From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754881AbcAXT0Z (ORCPT ); Sun, 24 Jan 2016 14:26:25 -0500 Received: from unicorn.mansr.com ([81.2.72.234]:59309 "EHLO unicorn.mansr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754812AbcAXT0U (ORCPT ); Sun, 24 Jan 2016 14:26:20 -0500 From: Mans Rullgard To: Viresh Kumar , Andy Shevchenko , Vinod Koul , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Cc: Dan Williams Subject: [PATCH 15/15] dmaengine: dw: set cdesc to NULL when free cyclic transfers Date: Sun, 24 Jan 2016 19:22:02 +0000 Message-Id: <1453663322-14474-16-git-send-email-mans@mansr.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1453663322-14474-1-git-send-email-mans@mansr.com> References: <1453663322-14474-1-git-send-email-mans@mansr.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andy Shevchenko To be sure we have the cyclic transfers already gone we set cdesc to NULL. It will prevent the double free. Signed-off-by: Andy Shevchenko Signed-off-by: Mans Rullgard --- drivers/dma/dw/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index b6634adf24f9..5606deb7f060 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -1480,6 +1480,8 @@ void dw_dma_cyclic_free(struct dma_chan *chan) kfree(cdesc->desc); kfree(cdesc); + dwc->cdesc = NULL; + clear_bit(DW_DMA_IS_CYCLIC, &dwc->flags); } EXPORT_SYMBOL(dw_dma_cyclic_free); -- 2.7.0