[Letux-kernel] New LetuxOS Kernels - strcmp(NULL)

Sun Jun 24 22:44:54 CEST 2018

> 
> Well, absence of Oopses doesn't say too much. Blacklisting pwm_bl
> would likely give the same result according to my tests.
well, the problem was moved into the sound system by blacklisting
bl

> 
> How many did you see with not blacklisting anything? 100% or something significantly high?
> 

3% kernel BUG at ../drivers/base/devres.c:104!

29% (strcmp) from [<c04266bc>] (pinctrl_generic_add_group+0x50/0xc4)

68% no Oopses

the devres backtrace is a more than 500ms before iio_charge output!

[   12.860412] omap3isp 480bc000.isp: 480bc000.isp supply vdd-csiphy1 not found, using dummy regulator
[   12.926818] omap3isp 480bc000.isp: 480bc000.isp supply vdd-csiphy2 not found, using dummy regulator
[   12.955352] pwm-backlight backlight: backlight supply power not found, using dummy regulator
[   12.964996] (NULL device *): hwmon: 'gta04-battery' is not a valid name attribute, please fix
[   12.974243] ------------[ cut here ]------------
[   12.979064] kernel BUG at ../drivers/base/devres.c:104!
[   12.984527] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[   12.990631] Modules linked in: panel_dpi(+) snd_soc_gtm601(+) pwm_omap_dmtimer(+) connector_analog_tv(+) generic_adc_battery(+) pwm_bl(+) b
mp280_spi omap3_isp(+) videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common bq27xxx_battery_hdq bq27xxx_battery omap2430 omap
_hdq ov9655 v4l2_fwnode v4l2_common itg3200 bmp280_i2c bmp280 at24 videodev bma180 hmc5843_i2c hmc5843_core industrialio_triggered_buffer tsc2
007 kfifo_buf leds_tca6507 media snd_soc_omap_mcbsp snd_soc_omap snd_pcm_dmaengine gpio_twl4030 phy_twl4030_usb musb_hdrc twl4030_vibra snd_so
c_twl4030 twl4030_pwrbutton twl4030_charger twl4030_madc industrialio gnss_w2sg0004 gnss w2cbw003_bluetooth ehci_omap omapdss omapdss_base cec
 overlay
[   13.056152] CPU: 0 PID: 1224 Comm: kworker/0:3 Not tainted 4.17.2-letux+ #2
[   13.063446] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[   13.070007] Workqueue: events deferred_probe_work_func
[   13.075378] PC is at add_dr+0xc/0x28
[   13.079132] LR is at devres_add+0x28/0x38
[   13.083312] pc : [<c04cf04c>]    lr : [<c04cf140>]    psr: a00d0093
[   13.089874] sp : dbee1e00  ip : 00000000  fp : c0b98df0
[   13.095336] r10: 0000002a  r9 : df9ee208  r8 : ddac4c00
[   13.100799] r7 : 00000000  r6 : cf895b50  r5 : ddac4c10  r4 : ddac4d7c
[   13.107635] r3 : 00000011  r2 : 800d0013  r1 : cf895b40  r0 : ddac4c10
[   13.114440] Flags: NzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment none
[   13.122009] Control: 10c5387d  Table: 9bdec019  DAC: 00000051
[   13.128021] Process kworker/0:3 (pid: 1224, stack limit = 0x(ptrval))
[   13.134765] Stack: (0xdbee1e00 to 0xdbee2000)
[   13.139312] 1e00: cf913780 cf895b50 ddac4c10 c048ec44 00000001 cf913b90 dbee1e50 ddac4c10
[   13.147888] 1e20: ddac4c00 bf248264 00000000 00000001 cf8946e0 0000002c 00000009 00000000
[   13.156402] 1e40: 00000000 cf8f54d0 00000001 c02b02f4 00000000 0000000a 00000009 00000000
[   13.164978] 1e60: 00000000 cf895b90 ffffffea 00000000 00000000 00000000 00000000 00000000
[   13.173522] 1e80: ddac4c10 bf248074 ddac4c10 bf24a014 00000000 00000000 bf24a014 c04cdb88
[   13.182098] 1ea0: ddac4c10 c0bd1bc8 c0bd1bc4 c04cc19c 00000000 dbee1ee8 c04cc344 ddac4c44
[   13.190643] 1ec0: dbee0000 c0b02d00 00000000 c04ca9f0 dd81be6c dbfa40b8 ddac4c10 c0b66540
[   13.199188] 1ee0: 00000001 c04cbed0 ddac4c10 00000001 00000000 ddac4c10 c0b66540 ddac4c10
[   13.207702] 1f00: 00000000 c04cb498 ddac4c10 c0b66320 df9b0c80 c04cb9bc dbe61880 c0b66354
[   13.216278] 1f20: df9b0c80 00000000 df9b3f00 c014716c dbe61880 c0b66354 ffff8fdf dbe61880
[   13.224822] 1f40: df9b0c80 df9b0c80 dbee0000 df9b0c98 c0b02d00 dbe61898 00000008 c0148104
[   13.233367] 1f60: 00000000 dbeca880 dbeca900 dbee0000 dbe61880 c0147e60 00000000 dd8b1ee8
[   13.241912] 1f80: dbeca89c c014c250 dbee0000 dbeca900 c014c120 00000000 00000000 00000000
[   13.250457] 1fa0: 00000000 00000000 00000000 c01010e8 00000000 00000000 00000000 00000000
[   13.259002] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   13.267578] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[   13.276123] [<c04cf04c>] (add_dr) from [<c04cf140>] (devres_add+0x28/0x38)
[   13.283294] [<c04cf140>] (devres_add) from [<c048ec44>] (_devm_regulator_get+0x5c/0x78)
[   13.291687] [<c048ec44>] (_devm_regulator_get) from [<bf248264>] (pwm_backlight_probe+0x1f0/0x4dc [pwm_bl])
[   13.301879] [<bf248264>] (pwm_backlight_probe [pwm_bl]) from [<c04cdb88>] (platform_drv_probe+0x50/0x9c)
[   13.311798] [<c04cdb88>] (platform_drv_probe) from [<c04cc19c>] (driver_probe_device+0x240/0x308)
[   13.321105] [<c04cc19c>] (driver_probe_device) from [<c04ca9f0>] (bus_for_each_drv+0x84/0x8c)
[   13.330017] [<c04ca9f0>] (bus_for_each_drv) from [<c04cbed0>] (__device_attach+0x98/0x100)
[   13.338684] [<c04cbed0>] (__device_attach) from [<c04cb498>] (bus_probe_device+0x28/0x80)
[   13.347229] [<c04cb498>] (bus_probe_device) from [<c04cb9bc>] (deferred_probe_work_func+0x108/0x120)
[   13.356811] [<c04cb9bc>] (deferred_probe_work_func) from [<c014716c>] (process_one_work+0x220/0x464)
[   13.366363] [<c014716c>] (process_one_work) from [<c0148104>] (worker_thread+0x2a4/0x3e8)
[   13.374938] [<c0148104>] (worker_thread) from [<c014c250>] (kthread+0x130/0x148)
[   13.382690] [<c014c250>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[   13.390228] Exception stack(0xdbee1fb0 to 0xdbee1ff8)
[   13.395507] 1fa0:                                     00000000 00000000 00000000 00000000
[   13.404052] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   13.412628] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   13.419555] Code: eaf52d64 e5913000 e1510003 0a000000 (e7f001f2) 
[   13.425903] ---[ end trace 0e2922f6280d4840 ]---
[   13.430938] note: kworker/0:3[1224] exited with preempt_count 1
[   13.454772] wwan_on_off_init: wwan_on_off_init
[   13.472869] panel-dpi lcd: lcd supply vcc not found, using dummy regulator
[   13.480712] omap3isp 480bc000.isp: Revision 15.0 found

So that might be something else... but also bl

> And then please replace the strange
> 
> 			memcpy(properties + sizeof(*(psy_desc->properties)) * index,
> 					&gab_dyn_props[chan],
> 					sizeof(gab_dyn_props[chan]));
> 
> by
> 
> 			properties[index] = gab_dyn_props[chan];
> 
> and run your auto-repeated tests. If it goes down (to 0%) we have found it.

will do.

Regards,
Andreas
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