From 09d4d6da1b65d09414e7bce61459593f3c80ead1 Mon Sep 17 00:00:00 2001
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
Git-commit: 09d4d6da1b65d09414e7bce61459593f3c80ead1
Patch-mainline: v6.4-rc1
References: git-fixes

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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
@@ -218,6 +218,7 @@ 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)
@@ -227,6 +228,11 @@ 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);