#5395 NORM Never A: evdev runs out of minors

[Zarro Boogs per Child]

#5395: evdev runs out of minors
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 Reporter:  JordanCrouse  |       Owner:  dilinger      
     Type:  defect        |      Status:  new           
 Priority:  normal        |   Milestone:  Never Assigned
Component:  kernel        |     Version:                
 Keywords:                |    Verified:  0             
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 Leaving a USB keyboard or mouse plugged into the XO, suspend and resume
 many times.  On each resume, the USB input devices are allocated a new
 input device with an incrementing minor.  Eventually, as the new devices
 are attached, evdev starts returning errors when it runs out of minors
 (see attached dmesg).  Reviewing the code confirms that evdev has only 32
 slots, and that the errors start occuring right about when /dev/input32 is
 created.

 Checking the source code, it appears that evdev_detach is being correctly
 called (and the input device shut down), but the device is not being
 closed (evdev_release is not being called), so eventually the driver runs
 out of slots, because nothing ever goes away.

 This was noticed on ship.2, but presumably its been there for a while now.

 Assigning to Andres to start, but this could end up in X, so CCing the X
 folks too

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Ticket URL: <http://dev.laptop.org/ticket/5395>
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