Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759412AbcDBBJz (ORCPT ); Fri, 1 Apr 2016 21:09:55 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:54529 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757206AbcDBA5C (ORCPT ); Fri, 1 Apr 2016 20:57:02 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Dan Carpenter , "David S . Miller" , Kamal Mostafa Subject: [PATCH 3.19.y-ckt 131/170] ethernet: micrel: fix some error codes Date: Fri, 1 Apr 2016 17:53:37 -0700 Message-Id: <1459558456-24452-132-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1459558456-24452-1-git-send-email-kamal@canonical.com> References: <1459558456-24452-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.19 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2107 Lines: 62 3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Dan Carpenter commit 3af0d554c1ce11e9d0953381ff566271f9ab81a9 upstream. There were two issues here: 1) dma_mapping_error() return true/false but we want to return -ENOMEM 2) If dmaengine_prep_slave_sg() failed then "err" wasn't set but presumably that should be -ENOMEM as well. I changed the success path to "return 0;" instead of "return ret;" for clarity. Fixes: 94fe8c683cea ('ks8842: Support DMA when accessed via timberdale') Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- drivers/net/ethernet/micrel/ks8842.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c index f78909a..dc07268 100644 --- a/drivers/net/ethernet/micrel/ks8842.c +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -561,8 +561,8 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev) sg_init_table(sg, 1); sg_dma_address(sg) = dma_map_single(adapter->dev, ctl->skb->data, DMA_BUFFER_SIZE, DMA_FROM_DEVICE); - err = dma_mapping_error(adapter->dev, sg_dma_address(sg)); - if (unlikely(err)) { + if (dma_mapping_error(adapter->dev, sg_dma_address(sg))) { + err = -ENOMEM; sg_dma_address(sg) = 0; goto out; } @@ -572,8 +572,10 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev) ctl->adesc = dmaengine_prep_slave_sg(ctl->chan, sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); - if (!ctl->adesc) + if (!ctl->adesc) { + err = -ENOMEM; goto out; + } ctl->adesc->callback_param = netdev; ctl->adesc->callback = ks8842_dma_rx_cb; @@ -584,7 +586,7 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev) goto out; } - return err; + return 0; out: if (sg_dma_address(sg)) dma_unmap_single(adapter->dev, sg_dma_address(sg), -- 2.7.4