diff options
| author | Christoph Hellwig | 2019-01-14 21:14:08 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk | 2019-01-16 09:59:17 -0500 |
| commit | 227a76b64718888c1687cc237463aa000ae6fb2b (patch) | |
| tree | baf6e0b03405ea007bd7865f1ca75d80fab44001 | |
| parent | 1c7fc5cbc33980acd13d668f1c8f0313d6ae9fd8 (diff) | |
swiotlb: clear io_tlb_start and io_tlb_end in swiotlb_exit
Otherwise is_swiotlb_buffer will return false positives when
we first initialize a swiotlb buffer, but then free it because
we have an IOMMU available.
Fixes: 55897af63091 ("dma-direct: merge swiotlb_dma_ops into the dma_direct code")
Reported-by: Sibren Vasse <sibren@sibrenvasse.nl>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Sibren Vasse <sibren@sibrenvasse.nl>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | kernel/dma/swiotlb.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index d6361776dc5c..1fb6fd68b9c7 100644 --- 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; } |