[PATCH] drm/xe/vf: Don't touch GuC irq registers if using memory irqs

[Michal Wajdeczko <michal.wajdeczko@intel.com>]

On platforms where VFs are using memory based interrupts, we
missed invalid access to no longer existing interrupt registers,
as we keep them marked with XE_REG_OPTION_VF. To fix that just
either setup memirq vectors in GuC or enable legacy interrupts.

Fixes: aef4eb7c7dec ("drm/xe/vf: Setup memory based interrupts in GuC")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
---
 drivers/gpu/drm/xe/xe_guc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 0e1a5674ef13..7ecb509c87d7 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -854,8 +854,6 @@ int xe_guc_enable_communication(struct xe_guc *guc)
 	struct xe_device *xe = guc_to_xe(guc);
 	int err;
 
-	guc_enable_irq(guc);
-
 	if (IS_SRIOV_VF(xe) && xe_device_has_memirq(xe)) {
 		struct xe_gt *gt = guc_to_gt(guc);
 		struct xe_tile *tile = gt_to_tile(gt);
@@ -863,6 +861,8 @@ int xe_guc_enable_communication(struct xe_guc *guc)
 		err = xe_memirq_init_guc(&tile->sriov.vf.memirq, guc);
 		if (err)
 			return err;
+	} else {
+		guc_enable_irq(guc);
 	}
 
 	xe_mmio_rmw32(guc_to_gt(guc), PMINTRMSK,
-- 
2.43.0