On Wed, 2003-08-13 at 05:30, David Brownell wrote:
> Warren Togami wrote:
>
> > Configuration:
> > bLength = 9
> > bDescriptorType = 02
> > wTotalLength = 0022
> > bNumInterfaces = 01
> > bConfigurationValue = 00
> > iConfiguration = 00
> > bmAttributes = a0
> > bMaxPower = 100mA
>
> Thanks for that info. It confirms what I expected: this
> device violates the USB specification. That's interesting
> to know. This particular violation doesn't seem common,
> since yours is the first report of this error. And it
> should be one we can turn into a "don't care".
>
>
> > Please instruct me about what to do next.
>
> Let us know if you can use the device after applying
> this patch! If it does, I'll ask Greg to merge it.
>
> - Dave
>
>
>
> ______________________________________________________________________
> --- 1.34/drivers/usb/core/message.c Mon Aug 11 07:56:25 2003
> +++ edited/drivers/usb/core/message.c Wed Aug 13 08:26:45 2003
> @@ -1053,10 +1053,18 @@
> break;
> }
> }
> - if ((!cp && configuration != 0) || (cp && configuration == 0)) {
> - warn("selecting invalid configuration %d", configuration);
> + if (!cp && configuration != 0) {
> + dev_dbg(&dev->dev, "selecting invalid configuration %d\n",
> + configuration);
> return -EINVAL;
> }
> +
> + /* the usb spec defines config zero as meaning the device is in
> + * ADDRESS state; otherwise it's CONFIGURED. but at least one
> + * usb 1.1 mouse (062a:0000 v2.4) won't even try to fake it.
> + */
> + if (cp && configuration == 0)
> + dev_warn(&dev->dev, "illegal descriptors, for config #0\n");
>
> /* if it's already configured, clear out old state first. */
> if (dev->state != USB_STATE_ADDRESS)
I tested this patch on kernel-2.6.0-test3 and this happens when I plug
in the "CompUSA Optical USB Notebook Mouse".
hub 1-0:0: debounce: port 2: delay 100ms stable 4 status 0x301
hub 1-0:0: new USB device on port 2, assigned address 5
usb 1-2: illegal descriptors, for config #0
drivers/usb/core/message.c: error getting string descriptor 0
(error=-75)
Then it seems that all USB devices seize to function, including my
Logitech USB keyboard. If I am not in X I am able to use my laptop's
internal PS/2 keyboard to poweroff. If I am in X it freezes completely.
Any other suggestions?
Warren Togami
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