diff mbox series

[v2] wifi: mt76: mt7921e: Set memory space enable in PCI_COMMAND if unset

Message ID 20230417181130.4445-1-mario.limonciello@amd.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series [v2] wifi: mt76: mt7921e: Set memory space enable in PCI_COMMAND if unset | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Mario Limonciello April 17, 2023, 6:11 p.m. UTC 
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>
---
v1->v2:
 * Pick up tag from Sean
 drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 5c23c827abe47..41be108e1d5a1 100644
--- 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_dev *pdev,
 	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_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);