From: Mario Limonciello <mario.limonciello@xxxxxxx>
commit 09d4d6da1b65d09414e7bce61459593f3c80ead1 upstream.
When the BIOS has been configured for Fast Boot, systems with mt7921e
have non-functional wifi. Turning on Fast boot caused both bus master
enable and memory space enable bits in PCI_COMMAND not to get configured.
The mt7921 driver already sets bus master enable, but explicitly check
and set memory access enable as well to fix this problem.
Tested-by: Anson Tsao <anson.tsao@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Acked-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -263,6 +263,7 @@ static int mt7921_pci_probe(struct pci_d
struct mt76_dev *mdev;
u8 features;
int ret;
+ u16 cmd;
ret = pcim_enable_device(pdev);
if (ret)
@@ -272,6 +273,11 @@ static int mt7921_pci_probe(struct pci_d
if (ret)
return ret;
+ pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+ if (!(cmd & PCI_COMMAND_MEMORY)) {
+ cmd |= PCI_COMMAND_MEMORY;
+ pci_write_config_word(pdev, PCI_COMMAND, cmd);
+ }
pci_set_master(pdev);
ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
