---

yaml
---
r: 68023
b: refs/heads/master
c: aa24886
h: refs/heads/master
i:
  68021: b701f9b
  68019: ab59d67
  68015: 6076df7
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fa007d8bebc5d812a445c48664b5bcad81f1351c
+refs/heads/master: aa24886e379d2b641c5117e178b15ce1d5d366ba

trunk/Documentation/DMA-API.txt

@@ -68,6 +68,9 @@ size and dma_handle must all be the same as those passed into the
 consistent allocate.  cpu_addr must be the virtual address returned by
 the consistent allocate.
 
+Note that unlike their sibling allocation calls, these routines
+may only be called with IRQs enabled.
+
 
 Part Ib - Using small dma-coherent buffers
 ------------------------------------------

trunk/arch/x86/kernel/pci-dma_32.c

@@ -63,7 +63,8 @@ void dma_free_coherent(struct device *dev, size_t size,
 {
 	struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
 	int order = get_order(size);
-
+
+	WARN_ON(irqs_disabled());	/* for portability */
 	if (mem && vaddr >= mem->virt_base && vaddr < (mem->virt_base + (mem->size << PAGE_SHIFT))) {
 		int page = (vaddr - mem->virt_base) >> PAGE_SHIFT;
 

trunk/arch/x86/kernel/pci-dma_64.c

@@ -167,6 +167,7 @@ EXPORT_SYMBOL(dma_alloc_coherent);
 void dma_free_coherent(struct device *dev, size_t size,
 			 void *vaddr, dma_addr_t bus)
 {
+	WARN_ON(irqs_disabled());	/* for portability */
 	if (dma_ops->unmap_single)
 		dma_ops->unmap_single(dev, bus, size, 0);
 	free_pages((unsigned long)vaddr, get_order(size));

trunk/lib/swiotlb.c

@@ -497,6 +497,7 @@ void
 swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
 		      dma_addr_t dma_handle)
 {
+	WARN_ON(irqs_disabled());
 	if (!(vaddr >= (void *)io_tlb_start
                     && vaddr < (void *)io_tlb_end))
 		free_pages((unsigned long) vaddr, get_order(size));