ping
On 5/28/2026 1:46 PM, Xiaogang.Chen wrote:
From: Xiaogang Chen <[email protected]>
If inx from find_first_zero_bit is beyond range not need set doorbell_bitmap.
Signed-off-by: Xiaogang Chen <[email protected]>
---
drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
index 05c74887fd6f..18785d3bec4b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
@@ -153,14 +153,16 @@ void __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
u32 inx;
mutex_lock(&kfd->doorbell_mutex);
+
inx = find_first_zero_bit(kfd->doorbell_bitmap, PAGE_SIZE /
sizeof(u32));
+ if (inx >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS){
+ mutex_unlock(&kfd->doorbell_mutex);
+ return NULL;
+ }
__set_bit(inx, kfd->doorbell_bitmap);
mutex_unlock(&kfd->doorbell_mutex);
- if (inx >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
- return NULL;
-
*doorbell_off = amdgpu_doorbell_index_on_bar(kfd->adev,
kfd->doorbells,
inx,
