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Commit 1298d51c authored by Zhi Wang's avatar Zhi Wang Committed by Chris Wilson
Browse files

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



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: 4395890a ("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: default avatarZhi Wang <zhi.a.wang@intel.com>
Reviewed-by: default avatarJoonas 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: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent ee427e25

drivers/gpu/drm/i915/i915_gem_gtt.c

+1 −1
Original line number Diff line number Diff line
@@ -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;