From: Felix Fietkau nbd@nbd.name
[ Upstream commit 62e04f8a31fcc375c978b7f83b4229a10c3e746d ]
If the WLAN core is still active during initialization, it might cause the MCU or DMA to hang. This can happen during soft reboot, so disable the core + clock early to avoid this issue.
Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/mediatek/mt76/mt76x2_init_common.c | 4 ++++ drivers/net/wireless/mediatek/mt76/mt76x2_pci.c | 1 + 2 files changed, 5 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_init_common.c b/drivers/net/wireless/mediatek/mt76/mt76x2_init_common.c index 324b2a4b8b67c..54a9e1dfaf7a4 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x2_init_common.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x2_init_common.c @@ -72,6 +72,9 @@ void mt76x2_reset_wlan(struct mt76x2_dev *dev, bool enable) { u32 val;
+ if (!enable) + goto out; + val = mt76_rr(dev, MT_WLAN_FUN_CTRL);
val &= ~MT_WLAN_FUN_CTRL_FRC_WL_ANT_SEL; @@ -87,6 +90,7 @@ void mt76x2_reset_wlan(struct mt76x2_dev *dev, bool enable) mt76_wr(dev, MT_WLAN_FUN_CTRL, val); udelay(20);
+out: mt76x2_set_wlan_state(dev, enable); } EXPORT_SYMBOL_GPL(mt76x2_reset_wlan); diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_pci.c b/drivers/net/wireless/mediatek/mt76/mt76x2_pci.c index e66f047ea4481..26cfda24ce085 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x2_pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x2_pci.c @@ -53,6 +53,7 @@ mt76pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) return -ENOMEM;
mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]); + mt76x2_reset_wlan(dev, false);
dev->mt76.rev = mt76_rr(dev, MT_ASIC_VERSION); dev_info(dev->mt76.dev, "ASIC revision: %08x\n", dev->mt76.rev);