drm/i915: Pull printing GT capabilities on error to err_print_gt

We try not to assume that we captured any information, and so have to
check that error->gt exists before reporting. This check was missed in
err_print_capabilities, so lets break up the capability info and push it
into the GT dump.

We are still a long way from yamlifying this output!
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 792592e7 ("drm/i915: Move the engine mask to intel_gt_info")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200710193239.5419-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -626,8 +626,6 @@ static void err_print_capabilities(struct drm_i915_error_state_buf *m,
 
 	intel_device_info_print_static(&error->device_info, &p);
 	intel_device_info_print_runtime(&error->runtime_info, &p);
-	intel_gt_info_print(&error->gt->info, &p);
-	intel_sseu_print_topology(&error->gt->info.sseu, &p);
 	intel_driver_caps_print(&error->driver_caps, &p);
 }
 
@@ -678,6 +676,15 @@ static void err_free_sgl(struct scatterlist *sgl)
 	}
 }
 
+static void err_print_gt_info(struct drm_i915_error_state_buf *m,
+			      struct intel_gt_coredump *gt)
+{
+	struct drm_printer p = i915_error_printer(m);
+
+	intel_gt_info_print(&gt->info, &p);
+	intel_sseu_print_topology(&gt->info.sseu, &p);
+}
+
 static void err_print_gt(struct drm_i915_error_state_buf *m,
 			 struct intel_gt_coredump *gt)
 {
@@ -734,6 +741,8 @@ static void err_print_gt(struct drm_i915_error_state_buf *m,
 
 	if (gt->uc)
 		err_print_uc(m, gt->uc);
+
+	err_print_gt_info(m, gt);
 }
 
 static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,