Commit b6584065 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'core-fixes-for-linus' of...

Merge branch 'core-fixes-for-linus' of git://

* 'core-fixes-for-linus' of git://
  swiotlb: use coherent_dma_mask in alloc_coherent
  MAINTAINERS: remove me as RAID maintainer
parents 376fdd2a 1e74f300
......@@ -3928,8 +3928,6 @@ M:
S: Maintained
P: Ingo Molnar
P: Neil Brown
......@@ -467,9 +467,13 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t dev_addr;
void *ret;
int order = get_order(size);
u64 dma_mask = DMA_32BIT_MASK;
if (hwdev && hwdev->coherent_dma_mask)
dma_mask = hwdev->coherent_dma_mask;
ret = (void *)__get_free_pages(flags, order);
if (ret && address_needs_mapping(hwdev, virt_to_bus(ret), size)) {
if (ret && !is_buffer_dma_capable(dma_mask, virt_to_bus(ret), size)) {
* The allocated memory isn't reachable by the device.
* Fall back on swiotlb_map_single().
......@@ -493,9 +497,9 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dev_addr = virt_to_bus(ret);
/* Confirm address can be DMA'd by device */
if (address_needs_mapping(hwdev, dev_addr, size)) {
if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) {
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
(unsigned long long)*hwdev->dma_mask,
(unsigned long long)dma_mask,
(unsigned long long)dev_addr);
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
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