Good morning,
I'm working on a problem from one of our customers, which has an issue
with one of our PCI adapters.
This PCI adapter is a standard and well proven board:
$ lspci -v
...
04:08.0 Network controller: PEAK-System Technik GmbH PCAN-PCI CAN-Bus
controller (rev 02)
Subsystem: PEAK-System Technik GmbH 2 Channel CAN Bus SJC1000
Flags: medium devsel, IRQ 11
Memory at f0410000 (32-bit, non-prefetchable) [size=64K]
Memory at f0400000 (32-bit, non-prefetchable) [size=64K]
Kernel driver in use: pcan
The running system is:
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 3.1.9-1.4-desktop (geeko@buildhost) (gcc
version 4.6.2 (SUSE Linux) ) #1 SMP PREEMPT Fri Jan 27 08:55:10 UTC 2012
(efb5ff4)
...
[ 0.000000] Kernel command line:
root=/dev/disk/by-id/ata-SPCC_Solid_State_DiskB28_00000000000000000015-part2
resume=/dev/disk/by-id/ata-SPCC_Solid_State_DiskB28_00000000000000000015-part1
splash=silent quiet vga=0x31b
...
[ 0.471267] ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 10 *11 12
14 15)
[ 0.471323] ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 10 11 12
14 15) *7
[ 0.471378] ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 10 11 12
14 15) *7
[ 0.471434] ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 *10 11 12
14 15)
[ 0.471487] ACPI: PCI Interrupt Link [LNKE] (IRQs 1 3 4 5 6 10 11 12
14 15) *0, disabled.
[ 0.471541] ACPI: PCI Interrupt Link [LNKF] (IRQs 1 3 4 5 6 10 11 12
14 15) *0, disabled.
[ 0.471594] ACPI: PCI Interrupt Link [LNKG] (IRQs 1 3 4 5 6 *10 11 12
14 15)
[ 0.471647] ACPI: PCI Interrupt Link [LNKH] (IRQs 1 3 4 5 6 10 *11 12
14 15)
The customer does not succeed to send and receive data to/from this card
and we suspect an IRQ related issue. For example, loading our (good old)
"pcan" driver leads to the below logs:
...
[ 6.186877] pci 0000:00:1e.0: can't derive routing for PCI INT A
[ 6.186878] pcan 0000:04:08.0: PCI INT A: no GSI - using ISA IRQ 11
...
My questions are:
- why does the customer system not succeed to "derive" routing for INTA?
And why us? ;-)
- since the system looks like it switched in old "ISA" mode, should the
driver run differently (IRQ not shared, for example) or is this
transparently handled by the Kernel?
(implied question: how to fix this problem by the customer?)
Many thanks for your time and your help,
Stéphane Grosjean
--
PEAK-System Technik GmbH, Otto-Roehm-Strasse 69, D-64293 Darmstadt
Geschaeftsleitung: A.Gach/U.Wilhelm,St.Nr.:007/241/13586 FA Darmstadt
HRB-9183 Darmstadt, Ust.IdNr.:DE 202220078, WEE-Reg.-Nr.: DE39305391
Tel.+49 (0)6151-817320 / Fax:+49 (0)6151-817329, info@xxxxxxxxxxxxxxx
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