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can: m_can: Start/Cancel polling timer together with interrupts

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[ 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>
This commit is contained in:
Markus Schneider-Pargmann 2024-02-07 10:32:07 +01:00 committed by Sasha Levin
parent 248ebf21e8
commit 887407b622
1 changed files with 12 additions and 11 deletions
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23
drivers/net/can/m_can/m_can.c
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@ -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);