From: Mario Limonciello mario.limonciello@amd.com
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@amd.com Signed-off-by: Mario Limonciello mario.limonciello@amd.com Acked-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -256,6 +256,7 @@ static int mt7921_pci_probe(struct pci_d struct mt7921_dev *dev; struct mt76_dev *mdev; int ret; + u16 cmd;
ret = pcim_enable_device(pdev); if (ret) @@ -265,6 +266,11 @@ 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);