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: Oded Gabbay oded.gabbay@amd.com --- drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c index 102aaba..08cf5b3 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c @@ -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" @@ -827,7 +828,7 @@ 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;