Hi
I'm getting tthis warning printed with current 3.8-rc kernel
My hw is Lenovo T61.
[ 5.920284] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
[ 5.976605] systemd[1]: Started NFS file locking service..
[ 5.982624] NFSD: starting 90-second grace period (net ffffffff81aa08c0)
[ 5.987930] ------------[ cut here ]------------
[ 5.988026] WARNING: at lib/dma-debug.c:933 check_unmap+0x4ae/0x9a0()
[ 5.988111] Hardware name: 6464CTO
[ 5.988194] iwl3945 0000:03:00.0: DMA-API: device driver failed to check
map error[device address=0x00000000bb7a7800] [size=4096 bytes] [mapped as page]
[ 5.988286] Modules linked in:
[ 5.988411] rfcomm bnep btusb bluetooth snd_hda_codec_analog iTCO_wdt
iTCO_vendor_support arc4 hid_generic iwl3945 iwlegacy mac80211 snd_hda_intel
snd_hda_codec coretemp snd_seq psmouse i2c_i801 serio_raw microcode i2c_core
snd_seq_device r852 sm_common cfg80211 nand snd_pcm nand_ecc r592 nand_ids mtd
memstick lpc_ich mfd_core e1000e thinkpad_acpi snd_page_alloc ehci_pci
snd_timer ehci_hcd nvram wmi snd soundcore evdev binfmt_misc usbhid hid loop
vhost_net tun kvm_intel kvm nfsd exportfs auth_rpcgss nfs_acl lockd sunrpc
dm_mod pcmcia sr_mod cdrom sdhci_pci sdhci mmc_core yenta_socket uhci_hcd
usbcore usb_common video backlight autofs4
[ 5.992114] Pid: 635, comm: libvirtd Not tainted 3.8.0-rc5-00006-g0e5e62f #119
[ 5.992177] Call Trace:
[ 5.992177] <IRQ> [<ffffffff8103fcd0>] warn_slowpath_common+0x70/0xa0
[ 5.992177] [<ffffffff8103fd4c>] warn_slowpath_fmt+0x4c/0x50
[ 5.992177] [<ffffffff8132e18e>] check_unmap+0x4ae/0x9a0
[ 5.992177] [<ffffffff8132e6df>] debug_dma_unmap_page+0x5f/0x70
[ 5.992177] [<ffffffff81329b50>] ? unmap_single+0x20/0x30
[ 5.992177] [<ffffffffa05584b2>] il3945_irq_tasklet+0x392/0x710 [iwl3945]
[ 5.992177] [<ffffffff810498e8>] tasklet_action+0x98/0x220
[ 5.992177] [<ffffffff8104a10f>] __do_softirq+0xdf/0x3f0
[ 5.992177] [<ffffffff8156adcc>] call_softirq+0x1c/0x30
[ 5.992177] [<ffffffff810045f5>] do_softirq+0x65/0xa0
[ 5.992177] [<ffffffff8104a5d5>] irq_exit+0xc5/0xd0
[ 5.992177] [<ffffffff8156b486>] do_IRQ+0x56/0xc0
[ 5.992177] [<ffffffff81564ffc>] ? __do_page_fault+0x20c/0x5b0
[ 5.992177] [<ffffffff81561def>] common_interrupt+0x6f/0x6f
[ 5.992177] <EOI> [<ffffffff810b1a9e>] ? lock_release+0xae/0x300
[ 5.992177] [<ffffffff81073aef>] up_read+0x1f/0x40
[ 5.992177] [<ffffffff81564ffc>] __do_page_fault+0x20c/0x5b0
[ 5.992177] [<ffffffff810af0b5>] ? trace_hardirqs_on_caller+0x115/0x1a0
[ 5.992177] [<ffffffff815622e3>] ? error_sti+0x5/0x6
[ 5.992177] [<ffffffff8131c1cd>] ? trace_hardirqs_off_thunk+0x3a/0x3c
[ 5.992177] [<ffffffff815653ae>] do_page_fault+0xe/0x10
[ 5.992177] [<ffffffff815620e2>] page_fault+0x22/0x30
[ 5.992177] ---[ end trace c0d06cdbbf41cb39 ]---
[ 5.992177] Mapped at:
[ 5.992177] [<ffffffff8132eab1>] debug_dma_map_page+0x91/0x140
[ 5.992177] [<ffffffffa05555fa>] il3945_rx_allocate+0xaa/0x270 [iwl3945]
[ 5.992177] [<ffffffffa0558efb>] il3945_rx_replenish+0x1b/0x50 [iwl3945]
[ 5.992177] [<ffffffffa055b4b1>] il3945_hw_nic_init+0x1a1/0x5e0 [iwl3945]
[ 5.992177] [<ffffffffa0556790>] __il3945_up+0xc0/0x2d0 [iwl3945]
Zdenek
On Mon, Jan 28, 2013 at 03:09:03PM +0100, Zdenek Kabelac wrote:
> I'm getting tthis warning printed with current 3.8-rc kernel
> My hw is Lenovo T61.
>
>
> [ 5.920284] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
> [ 5.976605] systemd[1]: Started NFS file locking service..
> [ 5.982624] NFSD: starting 90-second grace period (net ffffffff81aa08c0)
> [ 5.987930] ------------[ cut here ]------------
> [ 5.988026] WARNING: at lib/dma-debug.c:933 check_unmap+0x4ae/0x9a0()
> [ 5.988111] Hardware name: 6464CTO
> [ 5.988194] iwl3945 0000:03:00.0: DMA-API: device driver failed
> to check map error[device address=0x00000000bb7a7800] [size=4096
> bytes] [mapped as page]
We have to check dma_map_*() error. Fixing all of calls to dma_map* in
iwlegacy is not so simple. For now, you can just ignore this WARNING or
disable CONFIG_DMA_API_DEBUG.
Stanislaw
On Thu, Mar 07, 2013 at 11:18:37PM +0100, Zdenek Kabelac wrote:
> I've now tested 3.9-rc1 and it seems to be getting even worse.
> (and 3.8 is not really good either)
>
> iwl3945 0000:03:00.0: Error sending C_RXON: time out after 500ms.
> iwl3945 0000:03:00.0: Error setting new configuration (-110).
This looks like firmware crash.
> ------------[ cut here ]------------
> WARNING: at lib/dma-debug.c:883 check_unmap+0xfb/0x9a0()
[snip]
> Pid: 50, comm: kworker/u:3 Not tainted 3.9.0-rc1-00114-gd356175 #144
Does this version include commit bdb084b22d8aee66c87af5e9c36bd6cf7f3bccfd
"iwlegacy: more checks for dma mapping errors" ?
> iwl3945 0000:03:00.0: Microcode SW error detected. Restarting 0x82000008.
> iwl3945 0000:03:00.0: Loaded firmware version: 15.32.2.9
> iwl3945 0000:03:00.0: Start IWL Error Log Dump:
> iwl3945 0000:03:00.0: Status: 0x000202E4, count: 1
> iwl3945 0000:03:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line
> iwl3945 0000:03:00.0: SYSASSERT (0x5) 0000201255 0x008B6
> 0x00274 0x00320 0x04CA6 116
>
> iwl3945 0000:03:00.0: Error Reply type 0x00000005 cmd C_TX (0x1C)
> seq 0x0000 ser 0x00740000
> iwl3945 0000:03:00.0: Error: Response NULL in 'C_ADD_STA'
> iwl3945 0000:03:00.0: Adding station ff:ff:ff:ff:ff:ff failed.
> iwl3945 0000:03:00.0: Error setting Tx power (-5).
> iwl3945 0000:03:00.0: Can't stop Rx DMA.
> ieee80211 phy0: Hardware restart was requested
>
>
> And driver is effectively unusable - since it's just restarting....
>
> Also 'state' of iwl3945 in 3.8 is quite 'far' from stable as well.
> quite often I can see, that I'm disconnected from AP, and while
> network manager shows other 'visible' AP available for connection,
> my home AP is not listed anymore - and to see it again I'd to switch
> wifi support on/off - just after this I'd reattach to my home AP -
> so quite annoying - and major reason to stay with 3.7 kernel for
> stable wifi.
We do not have much changes in iwlegacy driver between 3.7 and 3.8 (and
between 3.8 and 3.9). Most likely mac80211 changes are causing iwl3945
driver or firmware problems. Let's try to debug that on 3.8.
Please provide verbose debug messages, to do this you have to configure
syslog daemon to log kernel debug messages into some file, let say
/var/log/kernel. For rsyslogd this mean adding:
kern.* /var/log/kernel
to /etc/rsyslog.conf
Then restart rsyslog service and grab debug messages:
modprobe -r iwl3945
echo > /var/log/kernel
modprobe iwl3945 debug=0x47ffffff
# Reproduce the problem
modprobe -r iwl3945
Then send me privately /var/log/kernel file (compressed if needed).
Stanislaw
Dne 29.1.2013 14:08, Stanislaw Gruszka napsal(a):
> On Mon, Jan 28, 2013 at 03:09:03PM +0100, Zdenek Kabelac wrote:
>> I'm getting tthis warning printed with current 3.8-rc kernel
>> My hw is Lenovo T61.
>>
>>
>> [ 5.920284] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
>> [ 5.976605] systemd[1]: Started NFS file locking service..
>> [ 5.982624] NFSD: starting 90-second grace period (net ffffffff81aa08c0)
>> [ 5.987930] ------------[ cut here ]------------
>> [ 5.988026] WARNING: at lib/dma-debug.c:933 check_unmap+0x4ae/0x9a0()
>> [ 5.988111] Hardware name: 6464CTO
>> [ 5.988194] iwl3945 0000:03:00.0: DMA-API: device driver failed
>> to check map error[device address=0x00000000bb7a7800] [size=4096
>> bytes] [mapped as page]
>
> We have to check dma_map_*() error. Fixing all of calls to dma_map* in
> iwlegacy is not so simple. For now, you can just ignore this WARNING or
> disable CONFIG_DMA_API_DEBUG.
>
I've now tested 3.9-rc1 and it seems to be getting even worse.
(and 3.8 is not really good either)
iwl3945 0000:03:00.0: Error sending C_RXON: time out after 500ms.
iwl3945 0000:03:00.0: Error setting new configuration (-110).
------------[ cut here ]------------
WARNING: at lib/dma-debug.c:883 check_unmap+0xfb/0x9a0()
Hardware name: 6464CTO
iwl3945 0000:03:00.0: DMA-API: device driver frees DMA memory with different
size [device address=0x00000000bb8e5000] [map size=80 bytes] [unmap size=21 bytes]
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables bridge
stp llc rfcomm bnep btusb bluetooth snd_hda_codec_analog arc4 iwl3945 iTCO_wdt
iTCO_vendor_support iwlegacy mac80211 snd_hda_intel snd_hda_codec psmouse
snd_seq serio_raw coretemp snd_seq_device microcode cfg80211 snd_pcm e1000e
i2c_i801 r852 i2c_core sm_common nand ipv6 nand_ecc ptp nand_ids r592 mtd
memstick snd_page_alloc ehci_pci ehci_hcd lpc_ich snd_timer pps_core mfd_core
thinkpad_acpi nvram snd soundcore wmi evdev binfmt_misc loop vhost_net tun
kvm_intel kvm nfsd exportfs auth_rpcgss nfs_acl lockd sunrpc dm_mod pcmcia
sr_mod cdrom sdhci_pci yenta_socket sdhci mmc_core uhci_hcd usbcore usb_common
video backlight autofs4
Pid: 50, comm: kworker/u:3 Not tainted 3.9.0-rc1-00114-gd356175 #144
Call Trace:
[<ffffffff81040440>] warn_slowpath_common+0x70/0xa0
[<ffffffff810404bc>] warn_slowpath_fmt+0x4c/0x50
[<ffffffff8133922b>] check_unmap+0xfb/0x9a0
[<ffffffff81339b2f>] debug_dma_unmap_page+0x5f/0x70
[<ffffffffa05a3108>] il3945_hw_txq_free_tfd+0xc8/0x1f0 [iwl3945]
[<ffffffffa04b02a6>] il_tx_queue_unmap+0x46/0x60 [iwlegacy]
[<ffffffffa04b435d>] il_tx_queue_free+0x3d/0x130 [iwlegacy]
[<ffffffffa05a366d>] il3945_hw_txq_ctx_free+0x3d/0x80 [iwl3945]
[<ffffffffa059e6b8>] __il3945_down+0x308/0x330 [iwl3945]
[<ffffffffa059e708>] il3945_down+0x28/0x60 [iwl3945]
[<ffffffffa059eb09>] il3945_bg_restart+0x99/0xb0 [iwl3945]
[<ffffffff81064486>] process_one_work+0x1f6/0x690
[<ffffffff81064424>] ? process_one_work+0x194/0x690
[<ffffffff81064c95>] worker_thread+0x115/0x3d0
[<ffffffff81064b80>] ? rescuer_thread+0x260/0x260
[<ffffffff8106e8ce>] kthread+0xde/0xf0
[<ffffffff8106e7f0>] ? insert_kthread_work+0x70/0x70
[<ffffffff8157eedc>] ret_from_fork+0x7c/0xb0
[<ffffffff8106e7f0>] ? insert_kthread_work+0x70/0x70
---[ end trace af4ae3f2874322ec ]---
Mapped at:
[<ffffffff813385b1>] debug_dma_map_page+0x91/0x140
[<ffffffffa059fde4>] il3945_mac_tx+0x404/0xa50 [iwl3945]
[<ffffffffa0528e81>] __ieee80211_tx+0x121/0x3e0 [mac80211]
[<ffffffffa052b458>] ieee80211_tx+0xd8/0x100 [mac80211]
[<ffffffffa052b81b>] ieee80211_xmit+0x8b/0xb0 [mac80211]
ieee80211 phy0: Hardware restart was requested
Ebtables v2.0 registered
Meanwhile Network manager is getting confused
iwl3945 0000:03:00.0: Microcode SW error detected. Restarting 0x82000008.
iwl3945 0000:03:00.0: Loaded firmware version: 15.32.2.9
iwl3945 0000:03:00.0: Start IWL Error Log Dump:
iwl3945 0000:03:00.0: Status: 0x000202E4, count: 1
iwl3945 0000:03:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line
iwl3945 0000:03:00.0: SYSASSERT (0x5) 0000201255 0x008B6 0x00274 0x00320
0x04CA6 116
iwl3945 0000:03:00.0: Error Reply type 0x00000005 cmd C_TX (0x1C) seq 0x0000
ser 0x00740000
iwl3945 0000:03:00.0: Error: Response NULL in 'C_ADD_STA'
iwl3945 0000:03:00.0: Adding station ff:ff:ff:ff:ff:ff failed.
iwl3945 0000:03:00.0: Error setting Tx power (-5).
iwl3945 0000:03:00.0: Can't stop Rx DMA.
ieee80211 phy0: Hardware restart was requested
And driver is effectively unusable - since it's just restarting....
Also 'state' of iwl3945 in 3.8 is quite 'far' from stable as well.
quite often I can see, that I'm disconnected from AP, and while
network manager shows other 'visible' AP available for connection,
my home AP is not listed anymore - and to see it again I'd to switch
wifi support on/off - just after this I'd reattach to my home AP - so quite
annoying - and major reason to stay with 3.7 kernel for stable wifi.
Zdenek