drm/i915/uc: do not free err log on uc_fini

We need to keep the GuC error logs around to debug the load failure,
so we can't clean them in the error unwind, which includes uc_fini().
Moving the cleanup to driver remove ensures that the logs stick around
long enough for us to dump them.

v2: reword commit msg (John)
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200326181121.16869-7-daniele.ceraolospurio@intel.com

drivers/gpu/drm/i915/gt/intel_gt.c

@@ -635,8 +635,7 @@ void intel_gt_driver_remove(struct intel_gt *gt)
 {
 	__intel_gt_disable(gt);
 
-	intel_uc_fini_hw(&gt->uc);
-	intel_uc_fini(&gt->uc);
+	intel_uc_driver_remove(&gt->uc);
 
 	intel_engines_release(gt);
 }

drivers/gpu/drm/i915/gt/uc/intel_uc.c

@@ -131,6 +131,13 @@ static void __uc_free_load_err_log(struct intel_uc *uc)
 		i915_gem_object_put(log);
 }
 
+void intel_uc_driver_remove(struct intel_uc *uc)
+{
+	intel_uc_fini_hw(uc);
+	intel_uc_fini(uc);
+	__uc_free_load_err_log(uc);
+}
+
 static inline bool guc_communication_enabled(struct intel_guc *guc)
 {
 	return intel_guc_ct_enabled(&guc->ct);
@@ -311,8 +318,6 @@ static void __uc_fini(struct intel_uc *uc)
 {
 	intel_huc_fini(&uc->huc);
 	intel_guc_fini(&uc->guc);
-
-	__uc_free_load_err_log(uc);
 }
 
 static int __uc_sanitize(struct intel_uc *uc)

drivers/gpu/drm/i915/gt/uc/intel_uc.h

@@ -34,6 +34,7 @@ struct intel_uc {
 
 void intel_uc_init_early(struct intel_uc *uc);
 void intel_uc_driver_late_release(struct intel_uc *uc);
+void intel_uc_driver_remove(struct intel_uc *uc);
 void intel_uc_init_mmio(struct intel_uc *uc);
 void intel_uc_reset_prepare(struct intel_uc *uc);
 void intel_uc_suspend(struct intel_uc *uc);