diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/pci-nommu_64.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/pci-nommu_64.c b/arch/x86/kernel/pci-nommu_64.c index c6901e751770..8d036aee2a8d 100644 --- a/arch/x86/kernel/pci-nommu_64.c +++ b/arch/x86/kernel/pci-nommu_64.c @@ -30,6 +30,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size, int direction) { dma_addr_t bus = paddr; + WARN_ON(size == 0); if (!check_addr("map_single", hwdev, bus, size)) return bad_dma_address; flush_write_buffers(); @@ -58,6 +59,8 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg, struct scatterlist *s; int i; + WARN_ON(nents == 0 || sg[0].length == 0); + for_each_sg(sg, s, nents, i) { BUG_ON(!sg_page(s)); s->dma_address = sg_phys(s); |