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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Claudiu Beznea <claudiu.beznea@microchip.com>,
        Harini Katakam <harini.katakam@xilinx.com>,
        Sergio Prado <sergio.prado@e-labworks.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Nicolas Ferre <nicolas.ferre@microchip.com>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.7 104/166] net: macb: fix call to pm_runtime in the suspend/resume functions
Date:   Tue, 14 Jul 2020 20:44:29 +0200
Message-Id: <20200714184120.822564844@linuxfoundation.org>
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From: Nicolas Ferre <nicolas.ferre@microchip.com>

[ Upstream commit 6c8f85cac98a4c6b767c4c4f6af7283724c32b47 ]

The calls to pm_runtime_force_suspend/resume() functions are only
relevant if the device is not configured to act as a WoL wakeup source.
Add the device_may_wakeup() test before calling them.

Fixes: 3e2a5e153906 ("net: macb: add wake-on-lan support via magic packet")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Cc: Sergio Prado <sergio.prado@e-labworks.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/cadence/macb_main.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 548815255e22b..f1f0976e7669a 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -4606,7 +4606,8 @@ static int __maybe_unused macb_suspend(struct device *dev)
 
 	if (bp->ptp_info)
 		bp->ptp_info->ptp_remove(netdev);
-	pm_runtime_force_suspend(dev);
+	if (!device_may_wakeup(dev))
+		pm_runtime_force_suspend(dev);
 
 	return 0;
 }
@@ -4621,7 +4622,8 @@ static int __maybe_unused macb_resume(struct device *dev)
 	if (!netif_running(netdev))
 		return 0;
 
-	pm_runtime_force_resume(dev);
+	if (!device_may_wakeup(dev))
+		pm_runtime_force_resume(dev);
 
 	if (bp->wol & MACB_WOL_ENABLED) {
 		macb_writel(bp, IDR, MACB_BIT(WOL));
-- 
2.25.1