How to control IRQ thread priority from inside the driver

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Hi,

with the rt-preempt patch the IRQs are all kernelthreads started with priority 
50. Is there a way to change this priority from inside the driver, after I 
did the request_irq() call? I need a higher priority for one interrupt source 
but I do not want to change it with chrt from userspace. It should be done 
inside the driver.

Juergen
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