From: Mario Limonciello <mario.limonciello@amd.com>
Date: Wed, 29 Mar 2023 14:57:58 -0500
Subject: [PATCH] wifi: mt76: mt7921e: Set memory space enable in PCI_COMMAND
 if unset
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: 09d4d6da1b65d09414e7bce61459593f3c80ead1

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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 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 5c23c827..41be108e 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);
-- 
2.35.3