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wifi: mt76: mt7996: Fix null-ptr-deref in mt7996_mmio_wed_init()

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[ Upstream commit 8f30e2b059757d8711a823e4c9c023db62a1d171 ]

devm_ioremap() returns NULL on error. Currently, mt7996_mmio_wed_init()
does not check for this case, which results in a NULL pointer
dereference.

Prevent null pointer dereference in mt7996_mmio_wed_init()

Fixes: 83eafc9251 ("wifi: mt76: mt7996: add wed tx support")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
Link: https://patch.msgid.link/20250407032349.83360-1-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 11:23:49 +08:00
committed by Greg Kroah-Hartman
parent df00f9147e
commit 1072fc0ca1
1 changed files with 3 additions and 0 deletions
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drivers/net/wireless/mediatek/mt76/mt7996/mmio.c
+3
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@@ -323,6 +323,9 @@ int mt7996_mmio_wed_init(struct mt7996_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);
if (hif2) { if (hif2) {