redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

intel-iommu: Mask physical address to correct page size in intel_map_single() 

The physical address passed to domain_pfn_mapping() should be rounded 
down to the start of the MM page, not the VT-d page.

This issue causes kernel panic on PAGE_SIZE>VTD_PAGE_SIZE platforms e.g. ia64
platforms.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
wifi-calibration
Fenghua Yu 2009-08-04 15:10:59 -07:00 committed by David Woodhouse
parent f532959b77
commit 33041ec049
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/pci/intel-iommu.c
View File

@ -2551,6 +2551,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
int prot = 0;
int ret;
struct intel_iommu *iommu;
unsigned long paddr_pfn = paddr >> PAGE_SHIFT;
BUG_ON(dir == DMA_NONE);
@ -2585,7 +2586,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
* is not a big problem
*/
ret = domain_pfn_mapping(domain, mm_to_dma_pfn(iova->pfn_lo),
paddr >> VTD_PAGE_SHIFT, size, prot);
mm_to_dma_pfn(paddr_pfn), size, prot);
if (ret)
goto error;