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i965: Fix register write checks. 

When mapping the buffer a second time, we need to use the new pointer,
not the one from the previous mapping.  Otherwise, we will most likely
crash.

Apparently, we've just been getting lucky and getting the same
bo->virtual pointer in both cases.  libdrm probably has a hand in that.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Cc: mesa-stable@lists.freedesktop.org
This commit is contained in:
Kenneth Graunke 2014-09-29 17:00:51 -07:00
parent 7e67ea994c
commit 94841b6d5d
1 changed files with 2 additions and 0 deletions
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2
src/mesa/drivers/dri/i965/intel_extensions.c
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@ -87,6 +87,7 @@ can_do_pipelined_register_writes(struct brw_context *brw)
/* Check whether the value got written. */
drm_intel_bo_map(brw->batch.workaround_bo, false);
data = brw->batch.workaround_bo->virtual;
bool success = data[offset] == expected_value;
drm_intel_bo_unmap(brw->batch.workaround_bo);
@ -145,6 +146,7 @@ can_write_oacontrol(struct brw_context *brw)
/* Check whether the value got written. */
drm_intel_bo_map(brw->batch.workaround_bo, false);
data = brw->batch.workaround_bo->virtual;
bool success = data[offset] == expected_value;
drm_intel_bo_unmap(brw->batch.workaround_bo);