The old implementation wasn't consistend on this.
But it looks like we depend on this so better bring it back.
Signed-off-by: Christian König christian.koenig@amd.com Reported-and-tested-by: Mike Galbraith efault@gmx.de Fixes: d099fc8f540a ("drm/ttm: new TT backend allocation pool v3") --- drivers/gpu/drm/ttm/ttm_pool.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index 74bf1c84b637..6e27cb1bf48b 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -33,6 +33,7 @@
#include <linux/module.h> #include <linux/dma-mapping.h> +#include <linux/highmem.h>
#ifdef CONFIG_X86 #include <asm/set_memory.h> @@ -218,6 +219,15 @@ static void ttm_pool_unmap(struct ttm_pool *pool, dma_addr_t dma_addr, /* Give pages into a specific pool_type */ static void ttm_pool_type_give(struct ttm_pool_type *pt, struct page *p) { + unsigned int i, num_pages = 1 << pt->order; + + for (i = 0; i < num_pages; ++i) { + if (PageHighMem(p)) + clear_highpage(p + i); + else + clear_page(page_address(p + i)); + } + spin_lock(&pt->lock); list_add(&p->lru, &pt->pages); spin_unlock(&pt->lock);