[PATCH] Fix Incorrect VMIDs passed to HWS

[Tushar Patel]

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_device.c | 21 ++++++++++++---------
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 4c20c23d6ba0..bda1b5132ee8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -680,7 +680,7 @@ MODULE_PARM_DESC(sched_policy,
  * Maximum number of processes that HWS can schedule concurrently. The maximum is the
  * number of VMIDs assigned to the HWS, which is also the default.
  */
-int hws_max_conc_proc = 8;
+int hws_max_conc_proc = -1;
 module_param(hws_max_conc_proc, int, 0444);
 MODULE_PARM_DESC(hws_max_conc_proc,
 	"Max # processes HWS can execute concurrently when sched_policy=0 (0 = no concurrency, #VMIDs for KFD = Maximum(default))");
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 339e12c94cff..39073f72fe5f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -483,15 +483,18 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
 	}
 
 	/* Verify module parameters regarding mapped process number*/
-	if ((hws_max_conc_proc < 0)
-			|| (hws_max_conc_proc > kfd->vm_info.vmid_num_kfd)) {
-		dev_err(kfd_device,
-			"hws_max_conc_proc %d must be between 0 and %d, use %d instead\n",
-			hws_max_conc_proc, kfd->vm_info.vmid_num_kfd,
-			kfd->vm_info.vmid_num_kfd);
-		kfd->max_proc_per_quantum = kfd->vm_info.vmid_num_kfd;
-	} else
-		kfd->max_proc_per_quantum = hws_max_conc_proc;
+	kfd->max_proc_per_quantum = kfd->vm_info.vmid_num_kfd;
+	if (hws_max_conc_proc != -1) {
+		if ((hws_max_conc_proc > 0)
+				&& (hws_max_conc_proc < kfd->vm_info.vmid_num_kfd)) {
+			kfd->max_proc_per_quantum = hws_max_conc_proc;
+		} else {
+					dev_err(kfd_device,
+				"hws_max_conc_proc %d must be between 0 and %d, use %d instead\n",
+				hws_max_conc_proc, kfd->vm_info.vmid_num_kfd,
+				kfd->vm_info.vmid_num_kfd);
+		}
+	}
 
 	/* calculate max size of mqds needed for queues */
 	size = max_num_of_queues_per_device *
-- 
2.25.1