X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;ds=sidebyside;f=sound%2Fcore%2Fpcm_lib.c;h=a1707cca9c6635c8b4cd7e79b5cebe21bffc2d9e;hb=caf8394524fdc039b090cd3af99157e9e76f4f06;hp=e23e0e7ab26f9ff5f02204ca62422a14cc674e5e;hpb=6b5b817f103450444f3f658a498f435d92a197e5;p=karo-tx-linux.git

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 */