linux-kernel - [PATCH 3.16 037/133] drm/ttm: Fix accounting error when fail to get pages for pool

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Date:   Wed, 22 Nov 2017 01:58:12 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Monk Liu" <monk.liu@....com>,
        "Alex Deucher" <alexander.deucher@....com>,
        "Christian König" <christian.koenig@....com>,
        "Xiangliang.Yu" <Xiangliang.Yu@....com>
Subject: [PATCH 3.16 037/133] drm/ttm: Fix accounting error when fail to
 get pages for pool

3.16.51-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: "Xiangliang.Yu" <Xiangliang.Yu@....com>

commit 9afae2719273fa1d406829bf3498f82dbdba71c7 upstream.

When fail to get needed page for pool, need to put allocated pages
into pool. But current code has a miscalculation of allocated pages,
correct it.

Signed-off-by: Xiangliang.Yu <Xiangliang.Yu@....com>
Reviewed-by: Christian König <christian.koenig@....com>
Reviewed-by: Monk Liu <monk.liu@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -612,7 +612,7 @@ static void ttm_page_pool_fill_locked(st
 		} else {
 			pr_err("Failed to fill pool (%p)\n", pool);
 			/* If we have any pages left put them to the pool. */
-			list_for_each_entry(p, &pool->list, lru) {
+			list_for_each_entry(p, &new_pages, lru) {
 				++cpages;
 			}
 			list_splice(&new_pages, &pool->list);