On 17/09/2007, Takashi Iwai <tiwai@xxxxxxx> wrote: > At Sun, 16 Sep 2007 12:12:08 +0100, > Adrian McMenamin wrote: > > > > Resending this as I typed the wrong address for alsa-devel last night. > > A general clean up as well as some changes to interrupt handling. > > > > > > > > This patch handles instability on the Dreamcast G2 bus while PIO or > > DMA is underway on the System -> AICA channel. > > > > Without the suspension of interrupts when PIO or DMA is underway the > > G2 bus is prone to timeouts leading to seemingly random crashes. This > > is particularly visible in cases such as maple bus (see > > http://lkml.org/lkml/2007/9/15/181) hotplugging but the patch is good > > for all conditions. > > Hm, it isn't optimal but if it's safe... > > BTW, what is the exat matter? > Is it race or do you have to always disable IRQ during DMA? > In the former case, spin_lock_irqsave() is basically the way to go. > I'm afraid it is a hardware bug/feature rather than a race. I'll rework and repost _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
