diff options
| author | Stefan Binding <sbinding@opensource.cirrus.com> | 2023-06-06 12:34:34 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-06-06 14:32:04 +0200 |
| commit | 448425f05b16f124290ad82b836c04da63b63035 (patch) | |
| tree | 646f07e29470e31c2c4db0c114c69065fa7a7f72 | |
| parent | Merge branch 'topic/midi20' into for-next (diff) | |
| download | linux-448425f05b16f124290ad82b836c04da63b63035.tar.xz linux-448425f05b16f124290ad82b836c04da63b63035.zip | |
ALSA: hda: cs35l41: Clean up Firmware Load Controls
Ensure Firmware Load control and Firmware Type control
returns 1 when the value changes.
Remove fw_mutex from firmware load control put, since it is
unnecessary, and prevents any possibility of mutex inversion.
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230606103436.455348-2-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/cs35l41_hda.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index b5210abb5141..d100189e15b8 100644 --- a/sound/pci/hda/cs35l41_hda.c +++ b/sound/pci/hda/cs35l41_hda.c @@ -835,34 +835,26 @@ static int cs35l41_fw_load_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct cs35l41_hda *cs35l41 = snd_kcontrol_chip(kcontrol); - unsigned int ret = 0; - - mutex_lock(&cs35l41->fw_mutex); if (cs35l41->request_fw_load == ucontrol->value.integer.value[0]) - goto err; + return 0; if (cs35l41->fw_request_ongoing) { dev_dbg(cs35l41->dev, "Existing request not complete\n"); - ret = -EBUSY; - goto err; + return -EBUSY; } /* Check if playback is ongoing when initial request is made */ if (cs35l41->playback_started) { dev_err(cs35l41->dev, "Cannot Load/Unload firmware during Playback\n"); - ret = -EBUSY; - goto err; + return -EBUSY; } cs35l41->fw_request_ongoing = true; cs35l41->request_fw_load = ucontrol->value.integer.value[0]; schedule_work(&cs35l41->fw_load_work); -err: - mutex_unlock(&cs35l41->fw_mutex); - - return ret; + return 1; } static int cs35l41_fw_type_ctl_get(struct snd_kcontrol *kcontrol, @@ -881,8 +873,12 @@ static int cs35l41_fw_type_ctl_put(struct snd_kcontrol *kcontrol, struct cs35l41_hda *cs35l41 = snd_kcontrol_chip(kcontrol); if (ucontrol->value.enumerated.item[0] < HDA_CS_DSP_NUM_FW) { - cs35l41->firmware_type = ucontrol->value.enumerated.item[0]; - return 0; + if (cs35l41->firmware_type != ucontrol->value.enumerated.item[0]) { + cs35l41->firmware_type = ucontrol->value.enumerated.item[0]; + return 1; + } else { + return 0; + } } return -EINVAL; |