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drm/ttm: Avoid conflicting reserve_memtype during ttm_tt_set_page_caching.

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Fixes errors like:
> reserve_ram_pages_type failed 0x15b7a000-0x15b7b000, track 0x8, req 0x10
when a BO is moved between WC and UC areas.

Reported-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Acked-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Francisco Jerez 2010-01-12 18:49:43 +01:00 committed by Dave Airlie
parent f28cf33945
commit db78e27de7
1 changed files with 16 additions and 7 deletions
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23
drivers/gpu/drm/ttm/ttm_tt.c
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@ -198,17 +198,26 @@ EXPORT_SYMBOL(ttm_tt_populate);
static inline int ttm_tt_set_page_caching(struct page *p,
enum ttm_caching_state c_state)
{
int ret = 0;
if (PageHighMem(p))
return 0;
switch (c_state) {
case tt_cached:
return set_pages_wb(p, 1);
case tt_wc:
return set_memory_wc((unsigned long) page_address(p), 1);
default:
return set_pages_uc(p, 1);
if (get_page_memtype(p) != -1) {
/* p isn't in the default caching state, set it to
* writeback first to free its current memtype. */
ret = set_pages_wb(p, 1);
if (ret)
return ret;
}
if (c_state == tt_wc)
ret = set_memory_wc((unsigned long) page_address(p), 1);
else if (c_state == tt_uncached)
ret = set_pages_uc(p, 1);
return ret;
}
#else /* CONFIG_X86 */
static inline int ttm_tt_set_page_caching(struct page *p,