ASoC: core: fix devres parameter in devm_snd_soc_register_card()
Since devm_card_release() expects parameter 'res' to be a pointer to
struct snd_soc_card, devm_snd_soc_register_card() should really pass
such a pointer rather than the one to struct device.
This bug causes the kernel Oops below with imx-sgtl500 driver when we
remove the module. It happens because with 'card' pointing to the wrong
structure, card->num_rtd becomes 0 in function soc_remove_dai_links().
Consequently, soc_remove_link_components() and in turn
soc_cleanup_codec[platform]_debugfs() will not be called on card
removal. It results in that debugfs_card_root is being removed while
its child entries debugfs_codec_root and debugfs_platform_root are still
there, and thus the kernel Oops.
Fix the bug by correcting the parameter 'res' to be the pointer to
struct snd_soc_card.
$ lsmod
Module Size Used by
snd_soc_imx_sgtl5000 3506 0
snd_soc_sgtl5000 13677 2
snd_soc_imx_audmux 5324 1 snd_soc_imx_sgtl5000
snd_soc_fsl_ssi 8139 2
imx_pcm_dma 1380 1 snd_soc_fsl_ssi
$ rmmod snd_soc_imx_sgtl5000
Unable to handle kernel paging request at virtual address
e594025c
pgd =
be134000
[
e594025c] *pgd=
00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in: snd_soc_imx_sgtl5000(-) snd_soc_sgtl5000 snd_soc_imx_audmux snd_soc_fsl_ssi imx_pcm_dma
CPU: 0 PID: 1793 Comm: rmmod Not tainted 3.13.0-rc1 #1570
task:
bee28900 ti:
bfbec000 task.ti:
bfbec000
PC is at debugfs_remove_recursive+0x28/0x154
LR is at snd_soc_unregister_card+0xa0/0xcc
pc : [<
80252b38>] lr : [<
80496ac4>] psr:
a0000013
sp :
bfbede00 ip :
bfbede28 fp :
bfbede24
r10:
803281d4 r9 :
bfbec000 r8 :
803271ac
r7 :
bef54440 r6 :
00000004 r5 :
bf9a4010 r4 :
bf9a4010
r3 :
e5940224 r2 :
00000000 r1 :
bef54450 r0 :
803271ac
Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control:
10c53c7d Table:
4e13404a DAC:
00000015
Process rmmod (pid: 1793, stack limit = 0xbfbec240)
Stack: (0xbfbede00 to 0xbfbee000)
de00:
00000000 bf9a4010 bf9a4010 00000004 bef54440 bec89000 bfbede44 bfbede28
de20:
80496ac4 80252b1c 804a4b60 bfbede60 bf9a4010 00000004 bfbede54 bfbede48
de40:
804a4b74 80496a30 bfbede94 bfbede58 80328728 804a4b6c bfbede94 a0000013
de60:
bf1b5800 bef54440 00000002 bf9a4010 7f0169f8 bf9a4044 00000081 8000e9c4
de80:
bfbec000 00000000 bfbedeac bfbede98 80328cb0 80328618 7f016000 bf9a4010
dea0:
bfbedec4 bfbedeb0 8032561c 80328c84 bf9a4010 7f0169f8 bfbedee4 bfbedec8
dec0:
80325e84 803255a8 bee28900 7f0169f8 00000000 78208d30 bfbedefc bfbedee8
dee0:
80325410 80325dd4 beca8100 7f0169f8 bfbedf14 bfbedf00 803264f8 803253c8
df00:
7f01635c 7f016a3c bfbedf24 bfbedf18 80327098 803264d4 bfbedf34 bfbedf28
df20:
7f016370 80327090 bfbedfa4 bfbedf38 80085ef0 7f016368 bfbedf54 5f646e73
df40:
5f636f73 5f786d69 6c746773 30303035 00000000 78208008 bfbedf84 bfbedf68
df60:
800613b0 80061194 fffffffe 78208d00 7efc2f07 00000081 7f016a3c 00000800
df80:
bfbedf84 00000000 00000000 fffffffe 78208d00 7efc2f07 00000000 bfbedfa8
dfa0:
8000e800 80085dcc fffffffe 78208d00 78208d30 00000800 a8c82400 a8c82400
dfc0:
fffffffe 78208d00 7efc2f07 00000081 00000002 00000000 78208008 00000800
dfe0:
7efc2e1c 7efc2ba8 76f5ca47 76edec7c 80000010 78208d30 00000000 00000000
Backtrace:
[<
80252b10>] (debugfs_remove_recursive+0x0/0x154) from [<
80496ac4>] (snd_soc_unregister_card+0xa0/0xcc)
r8:
bec89000 r7:
bef54440 r6:
00000004 r5:
bf9a4010 r4:
bf9a4010
r3:
00000000
[<
80496a24>] (snd_soc_unregister_card+0x0/0xcc) from [<
804a4b74>] (devm_card_release+0x14/0x18)
r6:
00000004 r5:
bf9a4010 r4:
bfbede60 r3:
804a4b60
[<
804a4b60>] (devm_card_release+0x0/0x18) from [<
80328728>] (release_nodes+0x11c/0x1dc)
[<
8032860c>] (release_nodes+0x0/0x1dc) from [<
80328cb0>] (devres_release_all+0x38/0x54)
[<
80328c78>] (devres_release_all+0x0/0x54) from [<
8032561c>] (__device_release_driver+0x80/0xd4)
r4:
bf9a4010 r3:
7f016000
[<
8032559c>] (__device_release_driver+0x0/0xd4) from [<
80325e84>] (driver_detach+0xbc/0xc0)
r5:
7f0169f8 r4:
bf9a4010
[<
80325dc8>] (driver_detach+0x0/0xc0) from [<
80325410>] (bus_remove_driver+0x54/0x98)
r6:
78208d30 r5:
00000000 r4:
7f0169f8 r3:
bee28900
[<
803253bc>] (bus_remove_driver+0x0/0x98) from [<
803264f8>] (driver_unregister+0x30/0x50)
r4:
7f0169f8 r3:
beca8100
[<
803264c8>] (driver_unregister+0x0/0x50) from [<
80327098>] (platform_driver_unregister+0x14/0x18)
r4:
7f016a3c r3:
7f01635c
[<
80327084>] (platform_driver_unregister+0x0/0x18) from [<
7f016370>] (imx_sgtl5000_driver_exit+0x14/0x1c [snd_soc_imx_sgtl5000])
[<
7f01635c>] (imx_sgtl5000_driver_exit+0x0/0x1c [snd_soc_imx_sgtl5000]) from [<
80085ef0>] (SyS_delete_module+0x130/0x18c)
[<
80085dc0>] (SyS_delete_module+0x0/0x18c) from [<
8000e800>] (ret_fast_syscall+0x0/0x48)
r6:
7efc2f07 r5:
78208d00 r4:
fffffffe
Code:
889da9f8 e5983020 e3530000 089da9f8 (
e5933038)
---[ end trace
825e7e125251a225 ]---
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>