The cache attribute of the required entry has to be the same with the
existing value. After this requirement is met, the futher comparison
should be performed.
v2:
- Refine the tittle and comments. (Rodrigo)
Fixes: 4395890a4855 ("drm/i915: Introduce private PAT management")
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Ben Widawsky <benjamin.widawsky@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Signed-off-by: Zhi Wang <zhi.a.wang@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 729ebaf..37cd086 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2965,7 +2965,7 @@ static unsigned int bdw_private_pat_match(u8 src, u8 dst)
};
/* Cache attribute has to be matched. */
- if (GEN8_PPAT_GET_CA(src) == GEN8_PPAT_GET_CA(dst))
+ if (GEN8_PPAT_GET_CA(src) != GEN8_PPAT_GET_CA(dst))
return 0;
score |= CA_MATCH;
--
2.7.4
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