Hi.
In kernel 2.6.26, I disable the secoundary IDE via BIOS. But kernel assigned IRQ to secondary IDE.
I saw /proc/interrupts:
- /proc/interrupts of 2.6.25
CPU0
0: 232213 XT-PIC-XT timer
1: 388 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
3: 1 XT-PIC-XT
4: 305 XT-PIC-XT
5: 1 XT-PIC-XT
7: 1 XT-PIC-XT
8: 0 XT-PIC-XT rtc0
9: 1 XT-PIC-XT
10: 1 XT-PIC-XT
11: 1 XT-PIC-XT
12: 110 XT-PIC-XT i8042
14: 5640 XT-PIC-XT ide0
15: 35 XT-PIC-XT yenta, ohci_hcd:usb1
NMI: 0 Non-maskable interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 0
IRQ15 doesn't assigned for ide1.
- /proc/interrupts of 2.6.26
CPU0
0: 213884 XT-PIC-XT timer
1: 197 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
3: 1 XT-PIC-XT
4: 309 XT-PIC-XT
5: 1 XT-PIC-XT
7: 2 XT-PIC-XT
8: 0 XT-PIC-XT rtc0
9: 1 XT-PIC-XT
10: 1 XT-PIC-XT
11: 1 XT-PIC-XT
12: 110 XT-PIC-XT i8042
14: 5621 XT-PIC-XT ide0
15: 0 XT-PIC-XT ide1
NMI: 0 Non-maskable interrupts
TRM: 0 Thermal event interrupts
SPU: 0 Spurious interrupts
ERR: 1
However, kernel 2.6.26 assinged IRQ15 for ide1. And yenta and ohci
(USB host controller) couldn't assign an IRQ.
dmesg are:
Yenta: CardBus bridge found at 0000:00:01.0 [0000:0000]
Yenta: no PCI IRQ, CardBus support disabled for this socket.
Yenta: check your BIOS CardBus, BIOS IRQ or ACPI settings.
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
ohci_hcd 0000:00:13.0: OHCI Host Controller
ohci_hcd 0000:00:13.0: new USB bus registered, assigned bus number 1
ohci_hcd 0000:00:13.0: request interrupt 15 failed
ohci_hcd 0000:00:13.0: USB bus 1 deregistered
ohci_hcd 0000:00:13.0: init 0000:00:13.0 fail, -16
ohci_hcd: probe of 0000:00:13.0 failed with error -16
Signed-off-by: TAKADA Yoshihito <takada@xxxxxxxxxxxxx>
diff -Narup a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
--- a/drivers/ide/ide-probe.c 2008-07-25 13:21:37.000000000 +0900
+++ b/drivers/ide/ide-probe.c 2008-07-25 13:42:38.000000000 +0900
@@ -1546,6 +1546,8 @@ int ide_device_add_all(u8 *idx, const st
continue;
hwif = &ide_hwifs[idx[i]];
+ if (!hwif->present)
+ continue;
if (hwif_init(hwif) == 0) {
printk(KERN_INFO "%s: failed to initialize IDE "
@@ -1582,12 +1584,11 @@ int ide_device_add_all(u8 *idx, const st
continue;
hwif = &ide_hwifs[idx[i]];
-
- ide_sysfs_register_port(hwif);
- ide_proc_register_port(hwif);
-
- if (hwif->present)
+ if (hwif->present) {
+ ide_sysfs_register_port(hwif);
+ ide_proc_register_port(hwif);
ide_proc_port_register_devices(hwif);
+ }
}
return rc;
--
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