bcm_dma_wait_idle not exported?

[simonjhall]

Hi there,

I'm using the BCM DMA functions from inside a kernel module.
I'm having a run-time link error as it appears that bcm_dma_wait_idle symbol is not exported. All the other interesting DMA functions are. Is this by design, or is this just an omission?

If it is by design, what is the best way of waiting for a DMA to finish? (IRQ?)

Kind regards,
Simon

[popcornmix]

That's just an omission as no-one is currently using that function.
Note the comment, this busy waits, so will hog the CPU.
This really need a down_interruptable that is triggered from the end of DMA imterrupt.

[simonjhall]

Ok cool cheers.
I'd seen the comment and was wondering if it's worth sticking in a schedule() call into the busy loop? (although I head that pre-emptive kernel doesn't work)

[ghollingworth]

Assuming this is now fixed? It's been a while!