diff options
| author | Christian König | 2021-02-10 14:24:27 +0100 |
|---|---|---|
| committer | Christian König | 2021-02-11 09:35:19 +0100 |
| commit | 811ee9dff58072742644da2c07641728f5e078e4 (patch) | |
| tree | 0289f4b7a313e23113b5729bcbcf792afd5ab5a2 /drivers/gpu | |
| parent | 1926a0508d8947cf081280d85ff035300dc71da7 (diff) | |
drm/ttm: make sure pool pages are cleared
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")
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210210160549.1462-1-christian.koenig@amd.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_pool.c | 10 |
1 files changed, 10 insertions, 0 deletions
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); |