Re: [PATCH #upstream-fixes] libata: disable ATAPI AN by default

[Jeff Garzik <jeff@garzik.org>]

On 05/19/2010 09:38 AM, Tejun Heo wrote:
> There are ATAPI devices which raise AN when hit by commands issued by
> open().  This leads to infinite loop of AN ->  MEDIA_CHANGE uevent ->
> udev open() to check media ->  AN.
>
> Both ACS and SerialATA standards don't define in which case ATAPI
> devices are supposed to raise or not raise AN.  They both list media
> insertion event as a possible use case for ATAPI ANs but there is no
> clear description of what constitutes such events.  As such, it seems
> a bit too naive to export ANs directly to userland as MEDIA_CHANGE
> events without further verification (which should behave similarly to
> windows as it apparently is the only thing that some hardware vendors
> are testing against).

Windows completely disables AN?

Or do we simply need to be less naive about _delivery_ of AN's?

	Jeff