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Commit c7b1243e authored by Felix Kuehling's avatar Felix Kuehling Committed by Oded Gabbay
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drm/amdkfd: Get reference to lead_thread task struct 



Increment the kfd_process.lead_thread's reference counter to make
it safe to dereference. This is needed for getting a safe reference
to the process' mm_struct.

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 851a645e

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

+4 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/log2.h>

#include <linux/sched.h>

#include <linux/sched/mm.h>

#include <linux/sched/task.h>

#include <linux/slab.h>

#include <linux/amd-iommu.h>

#include <linux/notifier.h>
@@ -191,6 +192,8 @@ static void kfd_process_wq_release(struct work_struct *work) 


	mutex_destroy(&p->mutex);



	put_task_struct(p->lead_thread);



	kfree(p);



	kfree(work);
@@ -342,6 +345,7 @@ static struct kfd_process *create_process(const struct task_struct *thread) 
			(uintptr_t)process->mm);



	process->lead_thread = thread->group_leader;

	get_task_struct(process->lead_thread);



	INIT_LIST_HEAD(&process->per_device_data);