Hi, On Thu, 9 Jan 2020 at 20:39, @lex <alex.mob...@gmail.com> wrote: > > Hi Clément, > > Looks like Kernel 5.5 will be affected too. Yes but if a fix is sent it will be backported to all the kernels affected still maintained.
What command do you do to reproduce this? Thanks, Clément > > Thank you. > > BR, > @lex > > > On Thursday, January 9, 2020 at 2:03:43 PM UTC-3, Clément Péron wrote: >> >> Hi @lex, >> >> On Thu, 9 Jan 2020 at 16:51, @lex <alex....@gmail.com> wrote: >> > >> > Just adding some info, 5.3.y has the same issue. >> >> Yes the bug is not fix mainline. >> >> I will open a discussion with the PWM maintainer >> >> Regards, >> Clement >> >> > >> > On Thursday, January 9, 2020 at 9:55:54 AM UTC-3, @lex wrote: >> >> >> >> I asked this because i have not touched the pwm-sun4i driver code, Only >> >> the MIPI-DSI on top of 5.4.8. >> >> >> >> On Thursday, January 9, 2020 at 9:25:11 AM UTC-3, @lex wrote: >> >>> >> >>> Thank you Vasily for the explanation. >> >>> >> >>> Is this a known bug or i have possibly introduced it while patching the >> >>> kernel? >> >>> >> >>> On Wednesday, January 8, 2020 at 9:51:03 PM UTC-3, Vasily Khoruzhick >> >>> wrote: >> >>>> >> >>>> The issue is that sun4i_pwm_apply() calls sun4i_pwm_calculate() which >> >>>> calls clk_get_rate() while holding a spinlock and clk_get_rate() may >> >>>> sleep. >> >>>> >> >>>> It's a bug in pwm-sun4i driver. >> >>>> >> >>>> On Wed, Jan 8, 2020 at 4:19 PM @lex <alex....@gmail.com> wrote: >> >>>> > >> >>>> > I am doing some experiments with LCD7" with the kernel 5.4.8 and >> >>>> > occasionally i get this crash. >> >>>> > Can someone explain or give some directions on how to find the >> >>>> > offending error based on the crash log? Any idea what could be >> >>>> > causing this? >> >>>> > >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.681388] BUG: scheduling >> >>>> > while atomic: gsd-backlight-h/3978/0x00000002 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688221] Modules linked in: >> >>>> > fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec >> >>>> > panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem >> >>>> > crct10dif_ce sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx >> >>>> > dw_hdmi videobuf2_memops axp20x_adc cec videobuf2_v4l2 >> >>>> > snd_soc_simple_card sunxi_cir axp20x_usb_power axp20x_ac_power >> >>>> > snd_soc_simple_card_utils pinctrl_axp209 axp20x_battery >> >>>> > phy_sun6i_mipi_dphy rc_core videobuf2_common mali(O) sun6i_mipi_dsi >> >>>> > sun50i_codec_analog videodev sun8i_adda_pr_regmap crc_ccitt goodix >> >>>> > sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend sun4i_tcon >> >>>> > sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6 >> >>>> > nf_defrag_ipv6 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688331] CPU: 3 PID: 3978 >> >>>> > Comm: gsd-backlight-h Tainted: G C O 5.4.8 #1 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688334] Hardware name: >> >>>> > Pine64+ (DT) >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688339] Call trace: >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688357] >> >>>> > dump_backtrace+0x0/0x150 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688364] >> >>>> > show_stack+0x14/0x20 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688374] >> >>>> > dump_stack+0xb4/0xd8 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688384] >> >>>> > __schedule_bug+0x50/0x70 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688392] >> >>>> > __schedule+0x4bc/0x510 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688397] schedule+0x40/0xd0 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688403] >> >>>> > schedule_preempt_disabled+0x20/0x38 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688410] >> >>>> > __mutex_lock.isra.10+0x150/0x568 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688416] >> >>>> > __mutex_lock_slowpath+0x10/0x18 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688422] >> >>>> > mutex_lock+0x38/0x40 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688430] >> >>>> > clk_prepare_lock+0x40/0xa0 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688437] >> >>>> > clk_get_rate+0x1c/0x70 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688446] >> >>>> > sun4i_pwm_apply+0xb4/0x450 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688453] >> >>>> > pwm_apply_state+0x64/0x1e8 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688464] >> >>>> > pwm_backlight_update_status+0xb8/0x198 [pwm_bl] >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688473] >> >>>> > backlight_device_set_brightness+0x64/0xb8 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688480] >> >>>> > brightness_store+0x78/0x90 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688488] >> >>>> > dev_attr_store+0x14/0x28 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688496] >> >>>> > sysfs_kf_write+0x3c/0x50 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688501] >> >>>> > kernfs_fop_write+0x144/0x230 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688511] >> >>>> > __vfs_write+0x18/0x38 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688517] >> >>>> > vfs_write+0xb4/0x1e0 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688524] >> >>>> > ksys_write+0x68/0xf8 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688530] >> >>>> > __arm64_sys_write+0x18/0x20 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688540] >> >>>> > el0_svc_common.constprop.2+0x64/0x160 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688547] >> >>>> > el0_svc_handler+0x20/0x80 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688552] el0_svc+0x8/0xc >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.688694] BUG: scheduling >> >>>> > while atomic: gsd-backlight-h/3978/0x00000000 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695480] Modules linked in: >> >>>> > fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec >> >>>> > panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem >> >>>> > crct10dif_ce sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx >> >>>> > dw_hdmi videobuf2_memops axp20x_adc cec videobuf2_v4l2 >> >>>> > snd_soc_simple_card sunxi_cir axp20x_usb_power axp20x_ac_power >> >>>> > snd_soc_simple_card_utils pinctrl_axp209 axp20x_battery >> >>>> > phy_sun6i_mipi_dphy rc_core videobuf2_common mali(O) sun6i_mipi_dsi >> >>>> > sun50i_codec_analog videodev sun8i_adda_pr_regmap crc_ccitt goodix >> >>>> > sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend sun4i_tcon >> >>>> > sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6 >> >>>> > nf_defrag_ipv6 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695558] CPU: 3 PID: 3978 >> >>>> > Comm: gsd-backlight-h Tainted: G WC O 5.4.8 #1 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695561] Hardware name: >> >>>> > Pine64+ (DT) >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695564] Call trace: >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695579] >> >>>> > dump_backtrace+0x0/0x150 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695583] >> >>>> > show_stack+0x14/0x20 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695591] >> >>>> > dump_stack+0xb4/0xd8 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695600] >> >>>> > __schedule_bug+0x50/0x70 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695605] >> >>>> > __schedule+0x4bc/0x510 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695610] schedule+0x40/0xd0 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695615] >> >>>> > do_notify_resume+0x1e0/0x398 >> >>>> > Jan 8 23:49:43 pine64-plus kernel: [ 5144.695620] >> >>>> > work_pending+0x8/0x10 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.894318] BUG: scheduling >> >>>> > while atomic: gsd-backlight-h/3987/0x00000002 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901147] Modules linked in: >> >>>> > fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec >> >>>> > panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem >> >>>> > crct10dif_ce sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx >> >>>> > dw_hdmi videobuf2_memops axp20x_adc cec videobuf2_v4l2 >> >>>> > snd_soc_simple_card sunxi_cir axp20x_usb_power axp20x_ac_power >> >>>> > snd_soc_simple_card_utils pinctrl_axp209 axp20x_battery >> >>>> > phy_sun6i_mipi_dphy rc_core videobuf2_common mali(O) sun6i_mipi_dsi >> >>>> > sun50i_codec_analog videodev sun8i_adda_pr_regmap crc_ccitt goodix >> >>>> > sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend sun4i_tcon >> >>>> > sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6 >> >>>> > nf_defrag_ipv6 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901246] CPU: 0 PID: 3987 >> >>>> > Comm: gsd-backlight-h Tainted: G WC O 5.4.8 #1 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901250] Hardware name: >> >>>> > Pine64+ (DT) >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901254] Call trace: >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901271] >> >>>> > dump_backtrace+0x0/0x150 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901277] >> >>>> > show_stack+0x14/0x20 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901286] >> >>>> > dump_stack+0xb4/0xd8 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901296] >> >>>> > __schedule_bug+0x50/0x70 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901303] >> >>>> > __schedule+0x4bc/0x510 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901307] schedule+0x40/0xd0 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901313] >> >>>> > schedule_preempt_disabled+0x20/0x38 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901319] >> >>>> > __mutex_lock.isra.10+0x150/0x568 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901324] >> >>>> > __mutex_lock_slowpath+0x10/0x18 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901330] >> >>>> > mutex_lock+0x38/0x40 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901337] >> >>>> > clk_prepare_lock+0x40/0xa0 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901343] >> >>>> > clk_get_rate+0x1c/0x70 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901352] >> >>>> > sun4i_pwm_apply+0xb4/0x450 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901357] >> >>>> > pwm_apply_state+0x64/0x1e8 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901368] >> >>>> > pwm_backlight_update_status+0xb8/0x198 [pwm_bl] >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901375] >> >>>> > backlight_device_set_brightness+0x64/0xb8 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901381] >> >>>> > brightness_store+0x78/0x90 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901389] >> >>>> > dev_attr_store+0x14/0x28 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901396] >> >>>> > sysfs_kf_write+0x3c/0x50 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901401] >> >>>> > kernfs_fop_write+0x144/0x230 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901409] >> >>>> > __vfs_write+0x18/0x38 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901415] >> >>>> > vfs_write+0xb4/0x1e0 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901421] >> >>>> > ksys_write+0x68/0xf8 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901427] >> >>>> > __arm64_sys_write+0x18/0x20 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901435] >> >>>> > el0_svc_common.constprop.2+0x64/0x160 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901441] >> >>>> > el0_svc_handler+0x20/0x80 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901446] el0_svc+0x8/0xc >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.901612] BUG: scheduling >> >>>> > while atomic: gsd-backlight-h/3987/0x00000000 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908388] Modules linked in: >> >>>> > fuse rfkill dw_hdmi_i2s_audio snd_soc_hdmi_codec >> >>>> > panel_feiyang_fy07024di26a30d sunxi_cedrus(C) v4l2_mem2mem >> >>>> > crct10dif_ce sun8i_drm_hdmi videobuf2_dma_contig snd_soc_spdif_tx >> >>>> > dw_hdmi videobuf2_memops axp20x_adc cec videobuf2_v4l2 >> >>>> > snd_soc_simple_card sunxi_cir axp20x_usb_power axp20x_ac_power >> >>>> > snd_soc_simple_card_utils pinctrl_axp209 axp20x_battery >> >>>> > phy_sun6i_mipi_dphy rc_core videobuf2_common mali(O) sun6i_mipi_dsi >> >>>> > sun50i_codec_analog videodev sun8i_adda_pr_regmap crc_ccitt goodix >> >>>> > sun8i_codec sun4i_i2s mc sun4i_drm sun4i_frontend sun4i_tcon >> >>>> > sun8i_mixer sun8i_tcon_top pwm_bl ip_tables x_tables ipv6 >> >>>> > nf_defrag_ipv6 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908479] CPU: 0 PID: 3987 >> >>>> > Comm: gsd-backlight-h Tainted: G WC O 5.4.8 #1 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908482] Hardware name: >> >>>> > Pine64+ (DT) >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908486] Call trace: >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908500] >> >>>> > dump_backtrace+0x0/0x150 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908507] >> >>>> > show_stack+0x14/0x20 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908517] >> >>>> > dump_stack+0xb4/0xd8 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908526] >> >>>> > __schedule_bug+0x50/0x70 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908533] >> >>>> > __schedule+0x4bc/0x510 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908538] schedule+0x40/0xd0 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908545] >> >>>> > do_notify_resume+0x1e0/0x398 >> >>>> > Jan 8 23:49:45 pine64-plus kernel: [ 5146.908551] >> >>>> > work_pending+0x8/0x10 >> >>>> > >> >>>> > >> >>>> > >> >>>> > B.R >> >>>> > >> >>>> > -- >> >>>> > You received this message because you are subscribed to the Google >> >>>> > Groups "linux-sunxi" group. >> >>>> > To unsubscribe from this group and stop receiving emails from it, >> >>>> > send an 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