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Fix libata resource conflict for legacy mode

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When the libata is trying to handle legacy ide ports (0x1f0 for instance), it
doesn't take care if the resource has childs or not.
The result is that this situation :
0100-01fe : pnp 00:09
  0170-0177 : libata
  01f0-01f7 : libata

is seen as conflict, which is wrong.
The proposed fix is to detect childs and in this case, look at which child is
conflicting.

Signed-off-by: Arnaud Patard <apatard@mandriva.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Arnaud Patard 2006-09-19 00:23:52 -04:00 • committed by Jeff Garzik
parent 95064a75eb
commit cb60736b32
1 changed files with 8 additions and 2 deletions

10
drivers/scsi/libata-bmdma.c
View file

@ -1016,11 +1016,14 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
res.start = 0x1f0;
res.end = 0x1f0 + 8 - 1;
conflict = ____request_resource(&ioport_resource, &res);
while (conflict->child)
conflict = ____request_resource(conflict, &res);
if (!strcmp(conflict->name, "libata"))
legacy_mode |= (1 << 0);
else {
disable_dev_on_err = 0;
printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n");
printk(KERN_WARNING "ata: 0x1f0 IDE port busy\n" \
"ata: conflict with %s\n", conflict->name);
}
} else
legacy_mode |= (1 << 0);
@ -1030,11 +1033,14 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
res.start = 0x170;
res.end = 0x170 + 8 - 1;
conflict = ____request_resource(&ioport_resource, &res);
while (conflict->child)
conflict = ____request_resource(conflict, &res);
if (!strcmp(conflict->name, "libata"))
legacy_mode |= (1 << 1);
else {
disable_dev_on_err = 0;
printk(KERN_WARNING "ata: 0x170 IDE port busy\n");
printk(KERN_WARNING "ata: 0x170 IDE port busy\n" \
"ata: conflict with %s\n", conflict->name);
}
} else
legacy_mode |= (1 << 1);