These have been happening in my boot kernels now for some time. Perhaps somebody should rethink of how the ftdi_sio is initialized ? Or maybe to remove this warning to begin with? Oct 3 02:19:58 mea kernel: WARNING: at lib/dma-debug.c:860 check_for_stack+0xa9/0xe8() (Not tainted) Oct 3 02:19:58 mea kernel: Hardware name: System Product Name Oct 3 02:19:58 mea kernel: ehci_hcd 0000:00:02.1: DMA-API: device driver maps memory fromstack [addr=ffff8801481f587e] Oct 3 02:19:58 mea kernel: Modules linked in: ftdi_sio(+) snd_ac97_codec firewire_ohci(+) usbserial gameport(+) ac97_bus tveeprom skge(+) snd_hwdep parport btusb snd_pcm firewire_core snd_timer snd crc_itu_t amd64_edac_mod(+) asus_atk0110 bluetooth forcedeth(+) k8temp soundcore hwmon edac_core i2c_nforce2 snd_page_alloc rfkill serio_raw usb_storage raid456 raid6_pq async_xor async_memcpy async_tx xor ata_generic pata_acpi sata_sil sata_nv pata_amd radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan] Oct 3 02:19:58 mea kernel: Pid: 679, comm: modprobe Not tainted 2.6.31.1-56.fc12.x86_64 #1 Oct 3 02:19:58 mea kernel: Call Trace: Oct 3 02:19:58 mea kernel: [<ffffffff8106422c>] warn_slowpath_common+0x95/0xc3 Oct 3 02:19:58 mea kernel: [<ffffffff810642e7>] warn_slowpath_fmt+0x50/0x66 Oct 3 02:19:58 mea kernel: [<ffffffff8128d909>] check_for_stack+0xa9/0xe8 Oct 3 02:19:58 mea kernel: [<ffffffff8128e65e>] debug_dma_map_page+0xd9/0x116 Oct 3 02:19:58 mea kernel: [<ffffffff813b3292>] dma_map_single_attrs.clone.2+0xcc/0xf3 Oct 3 02:19:58 mea kernel: [<ffffffff813b33f1>] usb_hcd_submit_urb+0x138/0xa07 Oct 3 02:19:58 mea kernel: [<ffffffff810962e5>] ? debug_check_no_locks_freed+0x13d/0x16a Oct 3 02:19:58 mea kernel: [<ffffffff81096136>] ? trace_hardirqs_on_caller+0x139/0x175 Oct 3 02:19:58 mea kernel: [<ffffffff81094e69>] ? lockdep_init_map+0xad/0x138 Oct 3 02:19:58 mea kernel: [<ffffffff813b4397>] usb_submit_urb+0x25a/0x2ed Oct 3 02:19:58 mea kernel: [<ffffffff8108192b>] ? __init_waitqueue_head+0x4d/0x76 Oct 3 02:19:58 mea kernel: [<ffffffff813b5cfd>] usb_start_wait_urb+0x71/0x1d4 Oct 3 02:19:58 mea kernel: [<ffffffff813b60fb>] usb_control_msg+0x10c/0x144 Oct 3 02:19:58 mea kernel: [<ffffffffa02e254f>] ftdi_sio_port_probe+0x596/0x67f [ftdi_sio] Oct 3 02:19:58 mea kernel: [<ffffffff811aa410>] ? sysfs_do_create_link+0xf6/0x161 Oct 3 02:19:58 mea kernel: [<ffffffffa02a6050>] usb_serial_device_probe+0x67/0x11a [usbserial] Oct 3 02:19:58 mea kernel: [<ffffffff81351e4f>] ? driver_sysfs_add+0x5b/0x96 Oct 3 02:19:58 mea kernel: [<ffffffff81352063>] driver_probe_device+0xed/0x22a Oct 3 02:19:58 mea kernel: [<ffffffff81352293>] __device_attach+0x4d/0x68 Oct 3 02:19:58 mea kernel: [<ffffffff81352246>] ? __device_attach+0x0/0x68 Oct 3 02:19:58 mea kernel: [<ffffffff81350e2b>] bus_for_each_drv+0x68/0xb3 Oct 3 02:19:58 mea kernel: [<ffffffff81352375>] device_attach+0x75/0xa0 Oct 3 02:19:58 mea kernel: [<ffffffff81350be3>] bus_attach_device+0x41/0x91 Oct 3 02:19:58 mea kernel: [<ffffffff8134eac9>] device_add+0x401/0x5ac Oct 3 02:19:58 mea kernel: [<ffffffff8134eca1>] device_register+0x2d/0x48 Oct 3 02:19:58 mea kernel: [<ffffffffa02a3eb1>] usb_serial_probe+0xf5f/0x116d [usbserial] Oct 3 02:19:58 mea kernel: [<ffffffff81096136>] ? trace_hardirqs_on_caller+0x139/0x175 Oct 3 02:19:58 mea kernel: [<ffffffff81096192>] ? trace_hardirqs_on+0x20/0x36 Oct 3 02:19:58 mea kernel: [<ffffffff815047b0>] ? mutex_unlock+0x21/0x37 Oct 3 02:19:58 mea kernel: [<ffffffff813b7d67>] ? usb_pm_unlock+0x28/0x3e Oct 3 02:19:58 mea kernel: [<ffffffff813b810b>] ? usb_autopm_do_device+0xd3/0xf3 Oct 3 02:19:58 mea kernel: [<ffffffff813b8dec>] usb_probe_interface+0x158/0x21f Oct 3 02:19:58 mea kernel: [<ffffffff81352063>] driver_probe_device+0xed/0x22a Oct 3 02:19:58 mea kernel: [<ffffffff8135220c>] __driver_attach+0x6c/0xa6 Oct 3 02:19:58 mea kernel: [<ffffffff813521a0>] ? __driver_attach+0x0/0xa6 Oct 3 02:19:58 mea kernel: [<ffffffff813511ff>] bus_for_each_dev+0x68/0xb3 Oct 3 02:19:58 mea kernel: [<ffffffff81351d62>] driver_attach+0x31/0x47 Oct 3 02:19:58 mea kernel: [<ffffffff81351933>] bus_add_driver+0x109/0x286 Oct 3 02:19:58 mea kernel: [<ffffffff8135262a>] driver_register+0xac/0x134 Oct 3 02:19:58 mea kernel: [<ffffffff813b8af8>] usb_register_driver+0xca/0x149 Oct 3 02:19:58 mea kernel: [<ffffffffa00410b5>] ftdi_init+0xb5/0xf4 [ftdi_sio] Oct 3 02:19:58 mea kernel: [<ffffffffa0041000>] ? ftdi_init+0x0/0xf4 [ftdi_sio] Oct 3 02:19:58 mea kernel: [<ffffffff8100a0b3>] do_one_initcall+0x81/0x1b9 Oct 3 02:19:58 mea kernel: [<ffffffff810a442e>] sys_init_module+0xe7/0x239 Oct 3 02:19:58 mea kernel: [<ffffffff81011f42>] system_call_fastpath+0x16/0x1b Oct 3 02:19:58 mea kernel: ---[ end trace cb1ec666abce57cb ]--- Oct 3 02:19:58 mea kernel: usb 1-10.3: FTDI USB Serial Device converter now attached to ttyUSB0 Oct 3 02:19:58 mea kernel: ftdi_sio 1-10.3:1.1: FTDI USB Serial Device converter detected Oct 3 02:19:58 mea kernel: usb 1-10.3: Detected FT2232C Oct 3 02:19:58 mea kernel: usb 1-10.3: Number of endpoints 2 Oct 3 02:19:58 mea kernel: usb 1-10.3: Endpoint 1 MaxPacketSize 64 Oct 3 02:19:58 mea kernel: usb 1-10.3: Endpoint 2 MaxPacketSize 64 Oct 3 02:19:58 mea kernel: usb 1-10.3: Setting MaxPacketSize 64 Oct 3 02:19:58 mea kernel: usb 1-10.3: FTDI USB Serial Device converter now attached to ttyUSB1 Oct 3 02:19:58 mea kernel: usbcore: registered new interface driver ftdi_sio Oct 3 02:19:58 mea kernel: ftdi_sio: v1.5.0:USB FTDI Serial Converters Driver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
