Olaf Hering wrote:

quoted

The printk in pci_request_region has 'bar + 1', so 6 should be possible
if i becomes 5.

Does the IO region of the last bar look correct?

    I'd say it looks suspicious since it's not adjacent to all the other 
regions... In fact, after looking at your /proc/ioports/ I can say that the 
BAR is actually unassigned and its *actual* value is 0 which the driver may 
not like (the ones that lspci show are the physical memory addresses not the 
actual I/O space addresses in this case). That's why the reservation fails.

00:03.1 IDE interface: Symphony Labs SL82c105 (rev 05) (prog-if 8f [Master SecP SecO PriP PriO])
	Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Interrupt: pin A routed to IRQ 86
	Region 0: I/O ports at 3fd3000f000 [size=8]
	Region 1: I/O ports at 3fd3000f010 [size=4]
	Region 2: I/O ports at 3fd3000f020 [size=8]
	Region 3: I/O ports at 3fd3000f030 [size=4]
	Region 4: I/O ports at 3fd3000f040 [size=16]
	Region 5: I/O ports at 3fd30000000 [size=16]
00: ad 10 05 01 41 01 80 02 05 8f 01 01 08 48 80 00
10: 01 f0 00 00 11 f0 00 00 21 f0 00 00 31 f0 00 00
20: 41 f0 00 00 01 00 00 00 00 00 00 00 00 00 00 00

    Well, BAR5 is indeed 0.

30: 00 00 00 00 00 00 00 00 00 00 00 00 56 01 02 28
40: b3 08 ff 00 09 09 00 00 09 09 00 00 09 09 00 00
50: 09 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 00 00 00 00 ff 00 00 00
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

name             "ide"
linux,phandle    00d5cdc0 (14011840)
assigned-addresses 81001910 00000000 0000f000 00000000 00000008 81001914
		 00000000 0000f010 00000000 00000004 81001918 00000000
		 0000f020 00000000 00000008 8100191c 00000000 0000f030
		 00000000 00000004 81001920 00000000 0000f040 00000000
		 00000010 81001924 00000000 00000000 00000000 00000010

    Yeah, the device tree has 0 for BAR5 too...

WBR, Sergei