Messages in this thread Patch in this message | | | From | Mario Limonciello <> | Subject | [PATCH] wifi: mt76: mt7921e: Set memory space enable in PCI_COMMAND if unset | Date | Fri, 10 Mar 2023 11:00:02 -0600 |
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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> --- drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c index 8a53d8f286db..24a2aafa6e2a 100644 --- 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_dev *pdev, 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_dev *pdev, 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); -- 2.34.1
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