From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751912AbeCUIak (ORCPT ); Wed, 21 Mar 2018 04:30:40 -0400 Received: from fllnx209.ext.ti.com ([198.47.19.16]:50108 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751658AbeCUIai (ORCPT ); Wed, 21 Mar 2018 04:30:38 -0400 From: Peter Ujfalusi To: CC: , , , , Subject: [PATCH] dmaengine: edma: Check the memory allocation for the memcpy dma device Date: Wed, 21 Mar 2018 10:30:22 +0200 Message-ID: <20180321083022.32616-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.16.2 MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the allocation fails then disable the memcpy support. Signed-off-by: Peter Ujfalusi --- drivers/dma/edma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 5b197473106b..519e69e81fca 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -1899,6 +1899,11 @@ static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode) if (memcpy_channels) { m_ddev = devm_kzalloc(ecc->dev, sizeof(*m_ddev), GFP_KERNEL); + if (!m_ddev) { + dev_warn(ecc->dev, "memcpy is disabled due to OoM\n"); + memcpy_channels = NULL; + goto ch_setup; + } ecc->dma_memcpy = m_ddev; dma_cap_zero(m_ddev->cap_mask); @@ -1926,6 +1931,7 @@ static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode) dev_info(ecc->dev, "memcpy is disabled\n"); } +ch_setup: for (i = 0; i < ecc->num_channels; i++) { struct edma_chan *echan = &ecc->slave_chans[i]; echan->ch_num = EDMA_CTLR_CHAN(ecc->id, i); -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki