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Commit 99331a51 authored by Oded Gabbay's avatar Oded Gabbay
Browse files

drm/amdkfd: Replace cpu_relax() with schedule() in DQM 



In order not to occupy the current core and thus prevent the core from
servicing IOMMU PPR requests, this patch replaces the call in DQM to
cpu_relax() with a call to schedule().

Signed-off-by: default avatarOded Gabbay <oded.gabbay@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f0ec5b99

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

+2 −1
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/types.h>

#include <linux/printk.h>

#include <linux/bitops.h>

#include <linux/sched.h>

#include "kfd_priv.h"

#include "kfd_device_queue_manager.h"

#include "kfd_mqd_manager.h"
@@ -829,7 +830,7 @@ static int fence_wait_timeout(unsigned int *fence_addr, 
			pr_err("kfd: qcm fence wait loop timeout expired\n");

			return -ETIME;

		}

		cpu_relax();

		schedule();

	}



	return 0;