linux-kernel - [PATCH] Revert "mt76: mt7921: enable aspm by default"

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Message-Id: <20220412090415.17541-1-dev@pschenker.ch>
Date:   Tue, 12 Apr 2022 11:04:14 +0200
From:   Philippe Schenker <dev@...henker.ch>
To:     linux-wireless@...r.kernel.org, Felix Fietkau <nbd@....name>
Cc:     linux@...mhuis.info, Philippe Schenker <dev@...henker.ch>,
        "David S. Miller" <davem@...emloft.net>,
        Deren Wu <deren.wu@...iatek.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Kalle Valo <kvalo@...nel.org>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Shayne Chen <shayne.chen@...iatek.com>,
        YN Chen <YN.Chen@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org
Subject: [PATCH] Revert "mt76: mt7921: enable aspm by default"

This reverts commit bf3747ae2e25dda6a9e6c464a717c66118c588c8.

This commit introduces a regression on some systems where the kernel is
crashing in different locations after a reboot was issued.

This issue was bisected on a Thinkpad P14s Gen2 (AMD) with latest firmware.

Link: https://lore.kernel.org/linux-wireless/5077a953487275837e81bdf1808ded00b9676f9f.camel@pschenker.ch/
Signed-off-by: Philippe Schenker <dev@...henker.ch>
---

 drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 1a01d025bbe5..59f9ee089389 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -20,10 +20,6 @@ static const struct pci_device_id mt7921_pci_device_table[] = {
 	{ },
 };
 
-static bool mt7921_disable_aspm;
-module_param_named(disable_aspm, mt7921_disable_aspm, bool, 0644);
-MODULE_PARM_DESC(disable_aspm, "disable PCI ASPM support");
-
 static void
 mt7921_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
 {
@@ -280,8 +276,7 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 	if (ret)
 		goto err_free_pci_vec;
 
-	if (mt7921_disable_aspm)
-		mt76_pci_disable_aspm(pdev);
+	mt76_pci_disable_aspm(pdev);
 
 	mdev = mt76_alloc_device(&pdev->dev, sizeof(*dev), &mt7921_ops,
 				 &drv_ops);
-- 
2.35.1