linux-kernel - Re: [PATCH] venus: pm_helpers: Fix warning in OPP during probe

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Date:   Tue, 2 Aug 2022 09:46:26 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>
Cc:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: [PATCH] venus: pm_helpers: Fix warning in OPP during probe

On 01-08-22, 18:16, Stanimir Varbanov wrote:
> Fix the following WARN triggered during Venus driver probe on
> 5.19.0-rc8-next-20220728:
> 
>  WARNING: CPU: 7 PID: 339 at drivers/opp/core.c:2471 dev_pm_opp_set_config+0x49c/0x610
>  Modules linked in: qcom_spmi_adc5 rtc_pm8xxx qcom_spmi_adc_tm5 leds_qcom_lpg led_class_multicolor
>   qcom_pon qcom_vadc_common venus_core(+) qcom_spmi_temp_alarm v4l2_mem2mem videobuf2_v4l2 msm(+)
>   videobuf2_common crct10dif_ce spi_geni_qcom snd_soc_sm8250 i2c_qcom_geni gpu_sched
>   snd_soc_qcom_common videodev qcom_q6v5_pas soundwire_qcom drm_dp_aux_bus qcom_stats
>   drm_display_helper qcom_pil_info soundwire_bus snd_soc_lpass_va_macro mc qcom_q6v5
>   phy_qcom_snps_femto_v2 qcom_rng snd_soc_lpass_macro_common snd_soc_lpass_wsa_macro
>   lpass_gfm_sm8250 slimbus qcom_sysmon qcom_common qcom_glink_smem qmi_helpers
>   qcom_wdt mdt_loader socinfo icc_osm_l3 display_connector
>   drm_kms_helper qnoc_sm8250 drm fuse ip_tables x_tables ipv6
>  CPU: 7 PID: 339 Comm: systemd-udevd Not tainted 5.19.0-rc8-next-20220728 #4
>  Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)
>  pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
>  pc : dev_pm_opp_set_config+0x49c/0x610
>  lr : dev_pm_opp_set_config+0x58/0x610
>  sp : ffff8000093c3710
>  x29: ffff8000093c3710 x28: ffffbca3959d82b8 x27: ffff8000093c3d00
>  x26: ffffbca3959d8e08 x25: ffff4396cac98118 x24: ffff4396c0e24810
>  x23: ffff4396c4272c40 x22: ffff4396c0e24810 x21: ffff8000093c3810
>  x20: ffff4396cac36800 x19: ffff4396cac96800 x18: 0000000000000000
>  x17: 0000000000000003 x16: ffffbca3f4edf198 x15: 0000001cba64a858
>  x14: 0000000000000180 x13: 000000000000017e x12: 0000000000000000
>  x11: 0000000000000002 x10: 0000000000000a60 x9 : ffff8000093c35c0
>  x8 : ffff4396c4273700 x7 : ffff43983efca6c0 x6 : ffff43983efca640
>  x5 : 00000000410fd0d0 x4 : ffff4396c4272c40 x3 : ffffbca3f5d1e008
>  x2 : 0000000000000000 x1 : ffff4396c2421600 x0 : ffff4396cac96860
>  Call trace:
>   dev_pm_opp_set_config+0x49c/0x610
>   devm_pm_opp_set_config+0x18/0x70
>   vcodec_domains_get+0xb8/0x1638 [venus_core]
>   core_get_v4+0x1d8/0x218 [venus_core]
>   venus_probe+0xf4/0x468 [venus_core]
>   platform_probe+0x68/0xd8
>   really_probe+0xbc/0x2a8
>   __driver_probe_device+0x78/0xe0
>   driver_probe_device+0x3c/0xf0
>   __driver_attach+0x70/0x120
>   bus_for_each_dev+0x70/0xc0
>   driver_attach+0x24/0x30
>   bus_add_driver+0x150/0x200
>   driver_register+0x64/0x120
>   __platform_driver_register+0x28/0x38
>   qcom_venus_driver_init+0x24/0x1000 [venus_core]
>   do_one_initcall+0x54/0x1c8
>   do_init_module+0x44/0x1d0
>   load_module+0x16c8/0x1aa0
>   __do_sys_finit_module+0xbc/0x110
>   __arm64_sys_finit_module+0x20/0x30
>   invoke_syscall+0x44/0x108
>   el0_svc_common.constprop.0+0xcc/0xf0
>   do_el0_svc+0x2c/0xb8
>   el0_svc+0x2c/0x88
>   el0t_64_sync_handler+0xb8/0xc0
>   el0t_64_sync+0x18c/0x190
>   qcom-venus: probe of aa00000.video-codec failed with error -16
> 
> The fix is re-ordering the code related to OPP core. The OPP core
> expects all configuration options to be provided before the OPP
> table is added.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Changed this to Suggested-by.

> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
> ---
>  drivers/media/platform/qcom/venus/pm_helpers.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)

Applied. Thanks.

-- 
viresh