From patchwork Thu Nov 25 12:46:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Guangming.Cao" X-Patchwork-Id: 12693651 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 51C10C433EF for ; Thu, 25 Nov 2021 12:49:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=7A922x64cJO0TzGu1XI24M/kfe5U5hjGBwb3LBmv3QE=; b=xAqEuLiTKdkEX1 47WVtYHiqOtrCWXYY/2uF3wT4UOXPzFlBkI0EVFOHnRdSE+iLLkK30yNmnc4ug1UMyXADyhZXHS8B /iY6yZsCAqNAJDl08HAWVmSKAb8dY2GSSKDz5N13cUiMsbmJh5/439sw03SLTPPEhfyApNtxp7YCU LrKPrN676WdYDzja3jM6ny1rQX5FrS3DFx4mmv7YuM140Ts5ncDgfhRqSxE1mGGcSS/jt/m1OeC+i +QONx8VfpaTqZHwPp3jk8KaW3yRrJGGSiY7xgODH4t0nsOVsSRJIF9jGXjxpjw3UXf69BRdmdQeFJ QQJ6JrZAX/IrAko7Fpcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqE8p-007SjK-Qi; Thu, 25 Nov 2021 12:46:20 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqE8l-007ShP-Hh; Thu, 25 Nov 2021 12:46:17 +0000 X-UUID: 0b7910cc1ca54b798aa5fd100cb9fdc9-20211125 X-UUID: 0b7910cc1ca54b798aa5fd100cb9fdc9-20211125 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 691461901; Thu, 25 Nov 2021 05:46:11 -0700 Received: from mtkmbs10n1.mediatek.inc (172.21.101.34) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 25 Nov 2021 04:46:03 -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_K=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 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211125_044615_622133_6C730C02 X-CRM114-Status: GOOD ( 10.81 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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));