> > + if (ata_pio_need_iordy(adev) || use_mwdma) > > control |= 2; /* IE enable */ > > Why IORDY is enabled for MWDMA has always been beyond me... I understand > that the stupid Intel docs are to be blamed here. I fail to see whats stupid about the docs ? The same timing register set is used for MWDMA and PIO cycles in MWDMA tuned modes (eg ATAPI). Thus the controller needs to be in an MWDMA mode whose timings are compatible with the PIO timing and we want IORDY in use for the PIO transfer parts. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
