[igt-dev] [PATCH i-g-t 2/4] lib/i915: Report unknown device as the future

[Chris Wilson]

Since we likely know all the old devices, an unknown device is most
likely a future device, so use -1u instead of 0 for its generation.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/intel_device_info.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/intel_device_info.c b/lib/intel_device_info.c
index 6c9ac388c..eee7cac94 100644
--- a/lib/intel_device_info.c
+++ b/lib/intel_device_info.c
@@ -454,11 +454,11 @@ out:
  * Computes the Intel GFX generation for the given device id.
  *
  * Returns:
- * The GFX generation on successful lookup, 0 on failure.
+ * The GFX generation on successful lookup, -1u on failure.
  */
 unsigned intel_gen(uint16_t devid)
 {
-	return ffs(intel_get_device_info(devid)->gen);
+	return ffs(intel_get_device_info(devid)->gen) ?: -1u;
 }
 
 /**
-- 
2.28.0.rc1