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drm/ttm: fix two bugs in new placement routines. 

a) the loops were going to <= not <, leading to illegal memory access
b) the busy placement checks were using the placement arrays not the
   busy placement ones.

Acked-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2009-12-14 14:51:35 +10:00
parent b8ff7357da
commit b663752627
1 changed files with 5 additions and 5 deletions
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10
drivers/gpu/drm/ttm/ttm_bo.c
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@ -849,7 +849,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
int i, ret;
mem->mm_node = NULL;
for (i = 0; i <= placement->num_placement; ++i) {
for (i = 0; i < placement->num_placement; ++i) {
ret = ttm_mem_type_from_flags(placement->placement[i],
&mem_type);
if (ret)
@ -900,8 +900,8 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
if (!type_found)
return -EINVAL;
for (i = 0; i <= placement->num_busy_placement; ++i) {
ret = ttm_mem_type_from_flags(placement->placement[i],
for (i = 0; i < placement->num_busy_placement; ++i) {
ret = ttm_mem_type_from_flags(placement->busy_placement[i],
&mem_type);
if (ret)
return ret;
@ -911,7 +911,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
if (!ttm_bo_mt_compatible(man,
bo->type == ttm_bo_type_user,
mem_type,
placement->placement[i],
placement->busy_placement[i],
&cur_flags))
continue;
@ -921,7 +921,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
* Use the access and other non-mapping-related flag bits from
* the memory placement flags to the current flags
*/
ttm_flag_masked(&cur_flags, placement->placement[i],
ttm_flag_masked(&cur_flags, placement->busy_placement[i],
~TTM_PL_MASK_MEMTYPE);
ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem,