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-rw-r--r--sound/core/pcm_lib.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index e23e0e7ab26f..a1707cca9c66 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -334,11 +334,15 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
/* delta = "expected next hw_ptr" for in_interrupt != 0 */
delta = runtime->hw_ptr_interrupt + runtime->period_size;
if (delta > new_hw_ptr) {
- hw_base += runtime->buffer_size;
- if (hw_base >= runtime->boundary)
- hw_base = 0;
- new_hw_ptr = hw_base + pos;
- goto __delta;
+ /* check for double acknowledged interrupts */
+ hdelta = jiffies - runtime->hw_ptr_jiffies;
+ if (hdelta > runtime->hw_ptr_buffer_jiffies/2) {
+ hw_base += runtime->buffer_size;
+ if (hw_base >= runtime->boundary)
+ hw_base = 0;
+ new_hw_ptr = hw_base + pos;
+ goto __delta;
+ }
}
}
/* new_hw_ptr might be lower than old_hw_ptr in case when */