On Thu, 1 Jun 2006 21:16:54 +0200 Frank Gevaerts <[EMAIL PROTECTED]> wrote:
| When I changed te ipaq_open code to only submit the read urb after the | control message succeeds, these disappear. | | Whenever the usb_control_msg returns with ETIMEDOUT (-110), in both code | variants, when the device is disconnected we get: Did you mean that it happens even if you send the read urb after the control message? | Jun 1 20:23:55 localhost kernel: ------------[ cut here ]------------ | Jun 1 20:23:55 localhost kernel: kernel BUG at kernel/workqueue.c:110! | Jun 1 20:23:55 localhost kernel: invalid opcode: 0000 [#1] | Jun 1 20:23:55 localhost kernel: Modules linked in: ppp_deflate zlib_deflate bsd_comp ppp_async crc_ccitt ppp_generic slhc uhci_hcd ohci_hcd usbhid ipaq usbserial ehci_hcd usbcore tun 8139too mii sr_mod sbp2 scsi_mod ieee1394 psmouse ide_generic ide_cd cdrom genrtc ext3 jbd mbcache ide_disk generic via82cxxx ide_core evdev mousedev | Jun 1 20:23:55 localhost kernel: CPU: 0 | Jun 1 20:23:55 localhost kernel: EIP: 0060:[queue_work+23/47] Not tainted VLI | Jun 1 20:23:55 localhost kernel: EFLAGS: 00010a93 (2.6.17-rc4 #4) | Jun 1 20:23:55 localhost kernel: EIP is at queue_work+0x17/0x2f | Jun 1 20:23:55 localhost kernel: eax: c383113c ebx: b13f29c0 ecx: 00000000 edx: c3831138 | Jun 1 20:23:55 localhost kernel: esi: c44e8d60 edi: ca2f4814 ebp: 00000000 esp: c6bafeb8 | Jun 1 20:23:55 localhost kernel: ds: 007b es: 007b ss: 0068 | Jun 1 20:23:55 localhost kernel: Process khubd (pid: 1629, threadinfo=c6bae000 task=cbfd3a90) | Jun 1 20:23:55 localhost kernel: Stack: <0>c44e8d60 cc9bfad3 c3831000 ca2f4800 cc9bcb40 cc9bcb64 ca2f4814 cc9dd838 | Jun 1 20:23:55 localhost kernel: ca2f4800 ca2f487c ca2f4814 b01fb254 ca2f4814 ca2f4814 00000000 cc9f0ba0 | Jun 1 20:23:55 localhost kernel: b01fb419 ca2f4814 b01fac3d ca2f4814 ca2f485c ca2f4814 c5cc3858 00000000 | Jun 1 20:23:55 localhost kernel: Call Trace: | Jun 1 20:23:55 localhost kernel: <cc9bfad3> usb_serial_disconnect+0x59/0xa1 [usbserial] <cc9dd838> usb_unbind_interface+0x36/0x6f [usbcore] | Jun 1 20:23:55 localhost kernel: <b01fb254> __device_release_driver+0x5c/0x72 <b01fb419> device_release_driver+0x18/0x26 | Jun 1 20:23:55 localhost kernel: <b01fac3d> bus_remove_device+0x74/0x8c <b01fa0cc> device_del+0x39/0x65 | Jun 1 20:23:55 localhost kernel: <cc9dcaa1> usb_disable_device+0x6a/0xd4 [usbcore] <cc9d9225> usb_disconnect+0x7c/0xc9 [usbcore] | Jun 1 20:23:55 localhost kernel: <cc9d9f3d> hub_thread+0x35b/0x9eb [usbcore] <b0123f84> autoremove_wake_function+0x0/0x3a | Jun 1 20:23:55 localhost kernel: <b0123f36> kthread+0x80/0xc1 <cc9d9be2> hub_thread+0x0/0x9eb [usbcore] | Jun 1 20:23:55 localhost kernel: <b0123f4a> kthread+0x94/0xc1 <b0123eb6> kthread+0x0/0xc1 | Jun 1 20:23:55 localhost kernel: <b0101005> kernel_thread_helper+0x5/0xb | Jun 1 20:23:55 localhost kernel: Code: 89 d8 5b 5e 5f c3 89 d1 89 c2 a1 f4 71 32 b0 e9 86 ff ff ff 53 89 c3 0f ba 2a 00 19 c0 31 c9 85 c0 75 1c 8d 42 04 39 42 04 74 08 <0f> 0b 6e 00 64 61 27 b0 8b 03 e8 4a fc ff ff b9 01 00 00 00 5b | Jun 1 20:23:55 localhost kernel: EIP: [queue_work+23/47] queue_work+0x17/0x2f SS:ESP 0068:c6bafeb8 | | This seems to be 100% reproducible. I noticed that serial_open (in | usb-serial.c) sets port->tty = tty and tty->driver_data = port, but | doesn't set them back to NULL if the type->open() fails. Is that correct | ? I don't think it would cause the problem you're getting. 'port' is valid even if the driver's open() function fails. | Also, we have discovered that the slow response of the ipaq on connect | is actually largely caused by the control message retries, so we have | added a sleep at the start of ipaq_open. | | The current patch we are testing (not yet ready for inclusion, since | it doesn't work correctly yet and it produces some output that is not | useful in general) is : Well, I'm afraid that every new patch leads to a new problem.. Maybe it's something else.. -- Luiz Fernando N. Capitulino _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
