Bug 6510

Summary: hp4x serial usb driver stopped working with 2.6.16
Product: Drivers Reporter: Samuel Thibault (samuel.thibault)
Component: USBAssignee: Greg Kroah-Hartman (greg)
Status: CLOSED PATCH_ALREADY_AVAILABLE    
Severity: normal    
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.16 Subsystem:
Regression: --- Bisected commit-id:
Bug Depends on:    
Bug Blocks: 5089    
Attachments: dmesg of lsusb + minicom try
lsusb

Description Samuel Thibault 2006-05-07 18:51:43 UTC 
Most recent kernel where this bug did not occur: 2.6.15
Distribution: debian
Hardware Environment: USB 1.1 hub
Software Environment: cat/minicom
Problem Description:
character transfer between pc and hp4x stopped working with kernel 2.6.16

Steps to reproduce:
plug hp4x device (it is properly recognized), start minicom, type characters in minicom or on hp4x, nothing appears on the other side.  With 2.6.15 it works ok.

I enabled debugging in the module, and I'll attach lsusb + dmesg
Note that the USBDEVFS_CONTROL errors in dmesg correspond to the "cannot read device status" error in lsusb
Comment 1 Samuel Thibault 2006-05-07 18:53:03 UTC 
Created attachment 8034 [details]
dmesg of lsusb + minicom try
Comment 2 Samuel Thibault 2006-05-07 18:53:31 UTC 
Created attachment 8035 [details]
lsusb
Comment 3 Samuel Thibault 2006-05-07 18:54:28 UTC 
*** Bug 6509 has been marked as a duplicate of this bug. ***
Comment 4 Greg Kroah-Hartman 2006-05-08 09:39:42 UTC 
I don't see anything wrong with that kernel log, what are you seeing
happening?  I see the data go to the device successfully, and that's about it.
Comment 5 Samuel Thibault 2006-05-08 09:48:50 UTC 
Indeed, data seems to go, but the device doesn't get it at all. And in the first part of the log (where it looks like the device is idle), I was actually typing data from the device to the computer (which it apparently never received).
Comment 6 Greg Kroah-Hartman 2006-08-30 00:58:27 UTC 
Is this fixed in the latest 2.6.18-rc5 release?
Comment 7 Samuel Thibault 2006-08-30 13:06:27 UTC 
2.6.18-rc5 works fine indeed, thanks!