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SubjectRe: [Regression] PCI resources allocation problem on HP nx6325
Hello!

On Sun, Aug 02, 2009 at 09:39:58AM -0700, Linus Torvalds wrote:
> ---
> drivers/pci/setup-res.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
> index b711fb7..1898c7b 100644
> --- a/drivers/pci/setup-res.c
> +++ b/drivers/pci/setup-res.c
> @@ -100,16 +100,16 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
> {
> struct resource *res = &dev->resource[resource];
> struct resource *root;
> - char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
> int err;
>
> root = pci_find_parent_resource(dev, res);
>
> err = -EINVAL;
> if (root != NULL)
> - err = insert_resource(root, res);
> + err = request_resource(root, res);
>
> if (err) {
> + const char *dtype = resource < PCI_BRIDGE_RESOURCES ? "device" : "bridge";
> dev_err(&dev->dev, "BAR %d: %s of %s %pR\n",
> resource,
> root ? "address space collision on" :
> --


This patch introduces a warning on my system:

pci 0000:02:03.0: BAR 6: address space collision on of device [0xff680000-0xff69ffff]
Below are iomem and pci dev info in the bad and good cases (good = patch reverted).
This isn't fatal here: the e1000's disabled expansion rom gets reassigned to elsewhere.

warning case:

00000000-0000ffff : reserved
00010000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000e0000-000fffff : reserved
000f0000-000fffff : System ROM
00100000-3ff3ffff : System RAM
01000000-013a4d48 : Kernel code
013a4d49-0155bb93 : Kernel data
0159c000-015f054b : Kernel bss
3ff40000-3ff4ffff : ACPI Tables
3ff50000-3fffffff : ACPI Non-volatile Storage
40000000-400003ff : 0000:00:1f.1
44000000-47ffffff : PCI CardBus 0000:03
48000000-4bffffff : PCI CardBus 0000:03
ce900000-de9fffff : PCI Bus 0000:01
d0000000-d7ffffff : 0000:01:00.0
dea00000-deafffff : PCI Bus 0000:02
dea00000-dea1ffff : 0000:02:03.0
e0000000-efffffff : 0000:00:00.0
fec00000-fec00fff : pnp 00:09
fee00000-fee00fff : pnp 00:09
ff500000-ff5fffff : PCI Bus 0000:01
ff5c0000-ff5dffff : 0000:01:00.0
ff5f0000-ff5fffff : 0000:01:00.0
ff600000-ff6fffff : PCI Bus 0000:02
ff600000-ff600fff : 0000:02:01.0
ff600000-ff600fff : yenta_socket
ff6a0000-ff6bffff : 0000:02:03.0
ff6a0000-ff6bffff : e1000
ff6c0000-ff6dffff : 0000:02:03.0
ff6c0000-ff6dffff : e1000
ff6f7000-ff6f7fff : 0000:02:04.0
ff6f7000-ff6f7fff : ohci_hcd
ff6f8000-ff6fbfff : 0000:02:01.2
ff6fc000-ff6fcfff : 0000:02:04.1
ff6fc000-ff6fcfff : ohci_hcd
ff6fd000-ff6fdfff : 0000:02:02.0
ff6fd000-ff6fdfff : ipw2200
ff6fe400-ff6fe4ff : 0000:02:04.2
ff6fe400-ff6fe4ff : ehci_hcd
ff6fe800-ff6fefff : 0000:02:01.2
ff6fe800-ff6fefff : firewire_ohci
ff6ff000-ff6fffff : 0000:02:01.3
ff7ff400-ff7ff4ff : 0000:00:1f.5
ff7ff400-ff7ff4ff : Intel 82801DB-ICH4
ff7ff800-ff7ff9ff : 0000:00:1f.5
ff7ff800-ff7ff9ff : Intel 82801DB-ICH4
ff7ffc00-ff7fffff : 0000:00:1d.7
ff7ffc00-ff7fffff : ehci_hcd
ff800000-ffbfffff : pnp 00:08
ffc00000-ffffffff : pnp 00:08
02:03.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller
Subsystem: Sony Corporation Device 818e
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (63750ns min), Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 9
Region 0: Memory at ff6c0000 (32-bit, non-prefetchable) [size=128K]
Region 1: Memory at ff6a0000 (32-bit, non-prefetchable) [size=128K]
Region 2: I/O ports at dc00 [size=64]
Expansion ROM at dea00000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [e4] PCI-X non-bridge device
Command: DPERE- ERO+ RBC=512 OST=1
Status: Dev=00:00.0 64bit- 133MHz- SCD- USC- DC=simple DMMRBC=2048 DMOST=1 DMCRS=8 RSCEM- 266MHz- 533MHz-
Kernel driver in use: e1000


And in the working case (the patch reverted):

00000000-0000ffff : reserved
00010000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000e0000-000fffff : reserved
000f0000-000fffff : System ROM
00100000-3ff3ffff : System RAM
01000000-013a4d48 : Kernel code
013a4d49-0155bb93 : Kernel data
0159c000-015f054b : Kernel bss
3ff40000-3ff4ffff : ACPI Tables
3ff50000-3fffffff : ACPI Non-volatile Storage
40000000-400003ff : 0000:00:1f.1
44000000-47ffffff : PCI CardBus 0000:03
48000000-4bffffff : PCI CardBus 0000:03
ce900000-de9fffff : PCI Bus 0000:01
d0000000-d7ffffff : 0000:01:00.0
dea00000-deafffff : PCI Bus 0000:02
e0000000-efffffff : 0000:00:00.0
fec00000-fec00fff : pnp 00:09
fee00000-fee00fff : pnp 00:09
ff500000-ff5fffff : PCI Bus 0000:01
ff5c0000-ff5dffff : 0000:01:00.0
ff5f0000-ff5fffff : 0000:01:00.0
ff600000-ff6fffff : PCI Bus 0000:02
ff600000-ff600fff : 0000:02:01.0
ff600000-ff600fff : yenta_socket
ff680000-ff69ffff : 0000:02:03.0
ff6a0000-ff6bffff : 0000:02:03.0
ff6a0000-ff6bffff : e1000
ff6c0000-ff6dffff : 0000:02:03.0
ff6c0000-ff6dffff : e1000
ff6f7000-ff6f7fff : 0000:02:04.0
ff6f7000-ff6f7fff : ohci_hcd
ff6f8000-ff6fbfff : 0000:02:01.2
ff6fc000-ff6fcfff : 0000:02:04.1
ff6fc000-ff6fcfff : ohci_hcd
ff6fd000-ff6fdfff : 0000:02:02.0
ff6fd000-ff6fdfff : ipw2200
ff6fe400-ff6fe4ff : 0000:02:04.2
ff6fe400-ff6fe4ff : ehci_hcd
ff6fe800-ff6fefff : 0000:02:01.2
ff6fe800-ff6fefff : firewire_ohci
ff6ff000-ff6fffff : 0000:02:01.3
ff7ff400-ff7ff4ff : 0000:00:1f.5
ff7ff400-ff7ff4ff : Intel 82801DB-ICH4
ff7ff800-ff7ff9ff : 0000:00:1f.5
ff7ff800-ff7ff9ff : Intel 82801DB-ICH4
ff7ffc00-ff7fffff : 0000:00:1d.7
ff7ffc00-ff7fffff : ehci_hcd
ff800000-ffbfffff : pnp 00:08
ffc00000-ffffffff : pnp 00:08
02:03.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller
Subsystem: Sony Corporation Device 818e
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64 (63750ns min), Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 9
Region 0: Memory at ff6c0000 (32-bit, non-prefetchable) [size=128K]
Region 1: Memory at ff6a0000 (32-bit, non-prefetchable) [size=128K]
Region 2: I/O ports at dc00 [size=64]
Expansion ROM at ff680000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [e4] PCI-X non-bridge device
Command: DPERE- ERO+ RBC=512 OST=1
Status: Dev=00:00.0 64bit- 133MHz- SCD- USC- DC=simple DMMRBC=2048 DMOST=1 DMCRS=8 RSCEM- 266MHz- 533MHz-
Kernel driver in use: e1000

Thanks!
Manuel Lauss


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