From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: Re: IDE driver assined IRQ for disabled IDE channel
Date: Sun, 27 Jul 2008 15:56:52 +0200
> ide_generic has no enablebits checking but 'ide_generic.probe_mask=1'
> kernel parameter can be used to limit probing to the first port only.
Ok, I understood.
> However shouldn't a designated IDE PCI host driver be used instead?
I feel drivers/ide/cs5520 is unstable with TuxOnIce. So I use ide_generic
instead of cs5520 and looked at the state
> [ if this is Cx5520 PCI IDE, the cs5520 host driver misses enablebits
> checking, untested fix attached ]
Yes, My little box has cs5520. I applied the patch, it works fine.
dmesg says:
Uniform Multi-Platform E-IDE driver
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Cyrix 5520: IDE controller (0x1078:0x0002 rev 0x00) at PCI slot 0000:00:12.0
PCI: Setting latency timer of device 0000:00:12.0 to 64
Cyrix 5520: IDE port disabled
ide0: BM-DMA at 0x5000-0x5007
Probing IDE interface ide0...
hda: IC25N030ATCS04-0, ATA DISK drive
> ide_generic has no enablebits checking but 'ide_generic.probe_mask=1'
> kernel parameter can be used to limit probing to the first port only.
Ok, I understood.
> However shouldn't a designated IDE PCI host driver be used instead?
I feel drivers/ide/cs5520 is unstable with TuxOnIce. So I use ide_generic
instead of cs5520 and looked at the state.
> > ide_probe_port() returns -ENODEV, so hwif->present clear to 0.
> > I think hwif->present mean IDE channel is exist/enabled. Doesn't mean
> > connected devices(disks, CD-ROM drives and others).
>
> It used to mean both because the port was registered only if there
> were devices connected to it but it is no longer a case (seems like
> ->present documentation in ide.h is out of date now and needs fixing).
I see too.
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