We received the following problem about usb-serial in 2.6.26. Is this a known issue?
* [EMAIL PROTECTED] <[EMAIL PROTECTED]> [2008-08-30 20:33]: > Hi all, > > yesterday I did an "apt-get dist-upgrade" on my NSLU2 running Debian lenny > (armel version). Now I have kernel 2.6.26-1-ixp4xx. > > I'm using an USB-to-Serial adapter based on the pl2303 chipset, which has > been working flawlessly with all previous versions of Debian I had > installed on that NSLU2. Now I get repeated errors on this interface, with > error messages in syslog like these: > > Aug 30 20:20:06 slug kernel: [43051075.690000] ------------[ cut here > ]------------ > Aug 30 20:20:06 slug kernel: [43051075.690000] WARNING: at > drivers/usb/serial/usb-serial.c:322 serial_write_room+0x50/0x7c > [usbserial]() > Aug 30 20:20:06 slug kernel: [43051075.700000] Modules linked in: evdev > pl2303 ixp4xx_beeper ixp4xx_eth ixp4xx_npe firmware_class ixp4xx_qmgr > usbserial ext3 jbd mbcache sd_mod usb_storage scsi_mod ohci_hcd ehci_hcd > usbcore > Aug 30 20:20:06 slug kernel: [43051075.720000] [<c0029f74>] > (dump_stack+0x0/0x14) from [<c003e6bc>] (warn_on_slowpath+0x4c/0x84) > Aug 30 20:20:06 slug kernel: [43051075.730000] [<c003e670>] > (warn_on_slowpath+0x0/0x84) from [<bf09d4d0>] (serial_write_room+0x50/0x7c > [usbserial]) > Aug 30 20:20:06 slug kernel: [43051075.740000] r6:c0950400 r5:00000043 > r4:c1c4b000 > Aug 30 20:20:06 slug kernel: [43051075.740000] [<bf09d480>] > (serial_write_room+0x0/0x7c [usbserial]) from [<c01531e8>] > (tty_write_room+0x24/0x30) > Aug 30 20:20:06 slug kernel: [43051075.750000] r4:c0950400 > Aug 30 20:20:06 slug kernel: [43051075.760000] [<c01531c4>] > (tty_write_room+0x0/0x30) from [<c015107c>] (opost+0x1c/0x1b0) > Aug 30 20:20:06 slug kernel: [43051075.760000] [<c0151060>] > (opost+0x0/0x1b0) from [<c0151278>] (echo_char+0x68/0x70) > Aug 30 20:20:06 slug kernel: [43051075.770000] r5:c0950400 r4:00000043 > Aug 30 20:20:06 slug kernel: [43051075.780000] [<c0151210>] > (echo_char+0x0/0x70) from [<c0152720>] (n_tty_receive_buf+0xb88/0xe08) > Aug 30 20:20:06 slug kernel: [43051075.780000] r5:c0950c00 r4:00000043 > Aug 30 20:20:06 slug kernel: [43051075.790000] [<c0151b98>] > (n_tty_receive_buf+0x0/0xe08) from [<c014e70c>] > (flush_to_ldisc+0xdc/0x174) > Aug 30 20:20:06 slug kernel: [43051075.800000] [<c014e630>] > (flush_to_ldisc+0x0/0x174) from [<c004ea70>] (run_workqueue+0xbc/0x150) > Aug 30 20:20:06 slug kernel: [43051075.810000] r8:00000000 r7:00000000 > r6:c014e630 r5:c1c26000 r4:c1c01940 > Aug 30 20:20:06 slug kernel: [43051075.810000] [<c004e9b4>] > (run_workqueue+0x0/0x150) from [<c004f524>] (worker_thread+0xa8/0xbc) > Aug 30 20:20:06 slug kernel: [43051075.820000] r6:c004f47c r5:c1c01940 > r4:c1c01948 > Aug 30 20:20:06 slug kernel: [43051075.830000] [<c004f47c>] > (worker_thread+0x0/0xbc) from [<c0052588>] (kthread+0x5c/0x94) > Aug 30 20:20:06 slug kernel: [43051075.840000] r5:c1c01940 r4:c1c26000 > Aug 30 20:20:06 slug kernel: [43051075.840000] [<c005252c>] > (kthread+0x0/0x94) from [<c00419b0>] (do_exit+0x0/0x6a4) > Aug 30 20:20:06 slug kernel: [43051075.850000] r6:00000000 r5:00000000 > r4:00000000 > Aug 30 20:20:06 slug kernel: [43051075.850000] ---[ end trace > 28dbfda44f8c329c ]--- > Aug 30 20:20:06 slug kernel: [43051075.860000] ------------[ cut here > ]------------ > Aug 30 20:20:06 slug kernel: [43051075.860000] WARNING: at > drivers/usb/serial/usb-serial.c:309 serial_write+0x74/0xac [usbserial]() > Aug 30 20:20:06 slug kernel: [43051075.870000] Modules linked in: evdev > pl2303 ixp4xx_beeper ixp4xx_eth ixp4xx_npe firmware_class ixp4xx_qmgr > usbserial ext3 jbd mbcache sd_mod usb_storage scsi_mod ohci_hcd ehci_hcd > usbcore > Aug 30 20:20:06 slug kernel: [43051075.890000] [<c0029f74>] > (dump_stack+0x0/0x14) from [<c003e6bc>] (warn_on_slowpath+0x4c/0x84) > Aug 30 20:20:06 slug kernel: [43051075.900000] [<c003e670>] > (warn_on_slowpath+0x0/0x84) from [<bf09d570>] (serial_write+0x74/0xac > [usbserial]) > Aug 30 20:20:06 slug kernel: [43051075.910000] r6:c1c27e5f r5:00000001 > r4:c1c4b000 > Aug 30 20:20:06 slug kernel: [43051075.910000] [<bf09d4fc>] > (serial_write+0x0/0xac [usbserial]) from [<c014cdc8>] > (tty_put_char+0x40/0x48) > Aug 30 20:20:06 slug kernel: [43051075.920000] r6:c0950400 r5:00000043 > r4:c0950400 > Aug 30 20:20:06 slug kernel: [43051075.930000] [<c014cd88>] > (tty_put_char+0x0/0x48) from [<c01511e4>] (opost+0x184/0x1b0) > Aug 30 20:20:06 slug kernel: [43051075.940000] [<c0151060>] > (opost+0x0/0x1b0) from [<c0151278>] (echo_char+0x68/0x70) > Aug 30 20:20:06 slug kernel: [43051075.950000] r5:c0950400 r4:00000043 > Aug 30 20:20:06 slug kernel: [43051075.950000] [<c0151210>] > (echo_char+0x0/0x70) from [<c0152720>] (n_tty_receive_buf+0xb88/0xe08) > Aug 30 20:20:06 slug kernel: [43051075.960000] r5:c0950c00 r4:00000043 > Aug 30 20:20:06 slug kernel: [43051075.960000] [<c0151b98>] > (n_tty_receive_buf+0x0/0xe08) from [<c014e70c>] > (flush_to_ldisc+0xdc/0x174) > Aug 30 20:20:06 slug kernel: [43051075.970000] [<c014e630>] > (flush_to_ldisc+0x0/0x174) from [<c004ea70>] (run_workqueue+0xbc/0x150) > Aug 30 20:20:06 slug kernel: [43051075.980000] r8:00000000 r7:00000000 > r6:c014e630 r5:c1c26000 r4:c1c01940 > Aug 30 20:20:06 slug kernel: [43051075.990000] [<c004e9b4>] > (run_workqueue+0x0/0x150) from [<c004f524>] (worker_thread+0xa8/0xbc) > Aug 30 20:20:06 slug kernel: [43051076.000000] r6:c004f47c r5:c1c01940 > r4:c1c01948 > Aug 30 20:20:06 slug kernel: [43051076.000000] [<c004f47c>] > (worker_thread+0x0/0xbc) from [<c0052588>] (kthread+0x5c/0x94) > Aug 30 20:20:06 slug kernel: [43051076.010000] r5:c1c01940 r4:c1c26000 > Aug 30 20:20:06 slug kernel: [43051076.020000] [<c005252c>] > (kthread+0x0/0x94) from [<c00419b0>] (do_exit+0x0/0x6a4) > Aug 30 20:20:06 slug kernel: [43051076.020000] r6:00000000 r5:00000000 > r4:00000000 > Aug 30 20:20:06 slug kernel: [43051076.030000] ---[ end trace > 28dbfda44f8c329c ]--- > > These errors happen at irregular intervals, in between the serial > communication works ok. I don't know how to interpret the error messages. > Is this a known problem, and what can I do about it? > > Please let me know if more detailed information is necessary to track down > this problem. > > Regards, Richard > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] -- Martin Michlmayr http://www.cyrius.com/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
