[PATCH] drm/xe: Use distinct error code in VM_CREATE for device fault mode checks

[Brian Welty]

vm_create_ioctl doesn't allow creating new VM in fault_mode while existing
VMs are in non-fault mode, and vice-versa.
This is not necessarily the user doing anything wrong if others are sharing
the system. Instead of returning -EINVAL which suggests the user provided a
bad argument, return distinct error code of -EBUSY for this class of errors
so the user knows they can retry the vm_create when system is idle.

Signed-off-by: Brian Welty <brian.welty at intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 85d6f359142d..e8628a982db6 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -1840,16 +1840,16 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
 			 args->flags & DRM_XE_VM_CREATE_FLAG_FAULT_MODE))
 		return -EINVAL;
 
+	if (XE_IOCTL_DBG(xe, args->extensions))
+		return -EINVAL;
+
 	if (XE_IOCTL_DBG(xe, args->flags & DRM_XE_VM_CREATE_FLAG_FAULT_MODE &&
 			 xe_device_in_non_fault_mode(xe)))
-		return -EINVAL;
+		return -EBUSY;
 
 	if (XE_IOCTL_DBG(xe, !(args->flags & DRM_XE_VM_CREATE_FLAG_FAULT_MODE) &&
 			 xe_device_in_fault_mode(xe)))
-		return -EINVAL;
-
-	if (XE_IOCTL_DBG(xe, args->extensions))
-		return -EINVAL;
+		return -EBUSY;
 
 	if (args->flags & DRM_XE_VM_CREATE_FLAG_SCRATCH_PAGE)
 		flags |= XE_VM_FLAG_SCRATCH_PAGE;
-- 
2.43.0