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drm/amdkfd: Fix 'node' NULL check in 'svm_range_get_range_boundaries()' 

[ Upstream commit d7a254fad873775ce6c32b77796c81e81e6b7f2e ]

Range interval [start, last] is ordered by rb_tree, rb_prev, rb_next
return value still needs NULL check, thus modified from "node" to "rb_node".

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:2691 svm_range_get_range_boundaries() warn: can 'node' even be NULL?

Suggested-by: Philip Yang <Philip.Yang@amd.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Srinivasan Shanmugam 2024-01-09 16:57:26 +05:30 committed by Greg Kroah-Hartman
parent 7513f0906c
commit 8eea7e1d69
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
View File

@ -2553,6 +2553,7 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr,
{
struct vm_area_struct *vma;
struct interval_tree_node *node;
struct rb_node *rb_node;
unsigned long start_limit, end_limit;
vma = find_vma(p->mm, addr << PAGE_SHIFT);
@ -2575,16 +2576,15 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr,
if (node) {
end_limit = min(end_limit, node->start);
/* Last range that ends before the fault address */
node = container_of(rb_prev(&node->rb),
struct interval_tree_node, rb);
rb_node = rb_prev(&node->rb);
} else {
/* Last range must end before addr because
* there was no range after addr
*/
node = container_of(rb_last(&p->svms.objects.rb_root),
struct interval_tree_node, rb);
rb_node = rb_last(&p->svms.objects.rb_root);
}
if (node) {
if (rb_node) {
node = container_of(rb_node, struct interval_tree_node, rb);
if (node->last >= addr) {
WARN(1, "Overlap with prev node and page fault addr\n");
return -EFAULT;