[PATCH v2] ALSA: aoa: Skip devices with no codecs in i2sbus_resume()
STALE207d
From: Thorsten Blum <hidden>
Date: 2026-03-10 10:30:06
Also in:
linux-sound, lkml, stable
Subsystem:
aoa (apple onboard audio) alsa driver, sound, the rest · Maintainers:
Johannes Berg, Jaroslav Kysela, Takashi Iwai, Linus Torvalds
In i2sbus_resume(), skip devices with an empty codec list, which avoids
using an uninitialized 'sysclock_factor' in the 32-bit format path in
i2sbus_pcm_prepare().
In i2sbus_pcm_prepare(), replace two list_for_each_entry() loops with a
single list_first_entry() now that the codec list is guaranteed to be
non-empty by all callers.
Fixes: f3d9478b2ce4 ("[ALSA] snd-aoa: add snd-aoa")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <redacted>
---
Changes in v2:
- Skip devices with no codecs in i2sbus_resume() and use
list_first_entry() in i2sbus_pcm_prepare() now that the codec list is
guaranteed to be non-empty by all callers (Takashi)
- Link to v1: https://lore.kernel.org/lkml/20260309114159.765304-3-thorsten.blum@linux.dev/ (local)
---
sound/aoa/soundbus/i2sbus/core.c | 3 +++
sound/aoa/soundbus/i2sbus/pcm.c | 16 +++++-----------
2 files changed, 8 insertions(+), 11 deletions(-)
diff --git a/sound/aoa/soundbus/i2sbus/core.c b/sound/aoa/soundbus/i2sbus/core.c
index f974b96e98cd..22c956267f4e 100644
--- a/sound/aoa/soundbus/i2sbus/core.c
+++ b/sound/aoa/soundbus/i2sbus/core.c@@ -405,6 +405,9 @@ static int i2sbus_resume(struct macio_dev* dev) int err, ret = 0; list_for_each_entry(i2sdev, &control->list, item) { + if (list_empty(&i2sdev->sound.codec_list)) + continue; + /* reset i2s bus format etc. */ i2sbus_pcm_prepare_both(i2sdev);
diff --git a/sound/aoa/soundbus/i2sbus/pcm.c b/sound/aoa/soundbus/i2sbus/pcm.c
index aff99003d833..97c807e67d56 100644
--- a/sound/aoa/soundbus/i2sbus/pcm.c
+++ b/sound/aoa/soundbus/i2sbus/pcm.c@@ -383,6 +383,9 @@ static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) /* set stop command */ command->command = cpu_to_le16(DBDMA_STOP); + cii = list_first_entry(&i2sdev->sound.codec_list, + struct codec_info_item, list); + /* ok, let's set the serial format and stuff */ switch (runtime->format) { /* 16 bit formats */
@@ -390,13 +393,7 @@ static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) case SNDRV_PCM_FORMAT_U16_BE: /* FIXME: if we add different bus factors we need to * do more here!! */ - bi.bus_factor = 0; - list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { - bi.bus_factor = cii->codec->bus_factor; - break; - } - if (!bi.bus_factor) - return -ENODEV; + bi.bus_factor = cii->codec->bus_factor; input_16bit = 1; break; case SNDRV_PCM_FORMAT_S32_BE:
@@ -410,10 +407,7 @@ static int i2sbus_pcm_prepare(struct i2sbus_dev *i2sdev, int in) return -EINVAL; } /* we assume all sysclocks are the same! */ - list_for_each_entry(cii, &i2sdev->sound.codec_list, list) { - bi.sysclock_factor = cii->codec->sysclock_factor; - break; - } + bi.sysclock_factor = cii->codec->sysclock_factor; if (clock_and_divisors(bi.sysclock_factor, bi.bus_factor,