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wcn36xx: check for DMA mapping errors in wcn36xx_dxe_tx_frame()

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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>
This commit is contained in:
Daniel Mack
2018-04-03 18:51:52 +02:00
committed by Kalle Valo
parent 9c27489a34
commit 7cae35199b
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/ath/wcn36xx/dxe.c
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@@ -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;