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From 713f9a84a1a3c4fdae75727c80c84aa14b72490b Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Mon, 23 Nov 2015 17:43:48 -0500
Subject: [PATCH 0970/1050] drm/amdgpu: Fix off-by-one errors in
amdgpu_vm_bo_map
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
eaddr 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.
Change-Id: I3a14b1372bb2e6052824f250c0c0fa7cd4606800
Signed-off-by: Felix.Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index e9b36a0..f3b07bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1006,13 +1006,13 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
return -EINVAL;
/* make sure object fit at this offset */
- eaddr = saddr + size;
+ eaddr = saddr + size - 1;
if ((saddr >= eaddr) || (offset + size > amdgpu_bo_size(bo_va->bo)))
return -EINVAL;
last_pfn = eaddr / AMDGPU_GPU_PAGE_SIZE;
- if (last_pfn > adev->vm_manager.max_pfn) {
- dev_err(adev->dev, "va above limit (0x%08X > 0x%08X)\n",
+ if (last_pfn >= adev->vm_manager.max_pfn) {
+ dev_err(adev->dev, "va above limit (0x%08X >= 0x%08X)\n",
last_pfn, adev->vm_manager.max_pfn);
return -EINVAL;
}
@@ -1021,7 +1021,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
eaddr /= AMDGPU_GPU_PAGE_SIZE;
spin_lock(&vm->it_lock);
- it = interval_tree_iter_first(&vm->va, saddr, eaddr - 1);
+ it = interval_tree_iter_first(&vm->va, saddr, eaddr);
spin_unlock(&vm->it_lock);
if (it) {
struct amdgpu_bo_va_mapping *tmp;
@@ -1042,7 +1042,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
INIT_LIST_HEAD(&mapping->list);
mapping->it.start = saddr;
- mapping->it.last = eaddr - 1;
+ mapping->it.last = eaddr;
mapping->offset = offset;
mapping->flags = flags;
--
1.9.1
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