From: Dmitry Antipov <dmantipov@yandex.ru>
Date: Fri, 1 Sep 2023 08:19:04 +0000 (+0300)
Subject: wifi: mt76: add DMA mapping error check in mt76_alloc_txwi()
X-Git-Tag: io_uring-6.7-2023-11-10~40^2~118^2~38^2~49
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5d0e7dde4a688948e701939bc7d3fe9adf8786c5;p=linux-block.git

wifi: mt76: add DMA mapping error check in mt76_alloc_txwi()

Add 'dma_mapping_error()' check in 'mt76_alloc_txwi()'.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c
index 6a6af1d3d687..643e18ebb5ee 100644
--- a/drivers/net/wireless/mediatek/mt76/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/dma.c
@@ -53,6 +53,11 @@ mt76_alloc_txwi(struct mt76_dev *dev)
 
 	addr = dma_map_single(dev->dma_dev, txwi, dev->drv->txwi_size,
 			      DMA_TO_DEVICE);
+	if (unlikely(dma_mapping_error(dev->dma_dev, addr))) {
+		kfree(txwi);
+		return NULL;
+	}
+
 	t = (struct mt76_txwi_cache *)(txwi + dev->drv->txwi_size);
 	t->dma_addr = addr;