From 3bc2afcba81275306adfbfca83f38a52858c5940 Mon Sep 17 00:00:00 2001 From: Haibo Chen Date: Tue, 13 Dec 2022 17:43:51 +0800 Subject: [PATCH] can: flexcan: avoid unbalanced pm_runtime_enable warning When do suspend/resume, meet the following warning message: [ 30.028336] flexcan 425b0000.can: Unbalanced pm_runtime_enable! Balance the pm_runtime_force_suspend() and pm_runtime_force_resume(). Fixes: 8cb53b485f18 ("can: flexcan: add auto stop mode for IMX93 to support wakeup") Signed-off-by: Haibo Chen Link: https://lore.kernel.org/all/20221213094351.3023858-1-haibo.chen@nxp.com Signed-off-by: Marc Kleine-Budde --- drivers/net/can/flexcan/flexcan-core.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c index 0aeff34e5ae1..6d638c93977b 100644 --- a/drivers/net/can/flexcan/flexcan-core.c +++ b/drivers/net/can/flexcan/flexcan-core.c @@ -2349,9 +2349,15 @@ static int __maybe_unused flexcan_noirq_resume(struct device *device) if (netif_running(dev)) { int err; - err = pm_runtime_force_resume(device); - if (err) - return err; + /* For the wakeup in auto stop mode, no need to gate on the + * clock here, hardware will do this automatically. + */ + if (!(device_may_wakeup(device) && + priv->devtype_data.quirks & FLEXCAN_QUIRK_AUTO_STOP_MODE)) { + err = pm_runtime_force_resume(device); + if (err) + return err; + } if (device_may_wakeup(device)) flexcan_enable_wakeup_irq(priv, false);