| Message ID | 20201127100301.512603-4-mkl@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 865f5b671b48d0088ce981cff1e822d9f7da441f |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | pull-request: can 2020-11-27 | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Series ignored based on subject |
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index f3fc37e96b08..c62439bdee28 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1653,7 +1653,7 @@ static int m_can_open(struct net_device *dev) INIT_WORK(&cdev->tx_work, m_can_tx_work_queue); err = request_threaded_irq(dev->irq, NULL, m_can_isr, - IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + IRQF_ONESHOT, dev->name, dev); } else { err = request_irq(dev->irq, m_can_isr, IRQF_SHARED, dev->name,
The threaded IRQ handler is used for the tcan4x5x driver only. The IRQ pin of the tcan4x5x controller is active low, so better not use IRQF_TRIGGER_FALLING when requesting the IRQ. As this can result in missing interrupts. Further, if the device tree specified the interrupt as "IRQ_TYPE_LEVEL_LOW", unloading and reloading of the driver results in the following error during ifup: | irq: type mismatch, failed to map hwirq-31 for gpio@20a8000! | tcan4x5x spi1.1: m_can device registered (irq=0, version=32) | tcan4x5x spi1.1 can2: TCAN4X5X successfully initialized. | tcan4x5x spi1.1 can2: failed to request interrupt This patch fixes the problem by removing the IRQF_TRIGGER_FALLING from the request_threaded_irq(). Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework") Cc: Dan Murphy <dmurphy@ti.com> Cc: Sriram Dash <sriram.dash@samsung.com> Cc: Pankaj Sharma <pankj.sharma@samsung.com> Link: https://lore.kernel.org/r/20201127093548.509253-1-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> --- drivers/net/can/m_can/m_can.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)