I personally never tried a driver other than that in the defconfig, but I always
wondered why isn't there the libata PATA driver chosen. This may be the reason.

I'm interested in seeing this libata driver work though.

Regards,
Lluís.

On Wed, Apr 18, 2012 at 01:11:31PM -0400, Matt Turner wrote:
> On Fri, Apr 13, 2012 at 5:40 PM, Matt Turner <[email protected]> wrote:
> > On my Yeeloong, when I use the libata AMD PATA driver
> > (CONFIG_PATA_AMD), I see this in dmesg, and hard disk access is dog
> > slow.
> >
> > pata_amd 0000:00:0e.2: version 0.4.1
> > scsi0 : pata_amd
> > scsi1 : pata_amd
> > ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0x4c60 irq 14
> > ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0x4c68 irq 15
> > ...
> > irq 14: nobody cared (try booting with the "irqpoll" option)
> > Call Trace:
> > [<ffffffff806c0148>] dump_stack+0x8/0x40
> > [<ffffffff8027bd60>] __report_bad_irq+0x40/0x168
> > [<ffffffff8027c100>] note_interrupt+0x200/0x2c0
> > [<ffffffff802795a0>] handle_irq_event_percpu+0xe8/0x238
> > [<ffffffff8027974c>] handle_irq_event+0x5c/0xb0
> > [<ffffffff8027c5e4>] handle_level_irq+0xb4/0x1a8
> > [<ffffffff80278b7c>] generic_handle_irq+0x5c/0x78
> > [<ffffffff80206438>] do_IRQ+0x18/0x30
> > [<ffffffff80204400>] ret_from_irq+0x0/0x4
> > [<ffffffff8027f884>] rcu_idle_enter+0x44/0x60
> > [<ffffffff80206780>] cpu_idle+0x20/0x90
> > [<ffffffff808249c0>] start_kernel+0x418/0x444
> >
> > handlers:
> > [<ffffffff804fec98>] ata_bmdma_interrupt
> > Disabling IRQ #14
> >
> > I see that some kind of fix was added for the old ATA driver
> > (CONFIG_BLK_DEV_AMD74XX). Was nothing added for the new libata driver
> > as well?
> 
> Ping? Surely someone else has this problem too.
> 
> Relevant: 
> https://groups.google.com/group/loongson-dev/browse_thread/thread/01a9f83b07f5c8e6?pli=1
> 
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