[alsa-devel] [PATCH v2 12/15] ASoC: soc-core: add missing return value check for soc_link_init()

[Pierre-Louis Bossart]

> diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
> index 79a4753..bdae48e 100644
> --- a/sound/soc/soc-core.c
> +++ b/sound/soc/soc-core.c
> @@ -1983,8 +1983,11 @@ static int snd_soc_bind_card(struct snd_soc_card *card)
>   		goto probe_end;
>   	}
>   
> -	for_each_card_rtds(card, rtd)
> -		soc_link_init(card, rtd);
> +	for_each_card_rtds(card, rtd) {
> +		ret = soc_link_init(card, rtd);
> +		if (ret < 0)
> +			goto probe_end;
> +	}

Morimoto-san, this patch proves very useful to avoid a kernel oops when 
a dailink init fails, but I still see a warning when cleaning-up.

I was experimenting with a topology file that wasn't complete and came 
across the warning below, would you have any ideas/recommendations on 
what might be missing? I am running out of time this week so thought I 
would ask, in case this rings a bell.

Thanks!

[   21.098662] bytcr_rt5640 bytcr_rt5640: ASoC: no source widget found 
for modem_out
[   21.098677] bytcr_rt5640 bytcr_rt5640: ASoC: Failed to add route 
modem_out -> direct -> ssp0 Tx
[   21.098694] bytcr_rt5640 bytcr_rt5640: ASoC: no sink widget found for 
modem_in
[   21.098703] bytcr_rt5640 bytcr_rt5640: ASoC: Failed to add route ssp0 
Rx -> direct -> modem_in
[   21.098732] bytcr_rt5640 bytcr_rt5640: ASoC: failed to init 
SSP2-Codec: -19

<<< this is the dailink init failure due to missing routes

[   21.098790] ------------[ cut here ]------------
[   21.098807] WARNING: CPU: 3 PID: 1028 at kernel/workqueue.c:3031 
__flush_work+0x1a3/0x1c0
[   21.098809] Modules linked in: snd_soc_sst_bytcr_rt5640(+) 
snd_sof_acpi snd_sof_intel_byt snd_soc_acpi_intel_match 
snd_sof_intel_bdw snd_sof_intel_ipc snd_sof snd_sof_xtensa_dsp 
snd_soc_acpi ax88179_178a usbnet intel_soc_dts_thermal intel_powerclamp 
hid_multitouch mei_txe mei wmi snd_soc_rt5640 snd_soc_rl6231 
int3406_thermal snd_soc_core processor_thermal_device int3403_thermal 
intel_soc_dts_iosf int3400_thermal snd_pcm int340x_thermal_zone 
acpi_thermal_rel snd_timer snd soundcore efivarfs mmc_block i915 
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt 
fb_sys_fops xhci_pci drm xhci_hcd i2c_hid sdhci_acpi sdhci
[   21.098877] CPU: 3 PID: 1028 Comm: systemd-udevd Not tainted 
5.4.0-rc8-test+ #15
[   21.098880] Hardware name: ASUSTeK COMPUTER INC. T100TAF/T100TAF, 
BIOS T100TAF.207 09/10/2014
[   21.098889] RIP: 0010:__flush_work+0x1a3/0x1c0
[   21.098896] Code: ff ff 41 c6 04 24 00 fb 45 31 f6 eb 8e 8b 0b 48 8b 
53 08 83 e1 08 48 0f ba 2b 03 80 c9 f0 e9 5d ff ff ff 0f 0b e9 71 ff ff 
ff <0f> 0b 45 31 f6 e9 67 ff ff ff e8 de 2f fe ff 66 66 2e 0f 1f 84 00
[   21.098901] RSP: 0018:ffff9e05804cf910 EFLAGS: 00010246
[   21.098906] RAX: 0000000000000000 RBX: ffff8add3859c640 RCX: 
ffffffffc0748248
[   21.098910] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 
ffff8add3859c640
[   21.098913] RBP: 0000000000000000 R08: 0000000000000000 R09: 
ffff8add3679ae00
[   21.098917] R10: ffff8add35ff5840 R11: ffff9e05804cf7bd R12: 
ffff8add37558ed8
[   21.098921] R13: ffff8add37558e28 R14: 0000000000000001 R15: 
ffff8add36d36610
[   21.098926] FS:  00007f3ce09c7d40(0000) GS:ffff8add39580000(0000) 
knlGS:0000000000000000
[   21.098930] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.098934] CR2: 0000561745975f10 CR3: 0000000076f26000 CR4: 
00000000001006e0
[   21.098937] Call Trace:
[   21.098951]  ? try_to_del_timer_sync+0x4a/0x80
[   21.098973]  soc_free_pcm_runtime.part.0+0x38/0x50 [snd_soc_core]
[   21.098994]  snd_soc_tplg_component_remove+0x2f5/0x4f0 [snd_soc_core]
[   21.099015]  soc_remove_component+0x76/0x80 [snd_soc_core]
[   21.099033]  soc_cleanup_card_resources+0x100/0x2b0 [snd_soc_core]
[   21.099051]  snd_soc_bind_card+0x1f5/0xa00 [snd_soc_core]
[   21.099073]  devm_snd_soc_register_card+0x3e/0x80 [snd_soc_core]
[   21.099094]  snd_byt_rt5640_mc_probe.cold+0x4d3/0x55a 
[snd_soc_sst_bytcr_rt5640]
[   21.099110]  platform_drv_probe+0x30/0x80
[   21.099120]  really_probe+0x293/0x3c0
[   21.099130]  driver_probe_device+0xb1/0x100
[   21.099139]  device_driver_attach+0x4e/0x60
[   21.099148]  __driver_attach+0x85/0x140
[   21.099157]  ? device_driver_attach+0x60/0x60
[   21.099164]  bus_for_each_dev+0x73/0xb0
[   21.099174]  bus_add_driver+0x148/0x1e0
[   21.099183]  driver_register+0x67/0xb0
[   21.099191]  ? 0xffffffffc042b000
[   21.099199]  do_one_initcall+0x41/0x1df
[   21.099207]  ? __schedule+0x28c/0x5a0
[   21.099217]  ? free_vmap_area_noflush+0x8d/0xe0
[   21.099223]  ? _cond_resched+0x10/0x20
[   21.099232]  ? kmem_cache_alloc_trace+0x3a/0x1b0
[   21.099243]  do_init_module+0x56/0x200
[   21.099252]  load_module+0x243a/0x2730
[   21.099268]  ? __do_sys_finit_module+0xaa/0x110
[   21.099276]  __do_sys_finit_module+0xaa/0x110
[   21.099287]  do_syscall_64+0x43/0x110
[   21.099297]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   21.099304] RIP: 0033:0x7f3ce11b1f59
[   21.099312] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 07 6f 0c 00 f7 d8 64 89 01 48
[   21.099316] RSP: 002b:00007ffde804cc38 EFLAGS: 00000246 ORIG_RAX: 
0000000000000139
[   21.099324] RAX: ffffffffffffffda RBX: 000055a55f902bf0 RCX: 
00007f3ce11b1f59
[   21.099328] RDX: 0000000000000000 RSI: 00007f3ce10b6cad RDI: 
0000000000000006
[   21.099332] RBP: 00007f3ce10b6cad R08: 0000000000000000 R09: 
0000000000000000
[   21.099336] R10: 0000000000000006 R11: 0000000000000246 R12: 
0000000000000000
[   21.099341] R13: 000055a55f8f0940 R14: 0000000000020000 R15: 
000055a55f902bf0
[   21.099348] ---[ end trace c7c2a98f406474f6 ]---
[   21.099452] ------------[ cut here ]------------