diff options
| author | Pierre-Louis Bossart <[email protected]> | 2022-07-15 09:41:41 -0500 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2022-07-15 17:10:54 +0100 |
| commit | 8116483407076b81af0efb14f6d69aefaecbf3d8 (patch) | |
| tree | a99369df9998e164457b05c450b860038120f5e5 | |
| parent | e1d1ffeda697dedf0859f963bc4180b5bb7bf150 (diff) | |
ASoC: Intel: sof_sdw: avoid oops in error handling
While tinkering with ACPI work-arounds for the HP Omen 16 support, we
identified a corner case where the headset codec device properties are
not set in the codec .init when -EPROBE_DEFER is returned, but
released unconditionally in the .exit().
This leads to a kernel oops
[ 4.186891] sof_sdw sof_sdw: snd_soc_register_card failed -517
[ 4.186896] BUG: kernel NULL pointer dereference, address: 00000000000003f0
[ 4.186914] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 4.186926] RIP: 0010:dev_fwnode+0x5/0x20
[ 4.186974] device_remove_software_node+0x10/0x80
[ 4.186982] sof_sdw_rt711_exit+0x19/0x30 [snd_soc_sof_sdw]
[ 4.186990] mc_dailink_exit_loop+0x94/0xc0 [snd_soc_sof_sdw]
[ 4.186996] ? rt711_rtd_init+0x170/0x170 [snd_soc_sof_sdw]
A similar error case can occur if the addition of the device property
fails. We need to test if the property was successfully added before
removing it.
BugLink: https://github.com/thesofproject/linux/issues/3727
Fixes: 768ad6d80db2d ("ASoC: Intel: sof_sdw: handle errors on card registration")
Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Ranjani Sridharan <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
| -rw-r--r-- | sound/soc/intel/boards/sof_sdw_rt711.c | 3 | ||||
| -rw-r--r-- | sound/soc/intel/boards/sof_sdw_rt711_sdca.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/sof_sdw_rt711.c b/sound/soc/intel/boards/sof_sdw_rt711.c index 49ff0871e9e7..8291967f23f3 100644 --- a/sound/soc/intel/boards/sof_sdw_rt711.c +++ b/sound/soc/intel/boards/sof_sdw_rt711.c @@ -139,6 +139,9 @@ int sof_sdw_rt711_exit(struct snd_soc_card *card, struct snd_soc_dai_link *dai_l { struct mc_private *ctx = snd_soc_card_get_drvdata(card); + if (!ctx->headset_codec_dev) + return 0; + device_remove_software_node(ctx->headset_codec_dev); put_device(ctx->headset_codec_dev); diff --git a/sound/soc/intel/boards/sof_sdw_rt711_sdca.c b/sound/soc/intel/boards/sof_sdw_rt711_sdca.c index b3fc32bacfa8..7f16304d025b 100644 --- a/sound/soc/intel/boards/sof_sdw_rt711_sdca.c +++ b/sound/soc/intel/boards/sof_sdw_rt711_sdca.c @@ -140,6 +140,9 @@ int sof_sdw_rt711_sdca_exit(struct snd_soc_card *card, struct snd_soc_dai_link * { struct mc_private *ctx = snd_soc_card_get_drvdata(card); + if (!ctx->headset_codec_dev) + return 0; + device_remove_software_node(ctx->headset_codec_dev); put_device(ctx->headset_codec_dev); |