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-rw-r--r--drivers/gpu/nvgpu/gk20a/mm_gk20a.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
index 2e26ff44..b0c864d4 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
@@ -873,6 +873,12 @@ static void gk20a_vm_unmap_user(struct vm_gk20a *vm, u64 offset,
873 mutex_lock(&vm->update_gmmu_lock); 873 mutex_lock(&vm->update_gmmu_lock);
874 } 874 }
875 875
876 if (mapped_buffer->user_mapped == 0) {
877 mutex_unlock(&vm->update_gmmu_lock);
878 gk20a_err(d, "addr already unmapped from user 0x%llx", offset);
879 return;
880 }
881
876 mapped_buffer->user_mapped--; 882 mapped_buffer->user_mapped--;
877 if (mapped_buffer->user_mapped == 0) 883 if (mapped_buffer->user_mapped == 0)
878 vm->num_user_mapped_buffers--; 884 vm->num_user_mapped_buffers--;