delete_module+0x1a8/0x250
[   75.293291]  el0_svc_common.constprop.0+0x74/0x198
[   75.293296]  do_el0_svc+0x24/0x90
[   75.293300]  el0_sync_handler+0x9c/0x1b8
[   75.293305]  el0_sync+0x158/0x180
[   75.293309] irq event stamp: 4884
[   75.293315] hardirqs last  enabled at (4883): [<ffff800010235b14>] slab_free_freelist_hook+0xf4/0x190
[   75.293322] hardirqs last disabled at (4884): [<ffff8000100cf090>] vprintk_emit+0x88/0x340
[   75.293328] softirqs last  enabled at (4150): [<ffff800010000db8>] _stext+0x5b8/0x5fc
[   75.293333] softirqs last disabled at (4135): [<ffff800010047f7c>] irq_exit+0x114/0x128
[   75.293339] ---[ end trace 3ee89555752a3b07 ]---
[   75.293344] ------------[ cut here ]------------
[   75.293349] refcount_t: underflow; use-after-free.
[   75.293356] WARNING: CPU: 0 PID: 421 at lib/refcount.c:28 refcount_warn_saturate+0xf4/0x148
[   75.293360] Modules linked in: ov5640 ti_cal(-) tidss ti_tfp410 tc358767 display_connector phy_j721e_wiz phy_cadence_torrent panel_simple drm_kms_helper drm drm_panel_orienta
tion_quirks cfbfillrect cfbimgblt cfbcopyarea [last unloaded: ov5640]
[   75.293433] CPU: 0 PID: 421 Comm: rmmod Tainted: G        W         5.8.0-rc1-00107-g5de7cabe3995 #6
[   75.293438] Hardware name: Texas Instruments AM654 Base Board (DT)
[   75.293443] pstate: 00000085 (nzcv daIf -PAN -UAO BTYPE=--)
[   75.293448] pc : refcount_warn_saturate+0xf4/0x148
[   75.293453] lr : refcount_warn_saturate+0xf4/0x148
[   75.293458] sp : ffff80001324f740
[   75.293462] x29: ffff80001324f740 x28: ffff0a00ffffff05 
[   75.293475] x27: ffff800011f2731a x26: ffff800010e21c28 
[   75.293487] x25: ffff800010b6d468 x24: ffff00087ff30338 
[   75.293500] x23: ffff800011f276d8 x22: 0000000000000005 
[   75.293512] x21: 0000000000000005 x20: ffff00087ff30208 
[   75.293525] x19: ffff00087ff30378 x18: 0000000000000000 
[   75.293537] x17: 0000000000000000 x16: 0000000000000000 
[   75.293550] x15: 0000000000000004 x14: 0000000000048963 
[   75.293562] x13: 0000000000000000 x12: 0000000000000000 
[   75.293574] x11: ffff8000116e1540 x10: 0000000000000000 
[   75.293587] x9 : 000000006d17ab9f x8 : 72657466612d6573 
[   75.293600] x7 : 75203b776f6c6672 x6 : ffff00087f8246d1 
[   75.293612] x5 : 0000000000000000 x4 : ffff00087f823bb0 
[   75.293625] x3 : 0000000000000000 x2 : 0000000000000023 
[   75.293637] x1 : 2e76dc4eebb2b000 x0 : 0000000000000000 
[   75.293650] Call trace:
[   75.293655]  refcount_warn_saturate+0xf4/0x148
[   75.293659]  kobject_put+0x140/0x200
[   75.293664]  of_node_put+0x18/0x28
[   75.293668]  of_fwnode_put+0x34/0x48
[   75.293673]  fwnode_get_next_parent+0x48/0x80
[   75.293678]  fwnode_get_nth_parent+0x4c/0x78
[   75.293683]  fwnode_full_name_string+0x4c/0xc8
[   75.293688]  device_node_string+0x318/0x3f0
[   75.293693]  pointer+0x204/0x2e0
[   75.293697]  vsnprintf+0x204/0x728
[   75.293702]  vscnprintf+0x30/0x68
[   75.293706]  vprintk_store+0x64/0x210
[   75.293711]  vprintk_emit+0xd4/0x340
[   75.293715]  vprintk_default+0x3c/0x48
[   75.293720]  vprintk_func+0xec/0x258
[   75.293724]  printk+0x60/0x84
[   75.293729]  of_node_release+0xcc/0xd8
[   75.293734]  kobject_put+0x8c/0x200
[   75.293738]  of_node_put+0x18/0x28
[   75.293743]  cal_camerarx_destroy+0x28/0x50 [ti_cal]
[   75.293748]  cal_remove+0xa4/0x110 [ti_cal]
[   75.293753]  platform_drv_remove+0x2c/0x50
[   75.293758]  device_release_driver_internal+0xfc/0x1d0
[   75.293763]  driver_detach+0x50/0xe0
[   75.293768]  bus_remove_driver+0x5c/0xd8
[   75.293772]  driver_unregister+0x30/0x60
[   75.293777]  platform_driver_unregister+0x14/0x20
[   75.293782]  cal_pdrv_exit+0x1c/0xb060 [ti_cal]
[   75.293787]  __arm64_sys_delete_module+0x1a8/0x250
[   75.293792]  el0_svc_common.constprop.0+0x74/0x198
[   75.293796]  do_el0_svc+0x24/0x90
[   75.293801]  el0_sync_handler+0x9c/0x1b8
[   75.293806]  el0_sync+0x158/0x180
[   75.293810] irq event stamp: 4884
[   75.293816] hardirqs last  enabled at (4883): [<ffff800010235b14>] slab_free_freelist_hook+0xf4/0x190
[   75.293822] hardirqs last disabled at (4884): [<ffff8000100cf090>] vprintk_emit+0x88/0x340
[   75.293828] softirqs last  enabled at (4150): [<ffff800010000db8>] _stext+0x5b8/0x5fc
[   75.293834] softirqs last disabled at (4135): [<ffff800010047f7c>] irq_exit+0x114/0x128
[   75.293839] ---[ end trace 3ee89555752a3b08 ]---
[   75.293844] ------------[ cut here ]------------
[   75.293849] refcount_t: saturated; leaking memory.
[   75.293855] WARNING: CPU: 0 PID: 421 at lib/refcount.c:22 refcount_warn_saturate+0x74/0x148
[   75.293859] Modules linked in: ov5640 ti_cal(-) tidss ti_tfp410 tc358767 display_connector phy_j721e_wiz phy_cadence_torrent panel_simple drm_kms_helper drm drm_panel_orienta
tion_quirks cfbfillrect cfbimgblt cfbcopyarea [last unloaded: ov5640]
[   75.293932] CPU: 0 PID: 421 Comm: rmmod Tainted: G        W         5.8.0-rc1-00107-g5de7cabe3995 #6
[   75.293938] Hardware name: Texas Instruments AM654 Base Board (DT)
[   75.293943] pstate: 00000085 (nzcv daIf -PAN -UAO BTYPE=--)
[   75.293948] pc : refcount_warn_saturate+0x74/0x148
[   75.293952] lr : refcount_warn_saturate+0x74/0x148
[   75.293957] sp : ffff80001324f760
[   75.293961] x29: ffff80001324f760 x28: ffff0a00ffffff05 
[   75.293974] x27: ffff800011f2731a x26: ffff800010e21c28 
[   75.293986] x25: ffff800010b6d468 x24: ffff00087ff30338 
[   75.293999] x23: ffff800011f276d8 x22: 0000000000000004 
[   75.294011] x21: 0000000000000004 x20: ffff0000ffffff00 
[   75.294024] x19: ffff00087ff30378 x18: 0000000000000000 
[   75.294036] x17: 0000000000000000 x16: 0000000000000000 
[   75.294049] x15: 0000000000000004 x14: 0000000000048963 
[   75.294061] x13: 0000000000000000 x12: 0000000000000000 
[   75.294073] x11: ffff8000116e1540 x10: 0000000000000000 
[   75.294086] x9 : 00000000fffffffe x8 : 6c203b6465746172 
[   75.294098] x7 : 75746173203a745f x6 : ffff00087f8251c4 
[   75.294111] x5 : 0000000000000000 x4 : ffff00087f823bb0 
[   75.294123] x3 : 0000000000000000 x2 : 0000000000000023 
[   75.294136] x1 : 2e76dc4eebb2b000 x0 : 0000000000000000 
[   75.294148] Call trace:
[   75.294153]  refcount_warn_saturate+0x74/0x148
[   75.294157]  kobject_get+0x78/0xb0
[   75.294162]  of_node_get+0x20/0x38
[   75.294166]  of_fwnode_get+0x34/0x58
[   75.294171]  fwnode_get_nth_parent+0x34/0x78
[   75.294176]  fwnode_full_name_string+0x4c/0xc8
[   75.294181]  device_node_string+0x318/0x3f0
[   75.294186]  pointer+0x204/0x2e0
[   75.294190]  vsnprintf+0x204/0x728
[   75.294195]  vscnprintf+0x30/0x68
[   75.294199]  vprintk_store+0x64/0x210
[   75.294204]  vprintk_emit+0xd4/0x340
[   75.294208]  vprintk_default+0x3c/0x48
[   75.294213]  vprintk_func+0xec/0x258
[   75.294218]  printk+0x60/0x84
[   75.294222]  of_node_release+0xcc/0xd8
[   75.294227]  kobject_put+0x8c/0x200
[   75.294231]  of_node_put+0x18/0x28
[   75.294236]  cal_camerarx_destroy+0x28/0x50 [ti_cal]
[   75.294241]  cal_remove+0xa4/0x110 [ti_cal]
[   75.294246]  platform_drv_remove+0x2c/0x50
[   75.294251]  device_release_driver_internal+0xfc/0x1d0
[   75.294255]  driver_detach+0x50/0xe0
[   75.294260]  bus_remove_driver+0x5c/0xd8
[   75.294265]  driver_unregister+0x30/0x60
[   75.294270]  platform_driver_unregister+0x14/0x20
[   75.294275]  cal_pdrv_exit+0x1c/0xb060 [ti_cal]
[   75.294280]  __arm64_sys_delete_module+0x1a8/0x250
[   75.294285]  el0_svc_common.constprop.0+0x74/0x198
[   75.294289]  do_el0_svc+0x24/0x90
[   75.294294]  el0_sync_handler+0x9c/0x1b8
[   75.294299]  el0_sync+0x158/0x180
[   75.294303] irq event stamp: 4884
[   75.294309] hardirqs last  enabled at (4883): [<ffff800010235b14>] slab_free_freelist_hook+0xf4/0x190
[   75.294315] hardirqs last disabled at (4884): [<ffff8000100cf090>] vprintk_emit+0x88/0x340
[   75.294320] softirqs last  enabled 
[   75.294329] Lost 2 message(s)!
[   76.258340] CPU: 1 PID: 421 Comm: rmmod Tainted: G        W         5.8.0-rc1-00107-g5de7cabe3995 #6
[   76.267490] Hardware name: Texas Instruments AM654 Base Board (DT)
[   76.273689] Call trace:
[   76.276160]  dump_backtrace+0x0/0x1d8
[   76.279843]  show_stack+0x18/0x28
[   76.283177]  dump_stack+0xe4/0x150
[   76.286596]  of_node_release+0xd0/0xd8
[   76.290360]  kobject_put+0x8c/0x200
[   76.293864]  of_node_put+0x18/0x28
[   76.297296]  cal_camerarx_destroy+0x28/0x50 [ti_cal]
[   76.302283]  cal_remove+0xa4/0x110 [ti_cal]
[   76.306484]  platform_drv_remove+0x2c/0x50
[   76.310597]  device_release_driver_internal+0xfc/0x1d0
[   76.315748]  driver_detach+0x50/0xe0
[   76.319338]  bus_remove_driver+0x5c/0xd8
[   76.323274]  driver_unregister+0x30/0x60
[   76.327211]  platform_driver_unregister+0x14/0x20
[   76.331936]  cal_pdrv_exit+0x1c/0xb060 [ti_cal]
[   76.336483]  __arm64_sys_delete_module+0x1a8/0x250
[   76.341289]  el0_svc_common.constprop.0+0x74/0x198
[   76.346094]  do_el0_svc+0x24/0x90
[   76.349426]  el0_sync_handler+0x9c/0x1b8
[   76.353361]  el0_sync+0x158/0x180

 Tomi

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki



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