[PATCH 7/8] ASoC: q6asm-dai: check available buffer size before sending

[Srinivas Kandagatla]

This patch add simple check before sending data buffer to dsp which will
ensure that we are not sending any buffers which are not already available.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
---
 sound/soc/qcom/qdsp6/q6asm-dai.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
index 892411f81613..7aba3c07810b 100644
--- a/sound/soc/qcom/qdsp6/q6asm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
@@ -534,13 +534,12 @@ static void compress_event_handler(uint32_t opcode, uint32_t token,
 		prtd->copied_total += bytes_written;
 		snd_compr_fragment_elapsed(substream);
 
-		if (prtd->state != Q6ASM_STREAM_RUNNING) {
+		avail = prtd->bytes_received - prtd->bytes_sent;
+		if (prtd->state != Q6ASM_STREAM_RUNNING || avail <= 0) {
 			spin_unlock_irqrestore(&prtd->lock, flags);
 			break;
 		}
 
-		avail = prtd->bytes_received - prtd->bytes_sent;
-
 		if (avail >= prtd->pcm_count) {
 			q6asm_write_async(prtd->audio_client, prtd->stream_id,
 					   prtd->pcm_count, 0, 0, 0);
-- 
2.21.0