netdev - [PATCH 3.8 2/5 V2] rtlwifi: rtl8192ce: Fix warning for unchecked pci_map

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Message-Id: <1356626252-4058-3-git-send-email-Larry.Finger@lwfinger.net>
Date:	Thu, 27 Dec 2012 10:37:29 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	linville@...driver.com
Cc:	linux-wireless@...r.kernel.org,
	Larry Finger <Larry.Finger@...inger.net>,
	netdev@...r.kernel.org
Subject: [PATCH 3.8 2/5 V2] rtlwifi: rtl8192ce: Fix warning for unchecked pci_map_single() call

Kernel 3.8 implements checking of all DMA mapping calls and issues
a WARNING for the first it finds that is not checked.

Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
---
 drivers/net/wireless/rtlwifi/rtl8192ce/trx.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

No change for V2.

diff --git a/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c b/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
index 1734247..c31795e 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192ce/trx.c
@@ -611,8 +611,14 @@ void rtl92ce_tx_fill_desc(struct ieee80211_hw *hw,
 	dma_addr_t mapping = pci_map_single(rtlpci->pdev,
 					    skb->data, skb->len,
 					    PCI_DMA_TODEVICE);
+
 	u8 bw_40 = 0;
 
+	if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+		RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+			 "DMA mapping error");
+		return;
+	}
 	rcu_read_lock();
 	sta = get_sta(hw, mac->vif, mac->bssid);
 	if (mac->opmode == NL80211_IFTYPE_STATION) {
@@ -774,6 +780,11 @@ void rtl92ce_tx_fill_cmddesc(struct ieee80211_hw *hw,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 	__le16 fc = hdr->frame_control;
 
+	if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+		RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+			 "DMA mapping error");
+		return;
+	}
 	CLEAR_PCI_TX_DESC_CONTENT(pdesc, TX_DESC_SIZE);
 
 	if (firstseg)
-- 
1.7.10.4

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