diff mbox series

drm/amdkfd: use vma_lookup() instead of find_vma()

Message ID 20221020082020.1589-1-wangdeming@inspur.com
State New
Headers
Series drm/amdkfd: use vma_lookup() instead of find_vma() |

Commit Message

Deming Wang Oct. 20, 2022, 8:20 a.m. UTC 
  Using vma_lookup() verifies the start address is contained in the found
vma.  This results in easier to read the code.

Signed-off-by: Deming Wang <wangdeming@inspur.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

Comments

Felix Kuehling Oct. 20, 2022, 4:50 p.m. UTC | #1 
Am 2022-10-20 um 04:20 schrieb Deming Wang:
> Using vma_lookup() verifies the start address is contained in the found
> vma.  This results in easier to read the code.
>
> Signed-off-by: Deming Wang <wangdeming@inspur.com>

Thank you. This patch is

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>

I squashed it with your earlier patch in kfd_migrate.c and submitted it 
to our amd-staging-drm-next branch.

Regards,
   Felix


> ---
>   drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 17 ++++++++---------
>   1 file changed, 8 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> index 64fdf63093a0..0100812478b2 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> @@ -1586,8 +1586,8 @@ static int svm_range_validate_and_map(struct mm_struct *mm,
>   		unsigned long npages;
>   		bool readonly;
>   
> -		vma = find_vma(mm, addr);
> -		if (!vma || addr < vma->vm_start) {
> +		vma = vma_lookup(mm, addr);
> +		if (!vma) {
>   			r = -EFAULT;
>   			goto unreserve_out;
>   		}
> @@ -2542,8 +2542,8 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr,
>   	struct interval_tree_node *node;
>   	unsigned long start_limit, end_limit;
>   
> -	vma = find_vma(p->mm, addr << PAGE_SHIFT);
> -	if (!vma || (addr << PAGE_SHIFT) < vma->vm_start) {
> +	vma = vma_lookup(p->mm, addr << PAGE_SHIFT);
> +	if (!vma) {
>   		pr_debug("VMA does not exist in address [0x%llx]\n", addr);
>   		return -EFAULT;
>   	}
> @@ -2871,8 +2871,8 @@ svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid,
>   	/* __do_munmap removed VMA, return success as we are handling stale
>   	 * retry fault.
>   	 */
> -	vma = find_vma(mm, addr << PAGE_SHIFT);
> -	if (!vma || (addr << PAGE_SHIFT) < vma->vm_start) {
> +	vma = vma_lookup(mm, addr << PAGE_SHIFT);
> +	if (!vma) {
>   		pr_debug("address 0x%llx VMA is removed\n", addr);
>   		r = 0;
>   		goto out_unlock_range;
> @@ -3152,9 +3152,8 @@ svm_range_is_valid(struct kfd_process *p, uint64_t start, uint64_t size)
>   	start <<= PAGE_SHIFT;
>   	end = start + (size << PAGE_SHIFT);
>   	do {
> -		vma = find_vma(p->mm, start);
> -		if (!vma || start < vma->vm_start ||
> -		    (vma->vm_flags & device_vma))
> +		vma = vma_lookup(p->mm, start);
> +		if (!vma || (vma->vm_flags & device_vma))
>   			return -EFAULT;
>   		start = min(end, vma->vm_end);
>   	} while (start < end);
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 64fdf63093a0..0100812478b2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -1586,8 +1586,8 @@  static int svm_range_validate_and_map(struct mm_struct *mm,
 		unsigned long npages;
 		bool readonly;
 
-		vma = find_vma(mm, addr);
-		if (!vma || addr < vma->vm_start) {
+		vma = vma_lookup(mm, addr);
+		if (!vma) {
 			r = -EFAULT;
 			goto unreserve_out;
 		}
@@ -2542,8 +2542,8 @@  svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr,
 	struct interval_tree_node *node;
 	unsigned long start_limit, end_limit;
 
-	vma = find_vma(p->mm, addr << PAGE_SHIFT);
-	if (!vma || (addr << PAGE_SHIFT) < vma->vm_start) {
+	vma = vma_lookup(p->mm, addr << PAGE_SHIFT);
+	if (!vma) {
 		pr_debug("VMA does not exist in address [0x%llx]\n", addr);
 		return -EFAULT;
 	}
@@ -2871,8 +2871,8 @@  svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid,
 	/* __do_munmap removed VMA, return success as we are handling stale
 	 * retry fault.
 	 */
-	vma = find_vma(mm, addr << PAGE_SHIFT);
-	if (!vma || (addr << PAGE_SHIFT) < vma->vm_start) {
+	vma = vma_lookup(mm, addr << PAGE_SHIFT);
+	if (!vma) {
 		pr_debug("address 0x%llx VMA is removed\n", addr);
 		r = 0;
 		goto out_unlock_range;
@@ -3152,9 +3152,8 @@  svm_range_is_valid(struct kfd_process *p, uint64_t start, uint64_t size)
 	start <<= PAGE_SHIFT;
 	end = start + (size << PAGE_SHIFT);
 	do {
-		vma = find_vma(p->mm, start);
-		if (!vma || start < vma->vm_start ||
-		    (vma->vm_flags & device_vma))
+		vma = vma_lookup(p->mm, start);
+		if (!vma || (vma->vm_flags & device_vma))
 			return -EFAULT;
 		start = min(end, vma->vm_end);
 	} while (start < end);