3.2.55-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Thomas Hellstrom <[email protected]> commit d386735588c3e22129c2bc6eb64fc1d37a8f805c upstream. VMAs covering a bo but that didn't start at the same address space offset as the bo they were mapping were incorrectly generating SEGFAULT errors in the fault handler. Reported-by: Joseph Dolinak <[email protected]> Signed-off-by: Thomas Hellstrom <[email protected]> Reviewed-by: Jakob Bornecrantz <[email protected]> [bwh: Backported to 3.2: drm_vma_node_start() is open-coded; vma_pages() was open-coded] Signed-off-by: Ben Hutchings <[email protected]> --- drivers/gpu/drm/ttm/ttm_bo_vm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -144,9 +144,9 @@ static int ttm_bo_vm_fault(struct vm_are } page_offset = ((address - vma->vm_start) >> PAGE_SHIFT) + - bo->vm_node->start - vma->vm_pgoff; - page_last = ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT) + - bo->vm_node->start - vma->vm_pgoff; + vma->vm_pgoff - bo->vm_node->start; + page_last = vma_pages(vma) + vma->vm_pgoff - + bo->vm_node->start; if (unlikely(page_offset >= bo->num_pages)) { retval = VM_FAULT_SIGBUS; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
