| Message ID | 20191011182817.194565-1-bjorn.andersson@linaro.org |
|---|---|
| State | Accepted |
| Commit | d43810b2c1808ac865aa1a2a2c291644bf95345c |
| Headers | show |
| Series | [v2] ath10k: Correct error handling of dma_map_single() | expand |
Bjorn Andersson <bjorn.andersson@linaro.org> wrote: > 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> Patch applied to ath-next branch of ath.git, thanks. d43810b2c180 ath10k: Correct error handling of dma_map_single() -- https://patchwork.kernel.org/patch/11186173/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 3d2c8fcba952..e8bdb2ba9b18 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -3904,8 +3904,10 @@ 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",
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. 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> --- Changes since v1: - Free the dequeued skb drivers/net/wireless/ath/ath10k/mac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.23.0