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authorMarek Szyprowski <m.szyprowski@samsung.com>2020-01-08 12:50:06 +0100
committerMark Brown <broonie@kernel.org>2020-01-09 13:24:06 +0000
commit1d7b051891722a36ee0b228bc940dd245f161ab1 (patch)
tree1023b9b0dc8b9d8509adc6ac1306f7156aa4d4ad /sound/soc/codecs/max98090.c
parentf0df2e650e3eee5ff79c06dedb98c318ff177a95 (diff)
downloadlinux-1d7b051891722a36ee0b228bc940dd245f161ab1.tar.bz2
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>
Diffstat (limited to 'sound/soc/codecs/max98090.c')
-rw-r--r--sound/soc/codecs/max98090.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index 4c7b16d557e2..c01ce4a3f86d 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -82,7 +82,7 @@ static int max98090_dapm_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;