From: Bjorn Andersson bjorn.andersson@linaro.org
[ Upstream commit d43810b2c1808ac865aa1a2a2c291644bf95345c ]
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: 1807da49733e ("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 Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/net/wireless/ath/ath10k/mac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 174e0ce..448e3a8 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3844,8 +3844,10 @@ 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",