--- Begin Message ---
- To: Mark Brown <broonie@xxxxxxxxxx>, Jaroslav Kysela <perex@xxxxxxxx>, Takashi Iwai <tiwai@xxxxxxxx>
- Subject: [PATCH v1 1/4] ALSA: hda: cs35l41: Clean up Firmware Load Controls
- From: Stefan Binding <sbinding@xxxxxxxxxxxxxxxxxxxxx>
- Date: Fri, 14 Apr 2023 16:25:49 +0100
- Cc: alsa-devel@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, patches@xxxxxxxxxxxxxxxxxxxxx, Stefan Binding <sbinding@xxxxxxxxxxxxxxxxxxxxx>
- In-reply-to: <20230414152552.574502-1-sbinding@opensource.cirrus.com>
- References: <20230414152552.574502-1-sbinding@opensource.cirrus.com>
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@xxxxxxxxxxxxxxxxxxxxx> --- sound/pci/hda/cs35l41_hda.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c index b5210abb5141f..d100189e15b83 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; -- 2.34.1
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