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
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