Device loses its IRQ number on driver unload?

[Daniel Vetter]

On Mon, Mar 09, 2015 at 11:04:01AM +0100, Thomas Hellstrom wrote:
> Hi,
> 
> I'm not sure this started with 4.0 but when I rmmod the device driver
> like so
> rmmod vmwgfx
> 
> The device loses its IRQ line as shown in lscpi:
>    Flags: bus master, medium devsel, latency 64 <irq missing here>
> 
> and a subsequent modprobe will fail since pdev->irq is 0.
> 
> Is anyone else seeing this with other drivers?

I seen occasionally (over the past couple of kernels) random zeros in pdev
but dismissed it as broken machines or bugs in i915 (we have them ...).
Usually the box died chasing a NULL pointer from pdev. Otherwise no.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch