[PATCH 15/17] media: st_rc: Don't stay on an IRQ handler forever

[sean@mess.org (Sean Young)]

On Fri, Apr 13, 2018 at 07:00:50AM -0300, Mauro Carvalho Chehab wrote:
> Yeah, we could limit it to run only 512 times (or some other reasonable
> quantity), but in order to do that, we need to be sure that, on each read(),
> the FIFO will shift - e. g. no risk of needing to do more than one read
> to get the next element. That would work if the FIFO is implemented via
> flip-flops. But if it is implemented via some slow memory, or if the
> shift logic is implemented via some software on a micro-controller, it
> may need a few interactions to get the next value.
> 
> Without knowing about the hardware implementation, I'd say that setting
> a max time for the whole FIFO interaction is safer.

Ok. If the 10ms timeout is reached, there really is a problem; should we
report an error in this case?

Thanks

Sean