diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_process.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_process.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index ff34bb1ac9db..87cd52cf4ee9 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -854,8 +854,10 @@ struct kfd_process *kfd_create_process(struct task_struct *thread) goto out; } - /* A prior open of /dev/kfd could have already created the process. */ - process = find_process(thread, false); + /* A prior open of /dev/kfd could have already created the process. + * find_process will increase process kref in this case + */ + process = find_process(thread, true); if (process) { pr_debug("Process already found\n"); } else { @@ -903,8 +905,6 @@ struct kfd_process *kfd_create_process(struct task_struct *thread) init_waitqueue_head(&process->wait_irq_drain); } out: - if (!IS_ERR(process)) - kref_get(&process->ref); mutex_unlock(&kfd_processes_mutex); mmput(thread->mm); @@ -1190,10 +1190,8 @@ static void kfd_process_ref_release(struct kref *ref) static struct mmu_notifier *kfd_process_alloc_notifier(struct mm_struct *mm) { - int idx = srcu_read_lock(&kfd_processes_srcu); - struct kfd_process *p = find_process_by_mm(mm); - - srcu_read_unlock(&kfd_processes_srcu, idx); + /* This increments p->ref counter if kfd process p exists */ + struct kfd_process *p = kfd_lookup_process_by_mm(mm); return p ? &p->mmu_notifier : ERR_PTR(-ESRCH); } |