Re: usbmc seems broken

[Neil Kalo]

Upgraded to: 2.6.32.7-37.fc12.i686.PAE

Still no joy. Plugging in the meter gives:

Feb  4 08:27:04 localhost kernel: usb 4-1: new full speed USB device
using ohci_hcd and address 2
Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device found,
idVendor=05e6, idProduct=2100
Feb  4 08:27:04 localhost kernel: usb 4-1: New USB device strings:
Mfr=2, Product=3, SerialNumber=1
Feb  4 08:27:04 localhost kernel: usb 4-1: Product: 2100 Multimeter
Feb  4 08:27:04 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
Feb  4 08:27:04 localhost kernel: usb 4-1: SerialNumber: 1160791
Feb  4 08:27:04 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
Feb  4 08:27:04 localhost kernel: usbcore: registered new interface
driver usbtmc

But "cat /dev/usbtmc0" gives:
cat: /dev/usbtmc0: Connection timed out

And in the logs:
Feb  4 08:27:35 localhost kernel: usbtmc 4-1:1.0: Unable to read data,
error -110

The very old driver still works:

Feb  4 08:31:02 localhost kernel: USBTMC: MKDEV
Feb  4 08:31:02 localhost kernel: USBTMC: CDEV_ADD f900000 1
Feb  4 08:31:02 localhost kernel: usbcore: registered new interface
driver USBTMC

[root@mc22 usbtmc-module]# cat /dev/usbtmc0
Minor Number    Manufacturer    Product Serial Number
001     KEITHLEY INSTRUMENTS    2100 Multimeter 1160791

On Wed, Jan 27, 2010 at 1:59 AM, Greg KH <greg@xxxxxxxxx> wrote:
> On Tue, Jan 26, 2010 at 05:01:25PM -0800, Andrew Morton wrote:
>> (cc's added)
>>
>> On Fri, 22 Jan 2010 16:40:06 +0000
>> Neil Kalo <neilkalo@xxxxxxxxx> wrote:
>>
>> > I cannot get usbtmc to work with my device. I am using fedora 12:
>> > 2.6.31.12-174.2.3.fc12.i686.PAE
>> >
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: new full speed USB device
>> > using ohci_hcd and address 4
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device found,
>> > idVendor=05e6, idProduct=2100
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: New USB device strings:
>> > Mfr=2, Product=3, SerialNumber=1
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: Product: 2100 Multimeter
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: Manufacturer: KEITHLEY INSTRUMENTS
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: SerialNumber: 1160791
>> > Jan 22 15:40:26 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
>> > Jan 22 15:40:26 localhost kernel: usbtmc 4-1:1.0: can't read capabilities
>
> This was a bug in this version of the driver.
>
> Please upgrade to 2.6.32, the problem is fixed.
>
> If you are curious, commit id d0a38365d9585bf3fb71f7c57fd532441a14f3e8
> solved the problem.
>
> Hope this helps,
>
> greg k-h
>
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