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commit 6d060fa39035d5ff6bb3e720a8119aeb50453e3b
parent e4484a495586dddf989380f89a7c16d43db6790b
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 18 Jan 2019 06:22:08 +1200

Merge branch 'stable/for-linus-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb

Pull swiotlb fix from Konrad Rzeszutek Wilk:
 "A tiny fix for v5.0-rc2:

  This fixes an issue with GPU cards not working anymore with the DMA
  mapping work Christopher did - as the SWIOTLB is initialized first and
  then free'd (as IOMMU is available) but we forgot to clear our start
  and end entries which are used and BOOM"

* 'stable/for-linus-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: clear io_tlb_start and io_tlb_end in swiotlb_exit

Diffstat:
Mkernel/dma/swiotlb.c | 2++
1 file changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c @@ -378,6 +378,8 @@ void __init swiotlb_exit(void) memblock_free_late(io_tlb_start, PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT)); } + io_tlb_start = 0; + io_tlb_end = 0; io_tlb_nslabs = 0; max_segment = 0; }