Re: 2.6.25-rc2: ohci1394 problem

From: Stefan Richter
Date: Sat Feb 23 2008 - 12:40:58 EST

Thomas Meyer wrote:
[...]
[ 847.320251] ohci1394: Unknown symbol hpsb_iso_packet_sent
[ 847.320328] ohci1394: Unknown symbol hpsb_packet_sent
[ 847.320406] ohci1394: Unknown symbol dma_region_sync_for_cpu
[ 847.320513] ohci1394: Unknown symbol hpsb_selfid_received
[ 847.320586] ohci1394: Unknown symbol hpsb_bus_reset

Used insmod? Use modprobe, or resolve the module dependencies manually.

[ 856.789954] ACPI: PCI Interrupt 0000:0c:03.0[A] -> GSI 19 (level, low) -> IRQ 19
[ 856.790040] ------------[ cut here ]------------
[ 856.790044] WARNING: at arch/x86/mm/ioremap.c:137 __ioremap+0xa7/0x16a()
[ 856.790048] Modules linked in: ohci1394(+) ieee1394 wlan_wep wlan_scan_sta ath_rate_sample ath_pci wlan ath_hal(P) firmware_class fuse snd_seq snd_seq_device nls_iso8859_15 nls_cp850 vfat fat usbhid appletouch applesmc input_polldev led_class dummy binfmt_misc tun pktcdvd loop msr cpuid coretemp hwmon eeprom cpufreq_powersave cpufreq_conservative acpi_cpufreq thermal ehci_hcd tpm_infineon i2c_i801 i2c_core tpm uhci_hcd usbcore tpm_bios processor ac battery sr_mod rng_core iTCO_wdt button firewire_ohci firewire_core sg snd_hda_intel snd_pcm snd_timer snd soundcore snd_page_alloc evdev intel_agp cdrom [last unloaded: microcode]
[ 856.790119] Pid: 7140, comm: insmod Tainted: P 2.6.25-rc2 #115
[ 856.790125] [<c011e5ab>] warn_on_slowpath+0x40/0x4f
[ 856.790143] [<c0118045>] __wake_up+0x29/0x39
[ 856.790154] [<c0277305>] netlink_broadcast+0x26e/0x2af
[ 856.790169] [<c01cc36b>] kobject_uevent_env+0x33d/0x361
[ 856.790178] [<c025ef2b>] pci_mmcfg_write+0xc4/0xd5
[ 856.790187] [<c0260157>] raw_pci_write+0x3e/0x46
[ 856.790200] [<c01148f8>] __ioremap+0xa7/0x16a
[ 856.790210] [<f8b14425>] ohci1394_pci_probe+0x20c/0x5a6 [ohci1394]
[ 856.790226] [<c01d63f1>] pci_device_probe+0x36/0x55

Wait a minute. Why is the line 856.790048 saying that firewire-ohci is present, but the preceding portions of dmesg don't show any initialization messages from firewire-ohci?

BTW, I just tested again: I can modprobe ohci1394 with firewire-ohci already present, also modprobe firewire-ohci with ohci1394 already present, and in either case the expected happens: The driver first loaded is being bound to the PCI device, the driver loaded second just sits there unused. I can unload the first driver, trigger a re-probe of the PCI device via sysfs and the 2nd driver gets bound and works. I can unload and reload the two drivers in any order without problem. So far I an unable to reproduce what you got.

[ 856.790236] [<c02226cb>] driver_probe_device+0x9d/0x114
[ 856.790246] [<c0222826>] __driver_attach+0x52/0x87
[ 856.790254] [<c0221d46>] bus_for_each_dev+0x35/0x57
[ 856.790265] [<c022257e>] driver_attach+0x11/0x13
[ 856.790270] [<c02227d4>] __driver_attach+0x0/0x87
[ 856.790277] [<c02223bc>] bus_add_driver+0x91/0x195
[ 856.790286] [<c02229d9>] driver_register+0x45/0x9a
[ 856.790297] [<c01d65a6>] __pci_register_driver+0x32/0x60
[ 856.790305] [<c013aea0>] sys_init_module+0x16b7/0x179f
[ 856.790495] [<c0160bb9>] do_sync_read+0xbe/0x103
[ 856.790518] [<c01549fc>] anon_vma_prepare+0x11/0xa6
[ 856.790529] [<f8b55185>] hpsb_bus_reset+0x0/0xe2 [ieee1394]
[ 856.790560] [<c0171db7>] mntput_no_expire+0x13/0x5d
[ 856.790569] [<c015f6ce>] filp_close+0x4d/0x53
[ 856.790578] [<c01048a2>] sysenter_past_esp+0x5f/0x85
[ 856.790595] =======================
[ 856.790598] ---[ end trace 5b0384c17c339107 ]---
[ 856.943807] ohci1394: fw-host0: Get PHY Reg timeout [0x00008400/0x00000000/100]
[ 856.947140] ohci1394: fw-host0: Set PHY Reg timeout [0x000044c0/0x00004000/100]
[ 856.947261] ohci1394: fw-host0: OHCI-1394 0.35 (PCI): IRQ=[19] MMIO=[100000000-1000007ff] Max Packet=[65536] IR/IT contexts=[32/32]

The "Max Packet" and "IR/IT contexts" values are bogus because several MMIO reads returned ~0 (all bits set to one).

My conclusion so far: There is something wrong with your system which is below/ before the control of the ieee1394 or firewire stack.

BTW, there was a single change to ohci1394 after v2.6.24 and that does not affect the initialization code of ohci1394. (Patch name is "ieee1394: ohci1394: don't schedule IT tasklets on IR events".) Did you ever use kernels before 2.6.25-rc2 and had both of ohci1394 and firewire-ohci inserted?

If you switch CONFIG_FIREWIRE_OHCI off in the kernel config of 2.6.25-rc2, rebuild and reinstall the modules and reboot, does the problem vanish?
--
Stefan Richter
-=====-==--- --=- =-===
http://arcgraph.de/sr/
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