Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45FC5C433EF for ; Thu, 25 Nov 2021 12:48:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351667AbhKYMvU (ORCPT ); Thu, 25 Nov 2021 07:51:20 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:51046 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1351677AbhKYMtQ (ORCPT ); Thu, 25 Nov 2021 07:49:16 -0500 X-UUID: 75f10dd670fb429baf2bb440d7820701-20211125 X-UUID: 75f10dd670fb429baf2bb440d7820701-20211125 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 43782738; Thu, 25 Nov 2021 20:46:03 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Thu, 25 Nov 2021 20:46:02 +0800 Received: from mszswglt01.gcn.mediatek.inc (10.16.20.20) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 25 Nov 2021 20:46:01 +0800 From: To: Sumit Semwal , Benjamin Gaignard , Liam Mark , "Laura Abbott" , Brian Starkey , "John Stultz" , =?UTF-8?q?Christian=20K=C3=B6nig?= , Matthias Brugger , "open list:DMA-BUF HEAPS FRAMEWORK" , "open list:DMA-BUF HEAPS FRAMEWORK" , "moderated list:DMA-BUF HEAPS FRAMEWORK" , open list , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" CC: , Guangming Subject: [PATCH] dma_heap: use sg_table.orig_nents in sg_table release flow Date: Thu, 25 Nov 2021 20:46:25 +0800 Message-ID: <20211125124626.60068-1-guangming.cao@mediatek.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guangming Use (sg_table.orig_nents) rather than (sg_table.nents) to traverse sg_table to free sg_table. Use (sg_table.nents) maybe will casuse some pages can't be freed. Signed-off-by: Guangming --- drivers/dma-buf/heaps/system_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c index 23a7e74ef966..ce10d4eb674c 100644 --- a/drivers/dma-buf/heaps/system_heap.c +++ b/drivers/dma-buf/heaps/system_heap.c @@ -289,7 +289,7 @@ static void system_heap_dma_buf_release(struct dma_buf *dmabuf) int i; table = &buffer->sg_table; - for_each_sg(table->sgl, sg, table->nents, i) { + for_each_sg(table->sgl, sg, table->orig_nents, i) { struct page *page = sg_page(sg); __free_pages(page, compound_order(page)); -- 2.17.1