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asoc: msm_common: add mutex lock for vote against sleep cnt

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add mutex for vote_against_sleep_cnt to avoid race conditions
while updating the cnt value at the time of SSR. Add check
while decrementing the cnt.

Change-Id: Ic8e40fa6b4a68c05fb70369ecb764943d5f582fa
Signed-off-by: Prasad Kumpatla <quic_pkumpatl@quicinc.com>
This commit is contained in:
Prasad Kumpatla
2023-06-09 15:07:38 +05:30
committed by Gerrit - the friendly Code Review server
parent 44f00dc545
commit 8ae3047a7e
1 changed files with 15 additions and 2 deletions
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17
asoc/msm_common.c
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@@ -48,6 +48,8 @@ struct snd_card_pdata {
#define SAMPLING_RATE_176P4KHZ 176400
#define SAMPLING_RATE_352P8KHZ 352800
struct mutex vote_against_sleep_lock;
static struct attribute device_state_attr = {
.name = "state",
.mode = 0660,
@@ -173,8 +175,13 @@ int snd_card_notify_user(snd_card_status_t card_status)
{
snd_card_pdata->card_status = card_status;
sysfs_notify(&snd_card_pdata->snd_card_kobj, NULL, "card_state");
if (card_status == 0)
if (card_status == 0) {
mutex_lock(&vote_against_sleep_lock);
vote_against_sleep_cnt = 0;
pr_debug("%s: SSR/PDR triggered reset vote_against_sleep_cnt = %d\n",
__func__, vote_against_sleep_cnt);
mutex_unlock(&vote_against_sleep_lock);
}
return 0;
}
@@ -809,6 +816,8 @@ exit:
devm_kfree(&pdev->dev, core_val_array);
}
mutex_init(&vote_against_sleep_lock);
return 0;
};
@@ -819,6 +828,7 @@ void msm_common_snd_deinit(struct msm_common_pdata *common_pdata)
if (!common_pdata)
return;
mutex_destroy(&vote_against_sleep_lock);
msm_audio_remove_qos_request();
mutex_destroy(&common_pdata->aud_dev_lock);
@@ -1098,6 +1108,7 @@ static int msm_vote_against_sleep_ctl_put(struct snd_kcontrol *kcontrol,
{
int ret = 0;
mutex_lock(&vote_against_sleep_lock);
vote_against_sleep_enable = ucontrol->value.integer.value[0];
pr_debug("%s: vote against sleep enable: %d sleep cnt: %d", __func__,
vote_against_sleep_enable, vote_against_sleep_cnt);
@@ -1107,7 +1118,8 @@ static int msm_vote_against_sleep_ctl_put(struct snd_kcontrol *kcontrol,
if (vote_against_sleep_cnt == 1) {
ret = audio_prm_set_vote_against_sleep(1);
if (ret < 0) {
--vote_against_sleep_cnt;
if (vote_against_sleep_cnt > 0)
--vote_against_sleep_cnt;
pr_err("%s: failed to vote against sleep ret: %d\n", __func__, ret);
}
}
@@ -1119,6 +1131,7 @@ static int msm_vote_against_sleep_ctl_put(struct snd_kcontrol *kcontrol,
}
pr_debug("%s: vote against sleep vote ret: %d\n", __func__, ret);
mutex_unlock(&vote_against_sleep_lock);
return ret;
}