The original use of struct m_can_classdev::hrtimer was to support polling
for devices without IRQ, with the timer function called hrtimer_callback().

Commit 07f25091ca02 ("can: m_can: Implement receive coalescing") uses the
hrtimer for software-supported IRQ coalescence, with the timer function
called m_can_coalescing_timer().

To improve the readability of the driver, rename hrtimer_callback() to
m_can_polling_timer(), which better describes the functionality.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/m_can/m_can.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 03e2c431ffab..d4aa46b236ea 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -2045,7 +2045,7 @@ static netdev_tx_t m_can_start_xmit(struct sk_buff *skb,
 	return ret;
 }
 
-static enum hrtimer_restart hrtimer_callback(struct hrtimer *timer)
+static enum hrtimer_restart m_can_polling_timer(struct hrtimer *timer)
 {
 	struct m_can_classdev *cdev = container_of(timer, struct
 						   m_can_classdev, hrtimer);
@@ -2418,7 +2418,7 @@ int m_can_class_register(struct m_can_classdev *cdev)
 
 	if (!cdev->net->irq) {
 		dev_dbg(cdev->dev, "Polling enabled, initialize hrtimer");
-		hrtimer_setup(&cdev->hrtimer, &hrtimer_callback, CLOCK_MONOTONIC,
+		hrtimer_setup(&cdev->hrtimer, m_can_polling_timer, CLOCK_MONOTONIC,
 			      HRTIMER_MODE_REL_PINNED);
 	} else {
 		hrtimer_setup(&cdev->hrtimer, m_can_coalescing_timer, CLOCK_MONOTONIC,

-- 
2.51.0