[PATCH][V2] drm/i915/guc: fix GEM_BUG_ON check

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

The check for level being less than zero always false because flags
is currently unsigned and can never be negative. Fix this by making
flags a s32.

Detected by CoverityScan, CID#1468363 ("Macro compares unsigned to 0")

Signed-off-by: Colin Ian King <colin.king at canonical.com>

---
V2: Make flags s32 rather than remove the GEM_BUG_ON check, thanks to
Ville Syrjälä for spotting the mistake in my first attempt.
---
 drivers/gpu/drm/i915/intel_guc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 116f4ccf1bbd..fb31f5004bcf 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -206,7 +206,7 @@ void intel_guc_fini(struct intel_guc *guc)
 static u32 get_log_control_flags(void)
 {
 	u32 level = i915_modparams.guc_log_level;
-	u32 flags = 0;
+	s32 flags = 0;
 
 	GEM_BUG_ON(level < 0);
 
-- 
2.17.0