linux-kernel - [PATCH 5.15 016/201] Revert "mt76: mt7921: Fix the error handling path of mt7921_pci

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Message-Id: <20220727161027.585937125@linuxfoundation.org>
Date:   Wed, 27 Jul 2022 18:08:40 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-wireless@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Sean Wang" <sean.wang@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>
Subject: [PATCH 5.15 016/201] Revert "mt76: mt7921: Fix the error handling path of mt7921_pci_probe()"

From: Sean Wang <sean.wang@...iatek.com>

This reverts commit 663457f421d41e9d2fcb1e84baf43d1433f80c08 that is the
commit 44c4237cf3436bda2b185ff728123651ad133f69 upstream.

Because there was mistake in
'649178c0493e ("mt76: mt7921e: fix possible probe failure after reboot")'
that caused WiFi reset cannot work well as the reported issue
"PROBLEM: [Stable v5.15.42+] [mt7921] Wake after suspend locks up system
when mt7921-driver is used on a Lenovo ThinkPad E15 G3" described in
http://lists.infradead.org/pipermail/linux-mediatek/2022-June/042668.html
So we need to revert the patch first to avoid the conflict of reverting
'649178c0493e ("mt76: mt7921e: fix possible probe failure after reboot")'
and will be applied back later after fixing.

Signed-off-by: Sean Wang <sean.wang@...iatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wireless/mediatek/mt76/mt7921/pci.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -254,10 +254,8 @@ static int mt7921_pci_probe(struct pci_d
 	dev->bus_ops = dev->mt76.bus;
 	bus_ops = devm_kmemdup(dev->mt76.dev, dev->bus_ops, sizeof(*bus_ops),
 			       GFP_KERNEL);
-	if (!bus_ops) {
-		ret = -ENOMEM;
-		goto err_free_dev;
-	}
+	if (!bus_ops)
+		return -ENOMEM;

 	bus_ops->rr = mt7921_rr;
 	bus_ops->wr = mt7921_wr;
@@ -266,7 +264,7 @@ static int mt7921_pci_probe(struct pci_d

 	ret = __mt7921_mcu_drv_pmctrl(dev);
 	if (ret)
-		goto err_free_dev;
+		return ret;

 	mdev->rev = (mt7921_l1_rr(dev, MT_HW_CHIPID) << 16) |
 		    (mt7921_l1_rr(dev, MT_HW_REV) & 0xff);