On Tue, Dec 02, 2014 at 09:51:01AM +0000, Terje Frøysa wrote:
> Well, the code:
> DEBUG_PRINT(KERN_DEBUG "RTDM IMU %d - enable IRQ\n", info->gpio_pin_n);
> err = rtdm_irq_enable(&info->gpio_irq);
> only exists one place in the driver and is only executed in the
> kernel-context of rt_dev_open() from user-space.
> The irq-device is opened only once before entering the read-loop.
>
> The repeated read calls from the user space (rt_dev_read()) only blocs on the
> irq semaphore and copies the irq-time back to the user.
> I don't see how the irq-line can be re-enabled by this code.
> If the device have been repeatedly opened, the dmesg would have been flooded
> with log-messages.
What flags do you pass to rtdm_irq_request?
--
Gilles.
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