2 files changed, 30 insertions, 15 deletions

diff --git a/lib/list_debug.c b/lib/list_debug.c
index 344c710d16c..b8029a5583f 100644
--- a/lib/list_debug.c
+++ b/lib/list_debug.c
@@ -35,6 +35,31 @@ void __list_add(struct list_head *new,
 }
 EXPORT_SYMBOL(__list_add);
 
+void __list_del_entry(struct list_head *entry)
+{
+        struct list_head *prev, *next;
+
+        prev = entry->prev;
+        next = entry->next;
+
+        if (WARN(next == LIST_POISON1,
+                "list_del corruption, %p->next is LIST_POISON1 (%p)\n",
+                entry, LIST_POISON1) ||
+            WARN(prev == LIST_POISON2,
+                "list_del corruption, %p->prev is LIST_POISON2 (%p)\n",
+                entry, LIST_POISON2) ||
+            WARN(prev->next != entry,
+                "list_del corruption. prev->next should be %p, "
+                "but was %p\n", entry, prev->next) ||
+            WARN(next->prev != entry,
+                "list_del corruption. next->prev should be %p, "
+                "but was %p\n", entry, next->prev))
+                return;
+
+        __list_del(prev, next);
+}
+EXPORT_SYMBOL(__list_del_entry);
+
 /**
  * list_del - deletes entry from list.
  * @entry: the element to delete from the list.
@@ -43,19 +68,7 @@ EXPORT_SYMBOL(__list_add);
  */
 void list_del(struct list_head *entry)
 {
-        WARN(entry->next == LIST_POISON1,
-                "list_del corruption, next is LIST_POISON1 (%p)\n",
-                LIST_POISON1);
-        WARN(entry->next != LIST_POISON1 && entry->prev == LIST_POISON2,
-                "list_del corruption, prev is LIST_POISON2 (%p)\n",
-                LIST_POISON2);
-        WARN(entry->prev->next != entry,
-                "list_del corruption. prev->next should be %p, "
-                "but was %p\n", entry, entry->prev->next);
-        WARN(entry->next->prev != entry,
-                "list_del corruption. next->prev should be %p, "
-                "but was %p\n", entry, entry->next->prev);
-        __list_del(entry->prev, entry->next);
+        __list_del_entry(entry);
         entry->next = LIST_POISON1;
         entry->prev = LIST_POISON2;
 }
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index c47bbe11b80..93ca08b8a45 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -686,8 +686,10 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
         /*
          * Ensure that the address returned is DMA'ble
          */
-        if (!dma_capable(dev, dev_addr, size))
-                panic("map_single: bounce buffer is not DMA'ble");
+        if (!dma_capable(dev, dev_addr, size)) {
+                swiotlb_tbl_unmap_single(dev, map, size, dir);
+                dev_addr = swiotlb_virt_to_bus(dev, io_tlb_overflow_buffer);
+        }
 
         return dev_addr;
 }