From 42ef344c0994cc453477afdc7a8eadc578ed0257 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Mon, 23 Nov 2015 17:39:11 -0500 Subject: [PATCH] drm/radeon: Fix off-by-one errors in radeon_vm_bo_set_addr MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit eoffset is sometimes treated as the last address inside the address range, and sometimes as the first address outside the range. This was resulting in errors when a test filled up the entire address space. Make it consistent to always be the last address within the range. Also fixed related errors when checking the VA limit and in radeon_vm_fence_pts. Signed-off-by: Felix.Kuehling Reviewed-by: Christian König Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/radeon_vm.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c index 48d97c040f49..3979632b9225 100644 --- a/drivers/gpu/drm/radeon/radeon_vm.c +++ b/drivers/gpu/drm/radeon/radeon_vm.c @@ -455,15 +455,15 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, if (soffset) { /* make sure object fit at this offset */ - eoffset = soffset + size; + eoffset = soffset + size - 1; if (soffset >= eoffset) { r = -EINVAL; goto error_unreserve; } last_pfn = eoffset / RADEON_GPU_PAGE_SIZE; - if (last_pfn > rdev->vm_manager.max_pfn) { - dev_err(rdev->dev, "va above limit (0x%08X > 0x%08X)\n", + if (last_pfn >= rdev->vm_manager.max_pfn) { + dev_err(rdev->dev, "va above limit (0x%08X >= 0x%08X)\n", last_pfn, rdev->vm_manager.max_pfn); r = -EINVAL; goto error_unreserve; @@ -478,7 +478,7 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, eoffset /= RADEON_GPU_PAGE_SIZE; if (soffset || eoffset) { struct interval_tree_node *it; - it = interval_tree_iter_first(&vm->va, soffset, eoffset - 1); + it = interval_tree_iter_first(&vm->va, soffset, eoffset); if (it && it != &bo_va->it) { struct radeon_bo_va *tmp; tmp = container_of(it, struct radeon_bo_va, it); @@ -518,7 +518,7 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev, if (soffset || eoffset) { spin_lock(&vm->status_lock); bo_va->it.start = soffset; - bo_va->it.last = eoffset - 1; + bo_va->it.last = eoffset; list_add(&bo_va->vm_status, &vm->cleared); spin_unlock(&vm->status_lock); interval_tree_insert(&bo_va->it, &vm->va); @@ -888,7 +888,7 @@ static void radeon_vm_fence_pts(struct radeon_vm *vm, unsigned i; start >>= radeon_vm_block_size; - end >>= radeon_vm_block_size; + end = (end - 1) >> radeon_vm_block_size; for (i = start; i <= end; ++i) radeon_bo_fence(vm->page_tables[i].bo, fence, true); -- 2.20.1