drm/xe: Initialize ret in mcr_lock()

ret is not initialized in mcr_lock() when running in platforms with
graphics IP version < 1270, this could cause drm_WARN_ON_ONCE()
to hit eventually(what just happened to me).

Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_gt_mcr.c b/drivers/gpu/drm/xe/xe_gt_mcr.c
index bb71071c3435fe0ffabe3189b6ff250717805736..7617f034087946dd8c1b4293818a079244ac8292 100644 (file)
--- a/drivers/gpu/drm/xe/xe_gt_mcr.c
+++ b/drivers/gpu/drm/xe/xe_gt_mcr.c
@@ -383,7 +383,7 @@ static bool xe_gt_mcr_get_nonterminated_steering(struct xe_gt *gt,
 static void mcr_lock(struct xe_gt *gt)
 {
        struct xe_device *xe = gt_to_xe(gt);
-       int ret;
+       int ret = 0;
 
        spin_lock(&gt->mcr_lock);