[PATCH 03/10] drm/i915/guc: Disallow guc log relay usage when FW is not loaded

[Michał Winiarski]

Now that we're leaving the driver in wedged state on FW load failure, we
should also disallow relay usage.
Failing to do so will result in futile attempts to inform GuC that it
needs to flush the log, which in turn will result in a WARN on our end.

Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski at intel.com>
---
 drivers/gpu/drm/i915/intel_guc_log.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_guc_log.c b/drivers/gpu/drm/i915/intel_guc_log.c
index 6da61a71d28f..8bc39bd0a3a3 100644
--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -551,6 +551,9 @@ int intel_guc_log_relay_open(struct intel_guc_log *log)
 {
 	int ret;
 
+	if (!intel_uc_fw_is_loaded(&log_to_guc(log)->fw))
+		return -ENODEV;
+
 	mutex_lock(&log->relay.lock);
 
 	if (intel_guc_log_relay_enabled(log)) {
-- 
2.17.1