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Merge branch 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 

Pull swiotlb fix from Konrad Rzeszutek Wilk:
 "One single fix in here: under Xen the DMA32 heap (in the hypervisor)
  would end up looking like swiss cheese.

  The reason being that for every coherent DMA allocation we didn't do
  the proper hypercall to tell Xen to return the page back to the DMA32
  heap. End result was (eventually) no DMA32 space if you (for example)
  continously unloaded and loaded modules"

* 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent
This commit is contained in:
Linus Torvalds 2018-05-24 14:42:43 -07:00
parent 34b48b8789 4855c92dbb
commit b50694381c
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/swiotlb-xen.c
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@ -351,7 +351,7 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
* physical address */
phys = xen_bus_to_phys(dev_addr);
if (((dev_addr + size - 1 > dma_mask)) ||
if (((dev_addr + size - 1 <= dma_mask)) ||
range_straddles_page_boundary(phys, size))
xen_destroy_contiguous_region(phys, order);