From: Haibo Chen <haibo.chen@xxxxxxx>
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 <haibo.chen@xxxxxxx>
---
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);
--
2.34.1
