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wifi: mt76: mt7915: Fix null-ptr-deref in mt7915_mmio_wed_init()

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[ Upstream commit efb95439c1477bbc955cacd0179c35e7861b437c ]

devm_ioremap() returns NULL on error. Currently, mt7915_mmio_wed_init()
does not check for this case, which results in a NULL pointer
dereference.

Prevent null pointer dereference in mt7915_mmio_wed_init().

Fixes: 4f831d18d1 ("wifi: mt76: mt7915: enable WED RX support")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
Link: https://patch.msgid.link/20250407061900.85317-1-bsdhenrymartin@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Henry Martin
2025-04-07 14:19:00 +08:00
committed by Greg Kroah-Hartman
parent 6c81f1c781
commit e9f9cef187
1 changed files with 6 additions and 0 deletions
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6
drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
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@@ -755,6 +755,9 @@ int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
wed->wlan.base = devm_ioremap(dev->mt76.dev, wed->wlan.base = devm_ioremap(dev->mt76.dev,
pci_resource_start(pci_dev, 0), pci_resource_start(pci_dev, 0),
pci_resource_len(pci_dev, 0)); pci_resource_len(pci_dev, 0));
if (!wed->wlan.base)
return -ENOMEM;
wed->wlan.phy_base = pci_resource_start(pci_dev, 0); wed->wlan.phy_base = pci_resource_start(pci_dev, 0);
wed->wlan.wpdma_int = pci_resource_start(pci_dev, 0) + wed->wlan.wpdma_int = pci_resource_start(pci_dev, 0) +
MT_INT_WED_SOURCE_CSR; MT_INT_WED_SOURCE_CSR;
@@ -782,6 +785,9 @@ int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
wed->wlan.bus_type = MTK_WED_BUS_AXI; wed->wlan.bus_type = MTK_WED_BUS_AXI;
wed->wlan.base = devm_ioremap(dev->mt76.dev, res->start, wed->wlan.base = devm_ioremap(dev->mt76.dev, res->start,
resource_size(res)); resource_size(res));
if (!wed->wlan.base)
return -ENOMEM;
wed->wlan.phy_base = res->start; wed->wlan.phy_base = res->start;
wed->wlan.wpdma_int = res->start + MT_INT_SOURCE_CSR; wed->wlan.wpdma_int = res->start + MT_INT_SOURCE_CSR;
wed->wlan.wpdma_mask = res->start + MT_INT_MASK_CSR; wed->wlan.wpdma_mask = res->start + MT_INT_MASK_CSR;