Merge branch 'for-4.12/asus' into for-linus

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c
index 1d5acbe0c08b..448efd4e980e 100644
--- a/sound/core/seq/seq_fifo.c
+++ b/sound/core/seq/seq_fifo.c
@@ -21,6 +21,8 @@
 
 #include <sound/core.h>
 #include <linux/slab.h>
+#include <linux/sched/signal.h>
+
 #include "seq_fifo.h"
 #include "seq_lock.h"
 
@@ -135,6 +137,7 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f,
 	f->tail = cell;
 	if (f->head == NULL)
 		f->head = cell;
+	cell->next = NULL;
 	f->cells++;
 	spin_unlock_irqrestore(&f->lock, flags);
 
@@ -214,6 +217,8 @@ void snd_seq_fifo_cell_putback(struct snd_seq_fifo *f,
 		spin_lock_irqsave(&f->lock, flags);
 		cell->next = f->head;
 		f->head = cell;
+		if (!f->tail)
+			f->tail = cell;
 		f->cells++;
 		spin_unlock_irqrestore(&f->lock, flags);
 	}