wcn36xx: check for DMA mapping errors in wcn36xx_dxe_tx_frame()
Bail out if the mapping fails. Even though this hasn't occured during
tests, this unlikely case should still be handled.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Acked-by: Ramon Fried <rfried@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index 2c3b899..405d350 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -705,6 +705,11 @@ int wcn36xx_dxe_tx_frame(struct wcn36xx *wcn,
ctl->skb->data,
ctl->skb->len,
DMA_TO_DEVICE);
+ if (dma_mapping_error(wcn->dev, desc->src_addr_l)) {
+ dev_err(wcn->dev, "unable to DMA map src_addr_l\n");
+ ret = -ENOMEM;
+ goto unlock;
+ }
desc->dst_addr_l = ch->dxe_wq;
desc->fr_len = ctl->skb->len;