diff options
| author |   Marek Szyprowski <m.szyprowski@samsung.com> | 2020-01-08 12:50:06 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2020-01-09 13:25:00 +0000 |
| commit | 4e93c1294f4b051d574d6bc59755d2863286990e (patch) | |
| tree | 2666844e2f51ad8ae7f9a1d7cb361bdf8aabcc4f | |
| parent | ASoC: max98090: fix incorrect helper in max98090_dapm_put_enum_double() (diff) | |
| download | linux-dev-4e93c1294f4b051d574d6bc59755d2863286990e.tar.xz linux-dev-4e93c1294f4b051d574d6bc59755d2863286990e.zip | |
ASoC: max98090: fix incorrect helper in max98090_dapm_put_enum_double()
Commit 62d5ae4cafb7 ("ASoC: max98090: save and restore SHDN when changing
sensitive registers") extended the code for handling "LTENL Mux", "LTENR
Mux", "LBENL Mux" and "LBENR Mux" controls by adding a custom
max98090_dapm_put_enum_double() function to them. However that function
used incorrect helper to get its component object. Fix this by using the
proper snd_soc_dapm_* helper.
This fixes the following NULL pointer exception observed on
Exynos4412-based Odroid U3 board:
8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 000000b0
pgd = (ptrval)
[000000b0] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 1104 Comm: alsactl Not tainted 5.5.0-rc5-next-20200107 #166
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
PC is at __mutex_lock+0x54/0xb18
LR is at ___might_sleep+0x3c/0x2e0
...
Process alsactl (pid: 1104, stack limit = 0x(ptrval))
...
[<c0b49630>] (__mutex_lock) from [<c0b4a110>] (mutex_lock_nested+0x1c/0x24)
[<c0b4a110>] (mutex_lock_nested) from [<c0839b3c>] (max98090_shdn_save+0x1c/0x28)
[<c0839b3c>] (max98090_shdn_save) from [<c083a4f8>] (max98090_dapm_put_enum_double+0x20/0x40)
[<c083a4f8>] (max98090_dapm_put_enum_double) from [<c080d0e8>] (snd_ctl_ioctl+0x190/0xbb8)
[<c080d0e8>] (snd_ctl_ioctl) from [<c02cafec>] (ksys_ioctl+0x470/0xaf8)
[<c02cafec>] (ksys_ioctl) from [<c0101000>] (ret_fast_syscall+0x0/0x28)
...
---[ end trace 0e93f0580f4b9241 ]---
Fixes: 62d5ae4cafb7 ("ASoC: max98090: save and restore SHDN when changing sensitive registers")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200108115007.31095-1-m.szyprowski@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/codecs/max98090.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c index c01ce4a3f86d..ede03663cbed 100644 --- a/sound/soc/codecs/max98090.c +++ b/sound/soc/codecs/max98090.c @@ -98,7 +98,7 @@ static int max98090_put_enum_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *component = - snd_soc_kcontrol_component(kcontrol); + snd_soc_dapm_kcontrol_component(kcontrol); struct max98090_priv *max98090 = snd_soc_component_get_drvdata(component); int ret; |