linux-kernel - [PATCH v4 5/5] net: macb: fix call to pm_runtime in the suspend/resume functions

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Message-ID: <c7c517840ce8c166c83f45e66169e40c1614323f.1588763703.git.nicolas.ferre@microchip.com>
Date:   Wed, 6 May 2020 13:37:41 +0200
From:   <nicolas.ferre@...rochip.com>
To:     <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
        "Claudiu Beznea" <claudiu.beznea@...rochip.com>,
        <harini.katakam@...inx.com>
CC:     <linux-kernel@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        <antoine.tenart@...tlin.com>, <f.fainelli@...il.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Sergio Prado <sergio.prado@...abworks.com>
Subject: [PATCH v4 5/5] net: macb: fix call to pm_runtime in the suspend/resume functions

From: Nicolas Ferre <nicolas.ferre@...rochip.com>

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")
Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Cc: Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc: Harini Katakam <harini.katakam@...inx.com>
Cc: Sergio Prado <sergio.prado@...abworks.com>
---
Changes in v3:
 - remove the parenthesis around device_may_wakeup()
Changes in v2:
- new in v2 serries

 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 ebc57cd5d286..f01b9831b219 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -4564,7 +4564,8 @@ 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;
 }
@@ -4579,7 +4580,8 @@ 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));
-- 
2.26.2