On 04/20/2013 05:38 AM, Arnd Bergmann wrote: > On Saturday 20 April 2013, Lars-Peter Clausen wrote: >> On 04/20/2013 12:45 AM, Jon Hunter wrote: >>> I think that there is a problem here. For controllers using the >>> of_dma_simple_xlate(), this will call dma_request_channel() which also >>> uses a mutex. >> >> That would only be a problem if it'd use the same mutex. Holding two mutexes >> at >> the same time is not a problem per se. >> > > I guess Jon originlly tried it with a spinlock as the outer lock, which indeed > does not work, but the new version does not have this problem.
Yes the spinlock was a problem and hence for the put/get functions. Ok so that's fine then. Cheers Jon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/