From: Alan Two fixes in this test patch. One of them allows old CF cards to refuse pio mode setting, and one to wait for the drive to settle after a set features changes the speed settings, which is based upon the workarounds used by drivers/ide. Please test and report back if you have an afflicted system. This patch isn't for merging just testing. The CF card fix will still display errors when the card works (got fixes for that once I know the cure works) but should then be found/usable. Not signed off by anyone, not for merging Signed-off-by: Andrew Morton --- drivers/ata/libata-core.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff -puN drivers/ata/libata-core.c~libata-fix-hopefully-all-the-remaining-problems-with drivers/ata/libata-core.c --- a/drivers/ata/libata-core.c~libata-fix-hopefully-all-the-remaining-problems-with +++ a/drivers/ata/libata-core.c @@ -5766,6 +5766,7 @@ inline unsigned int ata_host_intr (struc { struct ata_eh_info *ehi = &ap->link.eh_info; u8 status, host_stat = 0; + int i; VPRINTK("ata%u: protocol %d task_state %d\n", ap->print_id, qc->tf.protocol, ap->hsm_task_state); @@ -5822,6 +5823,20 @@ inline unsigned int ata_host_intr (struc if (unlikely(status & ATA_BUSY)) goto idle_irq; + if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && + qc->tf.feature == SETFEATURES_XFER)) { + /* Let the timings change settle and the drive catch up as + some hardware needs up to 10uS to get its brain back in + gear. Taken from the workarounds in drivers/ide done by + Matthew Faupel/Niccolo Rigacci */ + for (i = 0; i < 10; i++) { + if ((status & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == 0) + break; + udelay(1); + status = ata_chk_status(ap); + } + } + /* ack bmdma irq events */ ap->ops->irq_clear(ap); _