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Commit 82c16b42 authored by Yong Zhao's avatar Yong Zhao Committed by Oded Gabbay
Browse files

drm/amdkfd: Return NULL if kfd_lookup_process_by_pasid fails 



If no matching process is found, return NULL instead of a pointer
to the last process in the kfd_processes_table.

Signed-off-by: default avatarYong Zhao <yong.zhao@amd.com>
Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent abb208a8

drivers/gpu/drm/amd/amdkfd/kfd_process.c

+3 −2
Original line number Original line Diff line number Diff line
@@ -570,7 +570,7 @@ bool kfd_has_process_device_data(struct kfd_process *p) 
/* This increments the process->ref counter. */

/* This increments the process->ref counter. */

struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid)

struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid)

{

{

	struct kfd_process *p;

	struct kfd_process *p, *ret_p = NULL;

	unsigned int temp;

	unsigned int temp;





	int idx = srcu_read_lock(&kfd_processes_srcu);

	int idx = srcu_read_lock(&kfd_processes_srcu);
@@ -578,13 +578,14 @@ struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid) 
	hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {

	hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {

		if (p->pasid == pasid) {

		if (p->pasid == pasid) {

			kref_get(&p->ref);

			kref_get(&p->ref);

			ret_p = p;

			break;

			break;

		}

		}

	}

	}





	srcu_read_unlock(&kfd_processes_srcu, idx);

	srcu_read_unlock(&kfd_processes_srcu, idx);





	return p;

	return ret_p;

}

}





int kfd_reserved_mem_mmap(struct kfd_process *process,

int kfd_reserved_mem_mmap(struct kfd_process *process,