* [BUG] removing and reinserting imx-media causes kernel to explode
@ 2019-08-14 9:25 Russell King - ARM Linux admin
2019-08-18 22:41 ` Steve Longerbeam
0 siblings, 1 reply; 2+ messages in thread
From: Russell King - ARM Linux admin @ 2019-08-14 9:25 UTC (permalink / raw)
To: Steve Longerbeam
Cc: linux-media, open list:STAGING SUBSYSTEM, Fabio Estevam,
Pengutronix Kernel Team, Greg Kroah-Hartman, Sascha Hauer,
open list, Sakari Ailus, NXP Linux Team, Philipp Zabel,
Shawn Guo, Mauro Carvalho Chehab, Ezequiel Garcia,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
I just did this:
rmmod imx-media
modprobe imx-media
and was greeted by the below kernel messages. I don't think this has
been the first issue I found with the iMX media stuff involving a module
unload/reload cycle - may I suggest that this is added to the testing
regime for this code? Thanks.
imx-media: Removing imx-media
ipu1_vdic: Removing
ipu1_ic_prp: Removing
ipu1_ic_prpenc: Removing
ipu1_ic_prpvf: Removing
ipu2_vdic: Removing
ipu2_ic_prp: Removing
ipu2_ic_prpenc: Removing
ipu2_ic_prpvf: Removing
imx_media: module is from the staging directory, the quality is unknown, you have been warned.
ipu2_ic_prpvf: Registered ipu2_ic_prpvf capture as /dev/video2
imx-media: subdev ipu2_ic_prpvf bound
ipu2_ic_prpenc: Registered ipu2_ic_prpenc capture as /dev/video3
imx-media: subdev ipu2_ic_prpenc bound
imx-media: subdev ipu2_ic_prp bound
imx-media: subdev ipu2_vdic bound
ipu1_ic_prpvf: Registered ipu1_ic_prpvf capture as /dev/video4
imx-media: subdev ipu1_ic_prpvf bound
ipu1_ic_prpenc: Registered ipu1_ic_prpenc capture as /dev/video5
imx-media: subdev ipu1_ic_prpenc bound
imx-media: subdev ipu1_ic_prp bound
imx-media: subdev ipu1_vdic bound
kobject (ddca68f0): tried to init an initialized object, something is seriously wrong.
CPU: 1 PID: 31521 Comm: modprobe Tainted: G C 5.2.0+ #325
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[<c0019560>] (unwind_backtrace) from [<c0014734>] (show_stack+0x10/0x14)
[<c0014734>] (show_stack) from [<c084573c>] (dump_stack+0x9c/0xd4)
[<c084573c>] (dump_stack) from [<c084a878>] (kobject_init+0x74/0x94)
[<c084a878>] (kobject_init) from [<c04b2a70>] (device_initialize+0x1c/0xec)
[<c04b2a70>] (device_initialize) from [<c04b4ad0>] (device_register+0xc/0x18)
[<c04b4ad0>] (device_register) from [<c0599484>] (__video_register_device+0x9b4/0x1228)
[<c0599484>] (__video_register_device) from [<bf129fac>] (imx_media_capture_device_register+0x44/0x1f4 [imx_media_capture])
[<bf129fac>] (imx_media_capture_device_register [imx_media_capture]) from [<bf130bf8>] (csi_registered+0x154/0x19c [imx_media_csi])
[<bf130bf8>] (csi_registered [imx_media_csi]) from [<c05a062c>] (v4l2_device_register_subdev+0xd0/0x164)
[<c05a062c>] (v4l2_device_register_subdev) from [<c05abed0>] (v4l2_async_match_notify+0x1c/0x130)
[<c05abed0>] (v4l2_async_match_notify) from [<c05ac02c>] (v4l2_async_notifier_try_all_subdevs+0x48/0x94)
[<c05ac02c>] (v4l2_async_notifier_try_all_subdevs) from [<c05ac6f4>] (__v4l2_async_notifier_register+0xa8/0x110)
[<c05ac6f4>] (__v4l2_async_notifier_register) from [<c05ac7ec>] (v4l2_async_notifier_register+0x3c/0x54)
[<c05ac7ec>] (v4l2_async_notifier_register) from [<bf01ef64>] (imx_media_dev_notifier_register+0x2c/0x70 [imx_media])
[<bf01ef64>] (imx_media_dev_notifier_register [imx_media]) from [<bf01e090>] (imx_media_probe+0x3c/0x8c [imx_media])
[<bf01e090>] (imx_media_probe [imx_media]) from [<c04b9178>] (platform_drv_probe+0x48/0x98)
[<c04b9178>] (platform_drv_probe) from [<c04b7298>] (really_probe+0x1d8/0x2c0)
[<c04b7298>] (really_probe) from [<c04b7554>] (driver_probe_device+0x5c/0x174)
[<c04b7554>] (driver_probe_device) from [<c04b7814>] (device_driver_attach+0x58/0x60)
[<c04b7814>] (device_driver_attach) from [<c04b78a0>] (__driver_attach+0x84/0xc0)
[<c04b78a0>] (__driver_attach) from [<c04b5968>] (bus_for_each_dev+0x58/0x7c)
[<c04b5968>] (bus_for_each_dev) from [<c04b6768>] (bus_add_driver+0xd0/0x1cc)
[<c04b6768>] (bus_add_driver) from [<c04b848c>] (driver_register+0x7c/0x110)
[<c04b848c>] (driver_register) from [<c000b05c>] (do_one_initcall+0x74/0x308)
[<c000b05c>] (do_one_initcall) from [<c00d9b78>] (do_init_module+0x5c/0x1f4)
[<c00d9b78>] (do_init_module) from [<c00d8be4>] (load_module+0x19a4/0x2020)
[<c00d8be4>] (load_module) from [<c00d9438>] (sys_finit_module+0x8c/0x98)
[<c00d9438>] (sys_finit_module) from [<c0009000>] (ret_fast_syscall+0x0/0x28)
Exception stack(0xdb677fa8 to 0xdb677ff0)
7fa0: 00b04170 00000000 00000003 007bd84c 00000000 00b05cb8
7fc0: 00b04170 00000000 1ee84500 0000017b 00040000 00000000 00b04eb8 00000000
7fe0: be958178 be958168 007b54bb b6c28712
ipu1_csi0: Registered ipu1_csi0 capture as /dev/video6
imx-media: subdev ipu1_csi0 bound
kobject (dcd780f0): tried to init an initialized object, something is seriously wrong.
CPU: 1 PID: 31521 Comm: modprobe Tainted: G C 5.2.0+ #325
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[<c0019560>] (unwind_backtrace) from [<c0014734>] (show_stack+0x10/0x14)
[<c0014734>] (show_stack) from [<c084573c>] (dump_stack+0x9c/0xd4)
[<c084573c>] (dump_stack) from [<c084a878>] (kobject_init+0x74/0x94)
[<c084a878>] (kobject_init) from [<c04b2a70>] (device_initialize+0x1c/0xec)
[<c04b2a70>] (device_initialize) from [<c04b4ad0>] (device_register+0xc/0x18)
[<c04b4ad0>] (device_register) from [<c0599484>] (__video_register_device+0x9b4/0x1228)
[<c0599484>] (__video_register_device) from [<bf129fac>] (imx_media_capture_device_register+0x44/0x1f4 [imx_media_capture])
[<bf129fac>] (imx_media_capture_device_register [imx_media_capture]) from [<bf130bf8>] (csi_registered+0x154/0x19c [imx_media_csi])
[<bf130bf8>] (csi_registered [imx_media_csi]) from [<c05a062c>] (v4l2_device_register_subdev+0xd0/0x164)
[<c05a062c>] (v4l2_device_register_subdev) from [<c05abed0>] (v4l2_async_match_notify+0x1c/0x130)
[<c05abed0>] (v4l2_async_match_notify) from [<c05ac02c>] (v4l2_async_notifier_try_all_subdevs+0x48/0x94)
[<c05ac02c>] (v4l2_async_notifier_try_all_subdevs) from [<c05ac6f4>] (__v4l2_async_notifier_register+0xa8/0x110)
[<c05ac6f4>] (__v4l2_async_notifier_register) from [<c05ac7ec>] (v4l2_async_notifier_register+0x3c/0x54)
[<c05ac7ec>] (v4l2_async_notifier_register) from [<bf01ef64>] (imx_media_dev_notifier_register+0x2c/0x70 [imx_media])
[<bf01ef64>] (imx_media_dev_notifier_register [imx_media]) from [<bf01e090>] (imx_media_probe+0x3c/0x8c [imx_media])
[<bf01e090>] (imx_media_probe [imx_media]) from [<c04b9178>] (platform_drv_probe+0x48/0x98)
[<c04b9178>] (platform_drv_probe) from [<c04b7298>] (really_probe+0x1d8/0x2c0)
[<c04b7298>] (really_probe) from [<c04b7554>] (driver_probe_device+0x5c/0x174)
[<c04b7554>] (driver_probe_device) from [<c04b7814>] (device_driver_attach+0x58/0x60)
[<c04b7814>] (device_driver_attach) from [<c04b78a0>] (__driver_attach+0x84/0xc0)
[<c04b78a0>] (__driver_attach) from [<c04b5968>] (bus_for_each_dev+0x58/0x7c)
[<c04b5968>] (bus_for_each_dev) from [<c04b6768>] (bus_add_driver+0xd0/0x1cc)
[<c04b6768>] (bus_add_driver) from [<c04b848c>] (driver_register+0x7c/0x110)
[<c04b848c>] (driver_register) from [<c000b05c>] (do_one_initcall+0x74/0x308)
[<c000b05c>] (do_one_initcall) from [<c00d9b78>] (do_init_module+0x5c/0x1f4)
[<c00d9b78>] (do_init_module) from [<c00d8be4>] (load_module+0x19a4/0x2020)
[<c00d8be4>] (load_module) from [<c00d9438>] (sys_finit_module+0x8c/0x98)
[<c00d9438>] (sys_finit_module) from [<c0009000>] (ret_fast_syscall+0x0/0x28)
Exception stack(0xdb677fa8 to 0xdb677ff0)
7fa0: 00b04170 00000000 00000003 007bd84c 00000000 00b05cb8
7fc0: 00b04170 00000000 1ee84500 0000017b 00040000 00000000 00b04eb8 00000000
7fe0: be958178 be958168 007b54bb b6c28712
8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000064
pgd = db720000
[00000064] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in: imx_media(C+) caam_jr imx_media_vdic(C) imx_media_ic(C) snd_soc_imx_spdif imx_thermal imx_media_csi(C) imx_media_capture(C) snd_soc_imx_audmux imx219 snd_soc_sgtl5000 imx6_mipi_csi2(C) nvmem_imx_ocotp mux_mmio video_mux caam mux_core error imx_sdma virt_dma coda v4l2_mem2mem rc_cec snd_soc_fsl_spdif imx_vdoa videobuf2_dma_contig snd_soc_fsl_ssi imx_pcm_dma dw_hdmi_ahb_audio dw_hdmi_cec etnaviv gpu_sched v4l2_fwnode imx_media_common(C) imx6q_cpufreq rc_pinnacle_pctv_hd nfsd [last unloaded: imx_media]
CPU: 1 PID: 31521 Comm: modprobe Tainted: G C 5.2.0+ #325
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
PC is at kobject_get+0x10/0x54
LR is at klist_node_init+0x40/0x58
pc : [<c084a61c>] lr : [<c084a304>] psr: 200d0013
sp : db677b20 ip : 600d0013 fp : dcd78000
r10: c08c9044 r9 : c0c97d20 r8 : 00000000
r7 : 00000000 r6 : deb34c10 r5 : deb049c0 r4 : 00000044
r3 : c04b23bc r2 : c0c17c94 r1 : dcc04930 r0 : 00000044
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 10c5387d Table: 2b72004a DAC: 00000051
Process modprobe (pid: 31521, stack limit = 0xdb676218)
Stack: (0xdb677b20 to 0xdb678000)
7b20: 00000000 dcc9f300 dcc04930 c084a304 00000000 deb049c0 dcc04930 c084a3cc
7b40: 00000000 dcd780f0 00000000 c04b47b4 3a3138f0 c13c0037 00000001 c04b2af8
7b60: c13c6208 00000007 dcd780f0 000003ac c13c6608 c0599484 c0cb7f90 60060013
7b80: 00000000 00000001 00000001 c0ab9740 00000001 00000000 1bef8335 8c000030
7ba0: 7e000f99 00000080 00000000 00000000 00000000 ddca7040 dcd78000 ddca7858
7bc0: ddca784c 00000001 00000000 ddca71a0 00000000 bf129fac bf12ad00 ddd1c96c
7be0: da51f2c0 60060013 c05975cc c0089908 00000000 00000002 ddd1c938 ddca7970
7c00: db677c18 c139a374 00000003 00000000 ddca784c c0862d4c 00000001 db677c18
7c20: 00000003 ddca7970 ddd1c840 ddca784c 00000003 00000000 ddca784c 00000003
7c40: ddca7840 ddca7858 ddca78a0 00000001 ddca784c bf130bf8 00000001 ddca7a6c
7c60: c0cb8120 00002017 bf02089c ddca784c ddd1ca60 00000000 c0c97ebc ddd1ca60
7c80: 00000030 bf02089c 00000124 c05a062c d5a1c8c0 ddca784c d5a1c8c0 ddd1cbb8
7ca0: c0c97ebc c05abed0 d5a1c8c0 ddca784c ddd1cbb8 c0c97f08 c0c97ebc c05ac02c
7cc0: ddd1cbb4 ddd1cbb8 ddd1cbc8 ddd1cbd0 00000000 c05ac6f4 ddd1cbb8 00000000
7ce0: bf02089c c13c3b8c 00000000 c05ac7ec bf020518 ddd1c840 00000000 bf01ef64
7d00: fffffffe ddd1c840 00000000 bf01e090 bf01e054 deb34c10 00000000 c04b9178
7d20: c04b9130 deb34c10 c13c3a88 00000000 c13c3b8c c04b7298 deb34c10 00000000
7d40: bf02089c 00000000 c0c1e560 00000028 deb34c10 c04b7554 deb34c10 bf02089c
7d60: 00000000 deb34c10 00000000 bf02089c 00000000 c0c1e560 00000028 dce1ac00
7d80: 00000124 c04b7814 bf02089c deb34c10 00000000 c04b78a0 deb34c10 bf02089c
7da0: c04b781c c04b5968 df0812a4 deb04a10 bf02089c c403d700 c0c84cc0 c04b6768
7dc0: bf0206bc bf02089c bf023000 bf02089c bf023000 c0cb7c20 00000000 c04b848c
7de0: c04b8d04 c0cb6bc0 bf023000 c000b05c 00000001 c0c1eca4 c0cb6daf 00000cc0
7e00: 00000040 c00d9b3c 00000008 c00aa7e8 d5a1c700 c01b2110 dddcfb80 df001e00
7e20: 00000001 00000cc0 df001e00 000ecf78 c00d8b98 bf020900 c0c1e560 bf020900
7e40: d5a1c700 bf020900 c0cb8120 bf020948 dce1ac00 c00d9b78 c0cb8120 bf020948
7e60: c0cb6ca7 c0c1e560 bf020900 c00d8be4 bf02090c 00007fff bf020900 c00d688c
7e80: bf02469e c13abc64 f0a21000 bf020b20 000000c5 db677eb4 000051b8 c01cf3a0
7ea0: 00000001 00000000 c01cf4a8 00000006 00000000 00000000 00000000 bf01f0b8
7ec0: 00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000
7ee0: 00000000 00000000 00000000 00000000 00000003 7fffffff 00000000 00000000
7f00: 00000003 007bd84c db676000 0000017b 00000000 c00d9438 7fffffff 00000000
7f20: 00000003 b6ccb000 00000000 f0a21000 000051b8 00000000 00000002 f0a2371d
7f40: f0a23a80 f0a21000 000051b8 f0a25b50 f0a23d49 f0a24b58 00002b50 00003170
7f60: 00001624 000035c8 00000000 00000000 00000000 00001614 00000027 00000028
7f80: 00000020 00000000 00000017 00000000 00b04170 00000000 1ee84500 0000017b
7fa0: c00091c4 c0009000 00b04170 00000000 00000003 007bd84c 00000000 00b05cb8
7fc0: 00b04170 00000000 1ee84500 0000017b 00040000 00000000 00b04eb8 00000000
7fe0: be958178 be958168 007b54bb b6c28712 800e0030 00000003 00000000 00000000
[<c084a61c>] (kobject_get) from [<c084a304>] (klist_node_init+0x40/0x58)
[<c084a304>] (klist_node_init) from [<c084a3cc>] (klist_add_tail+0x18/0x44)
[<c084a3cc>] (klist_add_tail) from [<c04b47b4>] (device_add+0x3dc/0x59c)
[<c04b47b4>] (device_add) from [<c0599484>] (__video_register_device+0x9b4/0x1228)
[<c0599484>] (__video_register_device) from [<bf129fac>] (imx_media_capture_device_register+0x44/0x1f4 [imx_media_capture])
[<bf129fac>] (imx_media_capture_device_register [imx_media_capture]) from [<bf130bf8>] (csi_registered+0x154/0x19c [imx_media_csi])
[<bf130bf8>] (csi_registered [imx_media_csi]) from [<c05a062c>] (v4l2_device_register_subdev+0xd0/0x164)
[<c05a062c>] (v4l2_device_register_subdev) from [<c05abed0>] (v4l2_async_match_notify+0x1c/0x130)
[<c05abed0>] (v4l2_async_match_notify) from [<c05ac02c>] (v4l2_async_notifier_try_all_subdevs+0x48/0x94)
[<c05ac02c>] (v4l2_async_notifier_try_all_subdevs) from [<c05ac6f4>] (__v4l2_async_notifier_register+0xa8/0x110)
[<c05ac6f4>] (__v4l2_async_notifier_register) from [<c05ac7ec>] (v4l2_async_notifier_register+0x3c/0x54)
[<c05ac7ec>] (v4l2_async_notifier_register) from [<bf01ef64>] (imx_media_dev_notifier_register+0x2c/0x70 [imx_media])
[<bf01ef64>] (imx_media_dev_notifier_register [imx_media]) from [<bf01e090>] (imx_media_probe+0x3c/0x8c [imx_media])
[<bf01e090>] (imx_media_probe [imx_media]) from [<c04b9178>] (platform_drv_probe+0x48/0x98)
[<c04b9178>] (platform_drv_probe) from [<c04b7298>] (really_probe+0x1d8/0x2c0)
[<c04b7298>] (really_probe) from [<c04b7554>] (driver_probe_device+0x5c/0x174)
[<c04b7554>] (driver_probe_device) from [<c04b7814>] (device_driver_attach+0x58/0x60)
[<c04b7814>] (device_driver_attach) from [<c04b78a0>] (__driver_attach+0x84/0xc0)
[<c04b78a0>] (__driver_attach) from [<c04b5968>] (bus_for_each_dev+0x58/0x7c)
[<c04b5968>] (bus_for_each_dev) from [<c04b6768>] (bus_add_driver+0xd0/0x1cc)
[<c04b6768>] (bus_add_driver) from [<c04b848c>] (driver_register+0x7c/0x110)
[<c04b848c>] (driver_register) from [<c000b05c>] (do_one_initcall+0x74/0x308)
[<c000b05c>] (do_one_initcall) from [<c00d9b78>] (do_init_module+0x5c/0x1f4)
[<c00d9b78>] (do_init_module) from [<c00d8be4>] (load_module+0x19a4/0x2020)
[<c00d8be4>] (load_module) from [<c00d9438>] (sys_finit_module+0x8c/0x98)
[<c00d9438>] (sys_finit_module) from [<c0009000>] (ret_fast_syscall+0x0/0x28)
Exception stack(0xdb677fa8 to 0xdb677ff0)
7fa0: 00b04170 00000000 00000003 007bd84c 00000000 00b05cb8
7fc0: 00b04170 00000000 1ee84500 0000017b 00040000 00000000 00b04eb8 00000000
7fe0: be958178 be958168 007b54bb b6c28712
Code: e92d4010 e2504000 e24dd008 0a000004 (e5d43020)
---[ end trace c0709acc637cb5de ]---
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [BUG] removing and reinserting imx-media causes kernel to explode
2019-08-14 9:25 [BUG] removing and reinserting imx-media causes kernel to explode Russell King - ARM Linux admin
@ 2019-08-18 22:41 ` Steve Longerbeam
0 siblings, 0 replies; 2+ messages in thread
From: Steve Longerbeam @ 2019-08-18 22:41 UTC (permalink / raw)
To: Russell King - ARM Linux admin
Cc: linux-media, open list:STAGING SUBSYSTEM, Fabio Estevam,
Pengutronix Kernel Team, Greg Kroah-Hartman, Sascha Hauer,
open list, Sakari Ailus, NXP Linux Team, Philipp Zabel,
Shawn Guo, Mauro Carvalho Chehab, Ezequiel Garcia,
moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE
On 8/14/19 2:25 AM, Russell King - ARM Linux admin wrote:
> I just did this:
>
> rmmod imx-media
> modprobe imx-media
>
> and was greeted by the below kernel messages.
Yes this needs fixing, the CSI needs to check first that it is already
registered before going through the ->registered() steps. Posting a patch.
> I don't think this has
> been the first issue I found with the iMX media stuff involving a module
> unload/reload cycle - may I suggest that this is added to the testing
> regime for this code? Thanks.
I do test module unload/reload cycles, but v4l2-async does not support
re-registering subdevices unless the subdevice is basically completely
removed and re-probed, so there won't be a working media device if only
imx-media is reloaded. So I have always unloaded/reloaded all modules
for every entity in the graph, i.e.:
rmmod imx6_media imx6_media_csi imx6_mipi_csi2 ov5640 video_mux
imx_media_common
(replace ov5640 with your imx219 sensor).
But I'll make sure to test single module unload/reload cycles in the future.
But note after applying the patch mentioned above to CSI ->registered()
callback, there are list corruption backtraces, see [1]. The root cause
is that both media_device_register_entity() and media_entity_pads_init()
add the same graph objects for the entity's pads, so duplicate pad
objects are added to the media device pads list. Removing the pad object
creation in media_device_register_entity() fixes the list corruption.
Sending a patch for that also.
This is a problem for any entity that sets its ->num_pads to a non-zero
value before media_device_register_entity() is called. For example, the
following will produce the same list corruption backtrace:
rmmod video-mux
modprobe video-mux
rmmod video-mux
Steve
[1]
rmmod imx6-media
modprobe imx6-media
rmmod imx6-media
[ 249.387953] WARNING: CPU: 2 PID: 843 at lib/list_debug.c:53
__list_del_entry_valid+0xa0/0xdc
[ 249.396442] list_del corruption. prev->next should be e8fb0510, but
was e93b5914
[ 249.404076] Modules linked in: imx6_media_csi(C) imx6_media(C-)
imx6_mipi_csi2(C) bnep dw_hdmi_ahb_audio dw_hdmi_cec ov5640 mux_mmio
video_mux mux_core dw_hdmi_imx dw_hdmi coda_vpu cec imx_vdoa
videobuf2_vmalloc imx_media_common(C) v4l2_fwnode imx_ldb imxdrm
imx_ipu_v3 [last unloaded: imx6_media_csi]
[ 249.430956] CPU: 2 PID: 843 Comm: rmmod Tainted: G C
5.3.0-rc4-01115-g62119fd20fda #5
[ 249.440115] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 249.446689] [<c0113a58>] (unwind_backtrace) from [<c010de5c>]
(show_stack+0x10/0x14)
[ 249.454462] [<c010de5c>] (show_stack) from [<c0bdfdcc>]
(dump_stack+0xd8/0x110)
[ 249.461804] [<c0bdfdcc>] (dump_stack) from [<c0128c28>]
(__warn+0xe0/0x10c)
[ 249.468789] [<c0128c28>] (__warn) from [<c0128c98>]
(warn_slowpath_fmt+0x44/0x6c)
[ 249.476301] [<c0128c98>] (warn_slowpath_fmt) from [<c04e8e00>]
(__list_del_entry_valid+0xa0/0xdc)
[ 249.485207] [<c04e8e00>] (__list_del_entry_valid) from [<c07e2b8c>]
(media_gobj_destroy.part.4+0x30/0x64)
[ 249.494802] [<c07e2b8c>] (media_gobj_destroy.part.4) from
[<c07e01d4>] (__media_device_unregister_entity+0xa8/0xcc)
[ 249.505259] [<c07e01d4>] (__media_device_unregister_entity) from
[<c07e0224>] (media_device_unregister_entity+0x2c/0x38)
[ 249.516157] [<c07e0224>] (media_device_unregister_entity) from
[<c07ece34>] (v4l2_device_unregister_subdev+0x90/0xb4)
[ 249.526793] [<c07ece34>] (v4l2_device_unregister_subdev) from
[<c07f9668>] (v4l2_async_cleanup+0x10/0x3c)
[ 249.536382] [<c07f9668>] (v4l2_async_cleanup) from [<c07f9730>]
(v4l2_async_notifier_unbind_all_subdevs+0x9c/0x10c)
[ 249.546840] [<c07f9730>] (v4l2_async_notifier_unbind_all_subdevs)
from [<c07f9700>] (v4l2_async_notifier_unbind_all_subdevs+0x6c/0x10c)
[ 249.559035] [<c07f9700>] (v4l2_async_notifier_unbind_all_subdevs)
from [<c07fa3a0>] (__v4l2_async_notifier_unregister.part.4+0xc/0x44)
[ 249.571140] [<c07fa3a0>] (__v4l2_async_notifier_unregister.part.4)
from [<c07fa408>] (v4l2_async_notifier_unregister+0x30/0x50)
[ 249.582665] [<c07fa408>] (v4l2_async_notifier_unregister) from
[<bf03e020>] (imx_media_remove+0x20/0x54 [imx6_media])
[ 249.593389] [<bf03e020>] (imx_media_remove [imx6_media]) from
[<c064a684>] (platform_drv_remove+0x20/0x40)
[ 249.603068] [<c064a684>] (platform_drv_remove) from [<c0648b50>]
(device_release_driver_internal+0xdc/0x1ac)
[ 249.612917] [<c0648b50>] (device_release_driver_internal) from
[<c0648c7c>] (driver_detach+0x44/0x80)
[ 249.622164] [<c0648c7c>] (driver_detach) from [<c0647404>]
(bus_remove_driver+0x5c/0xd8)
[ 249.630287] [<c0647404>] (bus_remove_driver) from [<c01d305c>]
(sys_delete_module+0x17c/0x20c)
[ 249.638926] [<c01d305c>] (sys_delete_module) from [<c0101000>]
(ret_fast_syscall+0x0/0x28)
[ 249.647205] Exception stack(0xe90d5fa8 to 0xe90d5ff0)
[ 249.652278] 5fa0: beed5d6c 00000003 01401134
00000800 4f13b6f4 00002002
[ 249.660475] 5fc0: beed5d6c 00000003 beed5b80 00000081 beed5e78
00000001 00000000 014010f8
[ 249.668669] 5fe0: 0003b2c4 beed5b4c 0001f248 4f1012dc
[ 249.673859] irq event stamp: 4113
[ 249.677267] hardirqs last enabled at (4131): [<c018d810>]
console_unlock+0x408/0x5f8
[ 249.685125] hardirqs last disabled at (4138): [<c018d490>]
console_unlock+0x88/0x5f8
[ 249.692970] softirqs last enabled at (4154): [<c0102580>]
__do_softirq+0x360/0x524
[ 249.700735] softirqs last disabled at (4165): [<c01306ec>]
irq_exit+0x12c/0x17c
[ 249.708134] ---[ end trace 6fde63f19c7b10b8 ]---
Steve
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-08-18 22:41 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2019-08-14 9:25 [BUG] removing and reinserting imx-media causes kernel to explode Russell King - ARM Linux admin
2019-08-18 22:41 ` Steve Longerbeam
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