On Wed, 13 Oct 2010, Florian Echtler wrote: > > It would be good to start by finding out where the -EIO error comes > > from. One likely candidate is where > > drivers/hid/usbhid/hid-core.c:hid_suspend() calls usbhid_wait_io(). Is > > that the source of the error? Does the wait_event_timeout() call > > actually time out? Since the posted dmesg log was made without > > CONFIG_PRINTK_TIME, we can't see if there really was a 10-second delay. > Sorry, my mistake: > > [ 226.288305] usbhid 2-1.8:1.1: suspend error -5 > [ 226.288316] pm_op(): usb_dev_suspend+0x0/0x20 returns -5 > [ 226.288321] PM: Device 2-1.8 failed to suspend async: error -5 > [ 226.288426] PM: Some devices failed to suspend > > So no noticeable delay here. If there was a delay, it would occur just prior to the first line above. So you can't tell from this extract whether or not the timeout expired. > Interestingly, however, there's a > significant delay when loading the driver: > > [ 895.253903] ntrig 0003:1B96:0001.0003: hidraw2: USB HID v1.10 Device > [N-trig DuoSense] on usb-0000:00:1d.0-1.8/input0 > [ 895.254142] ntrig 0003:1B96:0001.0003: Firmware version: 4.8.15.20.7 > (2108 8fe2) > [ 895.255956] /build/buildd/linux-2.6.35/drivers/hid/usbhid/hid-core.c: > submitting ctrl urb: Get_Report wValue=0x0101 wIndex=0x0001 wLength=10 > [ 905.228517] /build/buildd/linux-2.6.35/drivers/hid/usbhid/hid-core.c: > timeout waiting for ctrl or out queue to clear > [ 905.228719] /build/buildd/linux-2.6.35/drivers/hid/usbhid/hid-core.c: > submitting ctrl urb: Get_Report wValue=0x0103 wIndex=0x0001 wLength=94 > [ 905.228732] /build/buildd/linux-2.6.35/drivers/hid/usbhid/hid-core.c: > usb_submit_urb(ctrl) failed > [ 905.228754] ntrig 0003:1B96:0001.0004: timeout initializing reports Just guessing, this may indicate that the device needs to have the HID_QUIRK_NOGET quirk. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
