netdev - [PATCH] ath10k: Correct error check of dma_map

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Date:   Thu, 10 Oct 2019 09:26:53 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Niklas Cassel <niklas.cassel@...aro.org>,
        stable@...r.kernel.org
Subject: [PATCH] ath10k: Correct error check of dma_map_single()

The return value of dma_map_single() should be checked for errors using
dma_mapping_error(), rather than testing for NULL. Correct this.

Fixes: 1807da49733e ("ath10k: wmi: add management tx by reference support over wmi")
Cc: stable@...r.kernel.org
Reported-by: Niklas Cassel <niklas.cassel@...aro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 drivers/net/wireless/ath/ath10k/mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 3d2c8fcba952..a01868938692 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -3904,7 +3904,7 @@ void ath10k_mgmt_over_wmi_tx_work(struct work_struct *work)
 			     ar->running_fw->fw_file.fw_features)) {
 			paddr = dma_map_single(ar->dev, skb->data,
 					       skb->len, DMA_TO_DEVICE);
-			if (!paddr)
+			if (dma_mapping_error(ar->dev, paddr))
 				continue;
 			ret = ath10k_wmi_mgmt_tx_send(ar, skb, paddr);
 			if (ret) {
-- 
2.23.0