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 <shinin...@gmail.com>
Signed-off-by: Francisco Jerez <curroje...@riseup.net>
---
drivers/gpu/drm/ttm/ttm_tt.c | 23 ++++++++++++++++-------
1 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 9c2b1cc..e2123af 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -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,
--
1.6.4.4
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