drm/i915/psr: Initialize PSR mutex even when sink is not reliable

Even when driver is reloaded and hits this scenario the PSR mutex
should be initialized, otherwise reading PSR debugfs status will
execute mutex_lock() over a mutex that was not initialized.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190406005112.27205-3-jose.souza@intel.com

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 361d231c888bdad2337c56b825f209b2ee1c9b13..cc8b5be68e89365e816f52f08776cc69907b8f8d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -1230,7 +1230,6 @@ void intel_psr_init(struct drm_i915_private *dev_priv)
        if (val) {
                DRM_DEBUG_KMS("PSR interruption error set\n");
                dev_priv->psr.sink_not_reliable = true;
-               return;
        }
 
        /* Set link_standby x link_off defaults */