IOServiceGetMatchingServices() doesn't find driver

• Subject: IOServiceGetMatchingServices() doesn't find driver
• From: "Brian Jorgage" <email@hidden>
• Date: Mon, 31 Jan 2005 17:12:35 -0500
• Delivered-to: email@hidden
• Delivered-to: email@hidden

I am following the example tutorial in "Writing an I/O Kit Device 
Driver".  I create a matching dictionary via IOServiceMatching
(myDriver).  When I verify the contents of the dictionary the (only) 
key-value pair is "IOProviderClass:<myDriver>".

Shouldn't the key part of this be "IOClass" rather 
than "IOProviderClass" ?  By using IOServiceMatching() it seems I am 
locking myself in to using the "IOProviderClass" key.

If instead I use the call IOServiceMatching("AppleUSBComposite") to 
find an Apple driver then IOServiceGetMatchingServices() still doesn't 
find anything.  However I know there are instances of AppleUSBComposite 
which I can verify via IORegistryExplorer.

So what gives here ?

Brian Jorgage



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