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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 20:53:53 +08:00
linux-next/sound
Tzung-Bi Shih 70fc53734e
ASoC: core: move DAI pre-links initiation to snd_soc_instantiate_card
Kernel crashes when an ASoC component rebinding.

The dai_link->platforms has been reset to NULL by soc_cleanup_platform()
in soc_cleanup_card_resources() when un-registering component.  However,
it has no chance to re-allocate the dai_link->platforms when registering
the component again.

Move the DAI pre-links initiation from snd_soc_register_card() to
snd_soc_instantiate_card() to make sure all DAI pre-links get initiated
when component rebinding.

As an example, by using the following commands:
- echo -n max98357a > /sys/bus/platform/drivers/max98357a/unbind
- echo -n max98357a > /sys/bus/platform/drivers/max98357a/bind

Got the error message:
"Unable to handle kernel NULL pointer dereference at virtual address".

The call trace:
snd_soc_is_matching_component+0x30/0x6c
soc_bind_dai_link+0x16c/0x240
snd_soc_bind_card+0x1e4/0xb10
snd_soc_add_component+0x270/0x300
snd_soc_register_component+0x54/0x6c

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-06 17:24:49 +01:00
..
ac97 ALSA: ac97: Fix of-node refcount unbalance 2019-02-19 22:20:14 +01:00
aoa ALSA: aoa: Fix of-node refcount unbalance 2019-02-19 22:20:45 +01:00
arm ALSA: arm: Avoid passing NULL to memory allocators 2019-02-04 16:51:46 +01:00
atmel ALSA: atmel: Drop superfluous PCM preallocation error checks 2019-02-06 10:28:39 +01:00
core ALSA: pcm: Don't suspend stream in unrecoverable PCM state 2019-03-25 16:36:30 +01:00
drivers ALSA: opl3: fix mismatch between snd_opl3_drum_switch definition and declaration 2019-03-18 13:50:46 +01:00
firewire ALSA: firewire-motu: use 'version' field of unit directory to identify model 2019-03-17 08:07:21 +01:00
hda sound fixes for 5.1-rc1 2019-03-15 14:05:00 -07:00
i2c ALSA: i2c: Clean up with new procfs helpers 2019-02-06 18:11:56 +01:00
isa ALSA: sb8: add a check for request_region 2019-03-16 10:30:27 +01:00
mips ALSA: mips: pass struct device to DMA API functions 2019-02-01 17:15:44 +01:00
oss treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
parisc ALSA: parisc: Drop superfluous PCM preallocation error checks 2019-02-06 10:29:03 +01:00
pci ASoC: hda: fix unbalanced codec dev refcount for HDA_DEV_ASOC 2019-06-03 17:43:23 +01:00
pcmcia ALSA: pcmcia: Clean up with new procfs helpers 2019-02-06 18:11:57 +01:00
ppc ALSA: ppc: Fix of-node refcount unbalance 2019-02-19 22:20:46 +01:00
sh ALSA: sh: Drop superfluous PCM preallocation error checks 2019-02-06 10:29:24 +01:00
soc ASoC: core: move DAI pre-links initiation to snd_soc_instantiate_card 2019-06-06 17:24:49 +01:00
sparc ASoC: Updates for v5.1 2019-02-08 14:20:32 +01:00
spi ALSA: spi: Drop superfluous PCM preallocation error checks 2019-02-06 10:29:36 +01:00
synth ALSA: emux: Remove superfluous snd_info_register() calls 2019-02-06 18:11:53 +01:00
usb ALSA: usx2y: Fix potential NULL pointer dereference 2019-03-13 11:27:06 +01:00
x86 ALSA: x86: Avoid passing NULL to memory allocators 2019-02-04 16:51:34 +01:00
xen ALSA: xen-front: Use Xen common shared buffer implementation 2018-12-18 12:19:37 -05:00
ac97_bus.c
Kconfig ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver 2018-05-16 12:58:36 +02:00
last.c
Makefile ALSA: xen-front: Introduce Xen para-virtualized sound frontend driver 2018-05-16 12:58:36 +02:00
sound_core.c sound: Use octal not symbolic permissions 2018-05-28 11:27:20 +02:00