commit 60aa70542b647cda358624b02921f733ce8b1be4
author Takashi Iwai <tiwai@suse.de> Sun Mar 12 08:14:59 2017 +0000
committer android-build-merger <android-build-merger@google.com> Sun Mar 12 08:14:59 2017 +0000
tree 028c40a052520ec10c510086413405f6c1f7874e
parent d7d6a15fb8d6ff98ba0790bc6618884a50c76b14
parent 09cd5d3479b930f5cde8ed4d66784e724ffcf08c

ALSA: seq: Fix link corruption by event error handling
am: 09cd5d3479

Change-Id: I57ce19f2798f3d059d592706a79627d2d5fa35da

sound/core/seq/seq_fifo.c

diff --git a/sound/core/seq/seq_fifo.c b/sound/core/seq/seq_fifo.c
index 1d5acbe..86240d0 100644
--- a/sound/core/seq/seq_fifo.c
+++ b/sound/core/seq/seq_fifo.c
@@ -135,6 +135,7 @@
 	f->tail = cell;
 	if (f->head == NULL)
 		f->head = cell;
+	cell->next = NULL;
 	f->cells++;
 	spin_unlock_irqrestore(&f->lock, flags);
 
@@ -214,6 +215,8 @@
 		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);
 	}