mwl8k: Add missing check after DMA map

[ Upstream commit 50459501b9a212dbe7a673727589ee105a8a9954 ]

The DMA map functions can fail and should be tested for errors.
If the mapping fails, unmap and return an error.

Fixes: 788838ebe8a4 ("mwl8k: use pci_unmap_addr{,set}() to keep track of unmap addresses on rx")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Link: https://patch.msgid.link/20250709111339.25360-2-fourier.thomas@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c
index dd72e9f8b4079ffe0e4919319ae59861915da760..194087e6a7649d8afbed74debcd8061828470679 100644 (file)
--- a/drivers/net/wireless/marvell/mwl8k.c
+++ b/drivers/net/wireless/marvell/mwl8k.c
@@ -1220,6 +1220,10 @@ static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
 
                addr = pci_map_single(priv->pdev, skb->data,
                                      MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
+               if (dma_mapping_error(&priv->pdev->dev, addr)) {
+                       kfree_skb(skb);
+                       break;
+               }
 
                rxq->rxd_count++;
                rx = rxq->tail++;