[i-g-t,1/6] lib/i915: Report unknown device as the future
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Message ID 20200710093234.1438712-1-chris@chris-wilson.co.uk
State New
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Series
  • [i-g-t,1/6] lib/i915: Report unknown device as the future
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Commit Message

Chris Wilson July 10, 2020, 9:32 a.m. UTC
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@chris-wilson.co.uk>
---
 lib/intel_device_info.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
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diff --git a/lib/intel_device_info.c b/lib/intel_device_info.c
index 21f7a9570..dfa43f490 100644
--- a/lib/intel_device_info.c
+++ b/lib/intel_device_info.c
@@ -447,11 +447,11 @@  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;
 }
 
 /**