accessing the videobuffer in IRQ handler

[Gabor Kerenyi <wom@xxxxxxxxxxx>]

Hi!

I'm trying to access the captured picture in the IRQ handler
(bttv_irq_switch_field) using the mmapped method.
I thought the capture->vb.dma.vmalloc should point to the
picture but it's NULL.
The capture->bottom.dma is not NULL but I can't access
it when dereferencing the pointer.

Any idea?

Thanks,

gabor