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ath10k: fix dma_mapping_error() handling

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The function returns 1 when DMA mapping fails. The
driver would return bogus values and could
possibly confuse itself if DMA failed.

Fixes: 767d34fc67 ("ath10k: remove DMA mapping wrappers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2015-08-19 13:10:43 +02:00 committed by Kalle Valo
parent 503422d952
commit 5e55e3cbd1
4 changed files with 16 additions and 5 deletions
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4
drivers/net/wireless/ath/ath10k/htc.c
View file

@ -145,8 +145,10 @@ int ath10k_htc_send(struct ath10k_htc *htc,
skb_cb->eid = eid;
skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
ret = dma_mapping_error(dev, skb_cb->paddr);
if (ret)
if (ret) {
ret = -EIO;
goto err_credits;
}
sg_item.transfer_id = ep->eid;
sg_item.transfer_context = skb;

8
drivers/net/wireless/ath/ath10k/htt_tx.c
View file

@ -442,8 +442,10 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
skb_cb->paddr = dma_map_single(dev, msdu->data, msdu->len,
DMA_TO_DEVICE);
res = dma_mapping_error(dev, skb_cb->paddr);
if (res)
if (res) {
res = -EIO;
goto err_free_txdesc;
}
skb_put(txdesc, len);
cmd = (struct htt_cmd *)txdesc->data;
@ -533,8 +535,10 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
skb_cb->paddr = dma_map_single(dev, msdu->data, msdu->len,
DMA_TO_DEVICE);
res = dma_mapping_error(dev, skb_cb->paddr);
if (res)
if (res) {
res = -EIO;
goto err_free_txbuf;
}
switch (skb_cb->txmode) {
case ATH10K_HW_TXRX_RAW:

8
drivers/net/wireless/ath/ath10k/pci.c
View file

@ -1667,8 +1667,10 @@ static int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar,
req_paddr = dma_map_single(ar->dev, treq, req_len, DMA_TO_DEVICE);
ret = dma_mapping_error(ar->dev, req_paddr);
if (ret)
if (ret) {
ret = -EIO;
goto err_dma;
}
if (resp && resp_len) {
tresp = kzalloc(*resp_len, GFP_KERNEL);
@ -1680,8 +1682,10 @@ static int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar,
resp_paddr = dma_map_single(ar->dev, tresp, *resp_len,
DMA_FROM_DEVICE);
ret = dma_mapping_error(ar->dev, resp_paddr);
if (ret)
if (ret) {
ret = EIO;
goto err_req;
}
xfer.wait_for_resp = true;
xfer.resp_len = 0;

1
drivers/net/wireless/ath/ath10k/wmi.c
View file

@ -3238,6 +3238,7 @@ void ath10k_wmi_event_host_swba(struct ath10k *ar, struct sk_buff *skb)
ath10k_warn(ar, "failed to map beacon: %d\n",
ret);
dev_kfree_skb_any(bcn);
ret = -EIO;
goto skip;
}