@@ -2430,12 +2430,15 @@ int m_can_class_suspend(struct device *dev)
netif_device_detach(ndev);
/* leave the chip running with rx interrupt enabled if it is
- * used as a wake-up source.
+ * used as a wake-up source. Coalescing needs to be reset then,
+ * the timer is cancelled here, interrupts are done in resume.
*/
- if (cdev->pm_wake_source)
+ if (cdev->pm_wake_source) {
+ hrtimer_cancel(&cdev->hrtimer);
m_can_write(cdev, M_CAN_IE, IR_RF0N);
- else
+ } else {
m_can_stop(ndev);
+ }
m_can_clk_stop(cdev);
}
@@ -2465,6 +2468,13 @@ int m_can_class_resume(struct device *dev)
return ret;
if (cdev->pm_wake_source) {
+ /* Restore active interrupts but disable coalescing as
+ * we may have missed important waterlevel interrupts
+ * between suspend and resume. Timers are already
+ * stopped in suspend. Here we enable all interrupts
+ * again.
+ */
+ cdev->active_interrupts |= IR_RF0N | IR_TEFN;
m_can_write(cdev, M_CAN_IE, cdev->active_interrupts);
} else {
ret = m_can_start(ndev);