Commit 811ee9df authored by Christian König's avatar Christian König
Browse files

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: default avatarChristian König <christian.koenig@amd.com>
Reported-and-tested-by: default avatarMike Galbraith <efault@gmx.de>
Fixes: d099fc8f ("drm/ttm: new TT backend allocation pool v3")
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210210160549.1462-1-christian.koenig@amd.com
parent 1926a050

drivers/gpu/drm/ttm/ttm_pool.c

+10 −0
Original line number Diff line number Diff line
@@ -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);