Merge tag 'drm-amdkfd-fixes-2018-04-24' of...

Merge tag 'drm-amdkfd-fixes-2018-04-24' of git://people.freedesktop.org/~gabbayo/linux into drm-fixes

- fix amdkfd Kconfig to select MMU_NOTIFIER
- allow clock retrieval in case GPU not present
- fix return code from function
- make function static (fix sparse warning)

* tag 'drm-amdkfd-fixes-2018-04-24' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: fix build, select MMU_NOTIFIER
  drm/amdkfd: fix clock counter retrieval for node without GPU
  drm/amdkfd: Fix the error return code in kfd_ioctl_unmap_memory_from_gpu()
  drm/amdkfd: kfd_dev_is_large_bar() can be static

drivers/gpu/drm/amd/amdkfd/Kconfig

@@ -6,5 +6,6 @@ config HSA_AMD
 	tristate "HSA kernel driver for AMD GPU devices"
 	depends on DRM_AMDGPU && X86_64
 	imply AMD_IOMMU_V2
+	select MMU_NOTIFIER
 	help
 	  Enable this if you want to use HSA features on AMD GPU devices.

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

@@ -749,12 +749,13 @@ static int kfd_ioctl_get_clock_counters(struct file *filep,
 	struct timespec64 time;
 
 	dev = kfd_device_by_id(args->gpu_id);
-	if (dev == NULL)
-		return -EINVAL;
-
-	/* Reading GPU clock counter from KGD */
-	args->gpu_clock_counter =
-		dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
+	if (dev)
+		/* Reading GPU clock counter from KGD */
+		args->gpu_clock_counter =
+			dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
+	else
+		/* Node without GPU resource */
+		args->gpu_clock_counter = 0;
 
 	/* No access to rdtsc. Using raw monotonic time */
 	getrawmonotonic64(&time);
@@ -1147,7 +1148,7 @@ static int kfd_ioctl_acquire_vm(struct file *filep, struct kfd_process *p,
 	return ret;
 }
 
-bool kfd_dev_is_large_bar(struct kfd_dev *dev)
+static bool kfd_dev_is_large_bar(struct kfd_dev *dev)
 {
 	struct kfd_local_mem_info mem_info;
 
@@ -1421,7 +1422,7 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
 
 	pdd = kfd_get_process_device_data(dev, p);
 	if (!pdd) {
-		err = PTR_ERR(pdd);
+		err = -EINVAL;
 		goto bind_process_to_device_failed;
 	}