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drm/i915: Return the correct score in i915_ppat_get()

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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. After this fix, the refined test case can pass.

v2:

- Refine the tittle and comments. (Rodrigo)

Fixes: 4395890a48 ("drm/i915: Introduce private PAT management")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1505741794-10593-1-git-send-email-zhi.a.wang@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Zhi Wang 2017-09-18 21:36:34 +08:00 committed by Chris Wilson
parent ee427e2595
commit 1298d51c44
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_gem_gtt.c
View file

@ -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;