From: Markus Schneider-Pargmann msp@baylibre.com
[ Upstream commit a163c5761019b94258ca655b27b46e82657fd6f5 ]
Interrupts are enabled/disabled in more places than just m_can_start() and m_can_stop(). Couple the polling timer with enabling/disabling of all interrupts to achieve equivalent behavior.
Cc: Judith Mendez jm@ti.com Fixes: b382380c0d2d ("can: m_can: Add hrtimer to generate software interrupt") Signed-off-by: Markus Schneider-Pargmann msp@baylibre.com Reviewed-by: Simon Horman horms@kernel.org Link: https://lore.kernel.org/all/20240207093220.2681425-2-msp@baylibre.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/can/m_can/m_can.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 16ecc11c7f62a..2395b1225cc8a 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -418,6 +418,13 @@ static void m_can_config_endisable(struct m_can_classdev *cdev, bool enable)
static inline void m_can_enable_all_interrupts(struct m_can_classdev *cdev) { + if (!cdev->net->irq) { + dev_dbg(cdev->dev, "Start hrtimer\n"); + hrtimer_start(&cdev->hrtimer, + ms_to_ktime(HRTIMER_POLL_INTERVAL_MS), + HRTIMER_MODE_REL_PINNED); + } + /* Only interrupt line 0 is used in this driver */ m_can_write(cdev, M_CAN_ILE, ILE_EINT0); } @@ -425,6 +432,11 @@ static inline void m_can_enable_all_interrupts(struct m_can_classdev *cdev) static inline void m_can_disable_all_interrupts(struct m_can_classdev *cdev) { m_can_write(cdev, M_CAN_ILE, 0x0); + + if (!cdev->net->irq) { + dev_dbg(cdev->dev, "Stop hrtimer\n"); + hrtimer_cancel(&cdev->hrtimer); + } }
/* Retrieve internal timestamp counter from TSCV.TSC, and shift it to 32-bit @@ -1417,12 +1429,6 @@ static int m_can_start(struct net_device *dev)
m_can_enable_all_interrupts(cdev);
- if (!dev->irq) { - dev_dbg(cdev->dev, "Start hrtimer\n"); - hrtimer_start(&cdev->hrtimer, ms_to_ktime(HRTIMER_POLL_INTERVAL_MS), - HRTIMER_MODE_REL_PINNED); - } - return 0; }
@@ -1577,11 +1583,6 @@ static void m_can_stop(struct net_device *dev) { struct m_can_classdev *cdev = netdev_priv(dev);
- if (!dev->irq) { - dev_dbg(cdev->dev, "Stop hrtimer\n"); - hrtimer_cancel(&cdev->hrtimer); - } - /* disable all interrupts */ m_can_disable_all_interrupts(cdev);