list: refine list_item_del to avoid make list chaos

xiulipan · xiulipan · commit 886e2ae698fb · 2018-09-06T16:49:18.000+08:00
There are possible that we call list_item_del to same list item twice. This
will cause the list be into chaos. Reset the next and prev pointer to 0
to avoid risk.

Signed-off-by: Pan Xiuli &lt;xiuli.pan@linux.intel.com&gt;
diff --git a/src/include/sof/list.h b/src/include/sof/list.h
@@ -77,6 +77,7 @@ static inline void list_item_del(struct list_item *item)
 {
 	item->next->prev = item->prev;
 	item->prev->next = item->next;
+	list_init(item);
 }
 
 /* is list item the last item in list ? */

Original file line number	Diff line number	Diff line change
`@@ -77,6 +77,7 @@ static inline void list_item_del(struct list_item *item)`
`77`	`77`	`{`
`78`	`78`	`item->next->prev = item->prev;`
`79`	`79`	`item->prev->next = item->next;`
	`80`	`+ list_init(item);`
`80`	`81`	`}`
`81`	`82`
`82`	`83`	`/* is list item the last item in list ? */`