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ath10k: Correct error handling of dma_map_single()

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[ Upstream commit d43810b2c1 ]

The return value of dma_map_single() should be checked for errors using
dma_mapping_error() and the skb has been dequeued so it needs to be
freed.

This was found when enabling CONFIG_DMA_API_DEBUG and it warned about the
missing dma_mapping_error() call.

Fixes: 1807da4973 ("ath10k: wmi: add management tx by reference support over wmi")
Reported-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Bjorn Andersson
2019-10-11 11:28:17 -07:00
committed by Greg Kroah-Hartman
parent a823d762a5
commit 01792265fb
1 changed files with 3 additions and 1 deletions
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4
drivers/net/wireless/ath/ath10k/mac.c
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@@ -3903,8 +3903,10 @@ 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)) {
ieee80211_free_txskb(ar->hw, skb);
continue;
}
ret = ath10k_wmi_mgmt_tx_send(ar, skb, paddr);
if (ret) {
ath10k_warn(ar, "failed to transmit management frame by ref via WMI: %d\n",