Re: [34-stable regression] USB delay init quirk causes device events loss

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 09/13/2010 04:16 PM, Alan Stern wrote:
> On Mon, 13 Sep 2010, Jiri Slaby wrote:
>> The problem is that the patch shuffles with usb_detect_quirks which used
>> to disable autosuspend by default. Apparently it no longer does.
> 
> I don't see how that patch could have the effect you claim.  
> usb_detect_quirks still calls usb_disable_autosuspend.  Can you do a 
> little more debugging to find out why it isn't working as expected?  
> Reverting the commit is not a good solution.

Ok, I could, but I have a near-zero knowledge about usb core stuff. What
I see is that usb_detect_quirks moved from usb_new_device to
hub_port_connect_change. Might that be that there are broken devices
which doesn't generate state changes properly?

In other words, what I could do is to add some printks into
hub_port_connect_change if that's called at all. If you need some
thorough debugging printks, please send me a patch to test instead.

thanks,
-- 
js
suse labs
--
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


[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux