Kristen Carlson Accardi wrote:

Check to see if an ATAPI device supports Asynchronous Notification.
If so, enable it.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
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Andrew, I cleaned up the function header to properly comply with kernel
doc requirements.  Other than that, this patch is the same.  

I would ask for a simple revision:  update ata_dev_set_AN() such that it 
takes a second argument 'enable'.  This boolean indicates to the 
function whether SETFEATURES_SATA_ENABLE or SETFEATURES_SATA_DISABLE 
should be passed to the device.

Otherwise than that, it's ready to merge I would say.