Re: [BUG] USB input death then system freeze
Jiri Kosina <[email protected]>
| Newsgroups | gmane.linux.usb.devel,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 24 May 2007, Nicolas Mailhot wrote: > Most recent kernel where this bug did *NOT* occur: pre 2.6.21 mm > kernels, non-mm 2.6.22-rc2 > Distribution: Fedora Devel > Hardware Environment: EHCI input on external powered hub with CK804 mainboard > Software Environment: Nothing specific > Problem Description: > After a few hours of activity 2.6.22-rc1-mm1 and 2.6.22-rc2-mm1 will lose USB > HID INPUT (keyboard or mice with no priority), then the system will freeze > drivers/hid/usbhid/hid-core.c: input irq status -75 received This is now handled in bugzilla [1]. Zan Lynx also reported this problem, and from the HID_DEBUG output he provided is evident that it is caused by HID layer receiving a report of size 4294967284 (which corresponds to urb->actual_length of the URB received from USB core). Alan Stern suggested to reproduce the bug with CONFIG_USB_DEBUG and also collect the usbmon trace, so that we can clearly understand what happens. I am now inclined to think that this is caused by USB core messing up the URB somehow, HID core seems to receive the URB with already bogus values. [1] http://bugzilla.kernel.org/show_bug.cgi?id=8535 Thanks, -- Jiri Kosina ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel