diff options
Diffstat (limited to 'kernel/dma/swiotlb.c')
| -rw-r--r-- | kernel/dma/swiotlb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index bedc9f945836..a01b83e95a2a 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -483,6 +483,10 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, * request and allocate a buffer from that IO TLB pool. */ spin_lock_irqsave(&io_tlb_lock, flags); + + if (unlikely(nslots > io_tlb_nslabs - io_tlb_used)) + goto not_found; + index = ALIGN(io_tlb_index, stride); if (index >= io_tlb_nslabs) index = 0; |