[PATCH mt76 06/15] wifi: mt76: mt7996: do not attach hif2 WED when the main WED attach failed

[Felix Fietkau <nbd@nbd.name>]

If the WED attach for the primary PCIe function fails, the probe path
still attached wed_hif2 for the secondary function, leaving the device
in an inconsistent half-WED configuration that crashes later. The hif2
call also re-enabled hwrro_mode, which the failed primary attach had
just turned off.

Skip the hif2 WED setup when the primary WED device is not active.

Fixes: 83eafc9251d6 ("wifi: mt76: mt7996: add wed tx support")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7996/mmio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c
index 0d7521d06981..ba064324a7cc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mmio.c
@@ -490,6 +490,9 @@ int mt7996_mmio_wed_init(struct mt7996_dev *dev, void *pdev_ptr,
 	if (!wed_enable)
 		return 0;
 
+	if (hif2 && !mtk_wed_device_active(&dev->mt76.mmio.wed))
+		return 0;
+
 	dev->mt76.hwrro_mode = is_mt7996(&dev->mt76) ? MT76_HWRRO_V3
 						     : MT76_HWRRO_V3_1;
 
-- 
2.53.0