Messages in this thread | | | Date | Wed, 28 Mar 2007 22:02:12 -0400 | From | Jeff Garzik <> | Subject | Re: [patch 1/3] libata: check for AN support |
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Tejun Heo wrote: > Kristen Carlson Accardi wrote: >> Check to see if an ATAPI device supports Asynchronous Notification. >> If so, enable it. > > As supporting AN needs host interrupt handler change. I think we need > host-supports-AN flag; otherwise, we might end up with screaming > interrupts in the worst case.
Quite so. Lacking a host flag, we need to know how each and every controller behaves when AN is activated (and supported by the device). I'm willing to bet some of the first-gen SATA controllers' ASIC state machines croak when AN is activated.
Jeff
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