On 04/15/15 08:39, Eugene M. Zheganin wrote:
Hi.

I'm using the cardreader sometimes. The bad thing is that it's plugged
in the server. Yesterday someone replugged it, now the usb bus, as
camcontrol sees it, always shows an error:

[root@moscow-alpha:~]# camcontrol rescan all
Re-scan of bus 0 was successful
Re-scan of bus 1 was successful
Re-scan of bus 2 was successful
Re-scan of bus 3 was successful
Re-scan of bus 4 was successful
Re-scan of bus 5 was successful
Re-scan of bus 6 returned error 0xa

and the usbconfig just hangs.

Is there something I can do besides rebooting the server ?
Looks like a bug to me.


Hi,

If you use KGDB and dump all threads, and look for usb_ or usbd_ , then probably you'll see who is waiting for what. Typically most of these problems reside in the CAM / SCSI layer, which does not release all reference counts when the device is going away.

--HPS

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