diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/sof/trace.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c index d588e4b70fad..a2d89d295f0f 100644 --- a/sound/soc/sof/trace.c +++ b/sound/soc/sof/trace.c @@ -13,10 +13,9 @@ #include "sof-priv.h" #include "ops.h" -static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev, - loff_t pos, size_t buffer_size) +static size_t sof_trace_avail(struct snd_sof_dev *sdev, + loff_t pos, size_t buffer_size) { - wait_queue_entry_t wait; loff_t host_offset = READ_ONCE(sdev->host_offset); /* @@ -31,6 +30,19 @@ static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev, if (host_offset > pos) return host_offset - pos; + return 0; +} + +static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev, + loff_t pos, size_t buffer_size) +{ + wait_queue_entry_t wait; + size_t ret = sof_trace_avail(sdev, pos, buffer_size); + + /* data immediately available */ + if (ret) + return ret; + /* wait for available trace data from FW */ init_waitqueue_entry(&wait, current); set_current_state(TASK_INTERRUPTIBLE); @@ -42,12 +54,7 @@ static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev, } remove_wait_queue(&sdev->trace_sleep, &wait); - /* return bytes available for copy */ - host_offset = READ_ONCE(sdev->host_offset); - if (host_offset < pos) - return buffer_size - pos; - - return host_offset - pos; + return sof_trace_avail(sdev, pos, buffer_size); } static ssize_t sof_dfsentry_trace_read(struct file *file, char __user *buffer, |