From patchwork Thu Mar 10 04:59:44 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Hui X-Patchwork-Id: 483 Return-Path: Delivered-To: unknown Received: from imap.gmail.com (74.125.159.109) by localhost6.localdomain6 with IMAP4-SSL; 08 Jun 2011 14:43:02 -0000 Delivered-To: patches@linaro.org Received: by 10.224.67.207 with SMTP id s15cs5808qai; Wed, 9 Mar 2011 21:00:44 -0800 (PST) Received: by 10.43.60.200 with SMTP id wt8mr835692icb.358.1299733243592; Wed, 09 Mar 2011 21:00:43 -0800 (PST) Received: from mail-iw0-f178.google.com (mail-iw0-f178.google.com [209.85.214.178]) by mx.google.com with ESMTPS id gw41si6581169ibb.30.2011.03.09.21.00.43 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 09 Mar 2011 21:00:43 -0800 (PST) Received-SPF: neutral (google.com: 209.85.214.178 is neither permitted nor denied by best guess record for domain of jason.hui@linaro.org) client-ip=209.85.214.178; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.214.178 is neither permitted nor denied by best guess record for domain of jason.hui@linaro.org) smtp.mail=jason.hui@linaro.org Received: by mail-iw0-f178.google.com with SMTP id 9so1525758iwn.37 for ; Wed, 09 Mar 2011 21:00:43 -0800 (PST) Received: by 10.43.69.74 with SMTP id yb10mr3638659icb.78.1299733243149; Wed, 09 Mar 2011 21:00:43 -0800 (PST) Received: from localhost.localdomain ([116.231.118.83]) by mx.google.com with ESMTPS id vm9sm1910663icb.0.2011.03.09.21.00.38 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 09 Mar 2011 21:00:42 -0800 (PST) From: Jason Liu To: devicetree-discuss@lists.ozlabs.org Cc: linaro-dev@lists.linaro.org, patches@linaro.org, grant.likely@linaro.org Subject: [PATCH V4 4/5] net/fec: check id_entry pointer before using it Date: Thu, 10 Mar 2011 12:59:44 +0800 Message-Id: <1299733185-2172-5-git-send-email-jason.hui@linaro.org> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1299733185-2172-1-git-send-email-jason.hui@linaro.org> References: <1299733185-2172-1-git-send-email-jason.hui@linaro.org> The id_entry will possibly be NULL, So, need check id_entry and make sure it not NULL before using it. Signed-off-by: Jason Liu Signed-off-by: Jason Liu Acked-by: Grant Likely --- drivers/net/fec.c | 12 ++++++------ 1 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 2a71373..02cdd71 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -293,7 +293,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev) * the system that it's running on. As the result, driver has to * swap every frame going to and coming from the controller. */ - if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) + if (id_entry && id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) swap_buffer(bufaddr, skb->len); /* Save skb pointer */ @@ -529,7 +529,7 @@ fec_enet_rx(struct net_device *dev) dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen, DMA_FROM_DEVICE); - if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) + if (id_entry && id_entry->driver_data & FEC_QUIRK_SWAP_FRAME) swap_buffer(data, pkt_len); /* This does 16 byte alignment, exactly what we need. @@ -808,7 +808,7 @@ static int fec_enet_mii_init(struct platform_device *pdev) * mdio interface in board design, and need to be configured by * fec0 mii_bus. */ - if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && pdev->id) { + if (id_entry && (id_entry->driver_data & FEC_QUIRK_ENET_MAC) && pdev->id) { /* fec1 uses fec0 mii_bus */ fep->mii_bus = fec0_mii_bus; return 0; @@ -851,7 +851,7 @@ static int fec_enet_mii_init(struct platform_device *pdev) goto err_out_free_mdio_irq; /* save fec0 mii_bus */ - if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) + if (id_entry && id_entry->driver_data & FEC_QUIRK_ENET_MAC) fec0_mii_bus = fep->mii_bus; return 0; @@ -1238,7 +1238,7 @@ fec_restart(struct net_device *dev, int duplex) * enet-mac reset will reset mac address registers too, * so need to reconfigure it. */ - if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { + if (id_entry && id_entry->driver_data & FEC_QUIRK_ENET_MAC) { memcpy(&temp_mac, dev->dev_addr, ETH_ALEN); writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW); writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH); @@ -1294,7 +1294,7 @@ fec_restart(struct net_device *dev, int duplex) * The phy interface and speed need to get configured * differently on enet-mac. */ - if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) { + if (id_entry && id_entry->driver_data & FEC_QUIRK_ENET_MAC) { val = readl(fep->hwp + FEC_R_CNTRL); /* MII or RMII */