Hello. Alan Cox wrote:
/* Only use IORDY/NWAIT for PIO mode 3 and 4 */ if (pio_mode < 3) info->smc.nwait_mode = 0; else info->smc.nwait_mode = 3;
That is wrong.
Yeah.
Any mode for PIO2+ will use IORDY. Modes below may require it sometimes (and its a good signal check). See ata_pio_need_iordy(atadev)
For PIO3+ you wanted to say? PIO2 doesn't require IORDY (and the majority of drives report 240 ns lowest cycle time w/o IORDY which is PIO2).
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