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List:       haiku-bugs
Subject:    Re: [Haiku-bugs] [Haiku] #1044: USB OHCI support
From:       "mmlr" <trac () haiku-os ! org>
Date:       2008-07-24 21:33:59
Message-ID: 054.5fcdd2fe8c355e9f9c3316de191cedc3 () haiku-os ! org
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#1044: USB OHCI support
--------------------------+-------------------------------------------------
  Reporter:  wkornewald   |       Owner:  mmlr          
      Type:  enhancement  |      Status:  closed        
  Priority:  blocker      |   Milestone:  R1/alpha1     
 Component:  Drivers/USB  |     Version:  R1 development
Resolution:  fixed        |   Blockedby:                
  Platform:  All          |    Blocking:                
--------------------------+-------------------------------------------------
Changes (by mmlr):

  * status:  assigned => closed
  * resolution:  => fixed


Comment:

 No, the KDLs you get this way are perfectly valid. What you do is actively
 destructive. When it says it could not write back blocks it actually means
 that you just lost data. A removed device will cause an unmount, as
 expected, but if there is still unflushed data, a KDL is fine (for now,
 later for a release it will probably just put the warnings into syslog or
 pop up an alert). The system cannot know when you are about to unplug the
 device and therefore it has no way to write the changes back in time
 (later on we will want to support aggressive write back for removable
 devices to minimize the impact, however it will never be safe to surprise
 remove a mounted media). As soon as you unplugged the device it is pretty
 much too late. Therefore always unmount your volumes (unless they are
 mounted read-only) before unplugging the media. Anyway this is not a USB
 or usb_disk issue as they seem to work as expected, that is the devices
 are working and the unplug triggers an unmount.
 [[BR]]
 [[BR]]
 Closing this ticket as OHCI works now to the required level. Missing is
 the isochronous support, which is tracked for OHCI and EHCI in ticket
 #1045. If anyone encounters bugs in OHCI, please open new tickets for
 them.

-- 
Ticket URL: <http://dev.haiku-os.org/ticket/1044#comment:57>
Haiku <http://dev.haiku-os.org>
The Haiku operating system.
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