On Fri, Jan 25, 2013 at 11:07 AM, Viresh Kumar <viresh.ku...@linaro.org> wrote: > On 25 January 2013 14:34, Andy Shevchenko <andy.shevche...@gmail.com> wrote: >> Okay, we have to have a protection here because get_sent reads two >> registers consequentially. This means we could end up with scenario >> with threads 1 and 2 >> >> 1. read ctlhi >> 2. write ctlhi >> 2. write ctllo >> 1. read ctllo > > Who is going to right on ctlhi/lo?
dwc_do_single_block() > we write to ctlhi/lo only when we program new > transfer. and that is not going to happen while we are in middle of a > transfer. We have got a tasklet running inside tx_status call. Isn't possible? tasklet runs scan_descriptors, that continues transfer in soft LLP mode. -- With Best Regards, Andy Shevchenko -- 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/
