Bug 11137 - oti6858 doesn't work at all and says "oti6858_read_int_callback(port = 0, status = 0)"
Summary: oti6858 doesn't work at all and says "oti6858_read_int_callback(port = 0, sta...
Status: RESOLVED INVALID
Alias: None
Product: Drivers
Classification: Unclassified
Component: USB (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Greg Kroah-Hartman
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-07-21 09:08 UTC by Marco Costantini
Modified: 2012-02-22 20:57 UTC (History)
0 users

See Also:
Kernel Version: 2.6.26-1
Subsystem:
Regression: No
Bisected commit-id:

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Description Marco Costantini 2008-07-21 09:08:05 UTC 
Latest working kernel version: never worker for me
Earliest failing kernel version: 
Distribution: Ubuntu 8.04.1 hardy

Hardware Environment: the usb-to-serial cable 0ea0:6858 Ours Technology, Inc.
Software Environment: Linux 2.6.26-1-generic #1 SMP Fri Jun 13 13:24:46 UTC 2008 x86_64 GNU/Linux

Problem Description:
The driver for this cable doesn't work at all. When I insert the cable, I get with dmesg:

[279996.214432] usb 1-1: new full speed USB device using ohci_hcd and address 4
[279996.427344] usb 1-1: configuration #1 chosen from 1 choice
[279996.888068] usbcore: registered new interface driver usbserial
[279996.891909] usbserial: USB Serial support registered for generic
[279996.895286] usbcore: registered new interface driver usbserial_generic
[279996.895291] usbserial: USB Serial Driver core
[279996.915471] usbserial: USB Serial support registered for oti6858
[279996.916423] oti6858 1-1:1.0: oti6858 converter detected
[279996.920178] usb 1-1: oti6858 converter now attached to ttyUSB0
[279996.923301] usbcore: registered new interface driver oti6858

lsmod lists:
oti6858                23428  0
usbserial              44144  1 oti6858

When I try to use the tty port provided by this cable, nothing works, and with dmesg I get a lot of messages like:
[280403.640688] oti6858_read_int_callback(port = 0, status = 0)
[280403.643886] oti6858_read_int_callback(port = 0, status = 0)
[280403.644685] oti6858_read_int_callback(port = 0, status = 0)
[280403.647887] oti6858_read_int_callback(port = 0, status = 0)
[280403.648686] oti6858_read_int_callback(port = 0, status = 0)
[280403.651879] oti6858_read_int_callback(port = 0, status = 0)
[280403.652685] oti6858_read_int_callback(port = 0, status = 0)

See also https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/77825

Steps to reproduce: For me, this happens always if I try to use this cable with any application, such as kmobiletools, that uses the serial tty port.
Comment 1 Greg Kroah-Hartman 2012-02-22 20:57:33 UTC 
All USB bugs should be sent to the linux-usb@vger.kernel.org mailing 
list, and not entered into bugzilla.  Please bring this issue up there,
if it is still a problem in the latest kernel release.
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