Diego M. Vadell wrote:
On Monday 13 June 2005 14:59, you wrote:
The task is to update sata_nv to notify libata-core that a device has
disappeared. libata-core then notifies the SCSI layer of this. No new
ioctls need to be supported.
Jeff
Hi Jeff,
Thank you for your answers. Reading a little of
http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/libata.pdf and
drivers/scsi/sata_nv.c , it seems to me that I have to add a call to
ata_port_disable() into sata_nv.c:nv_check_hotplug().
In sata_nv.c , nv_check_hotplug() is called from nv_interrupt() , which
seems to be the interrupt handler. I add the call to ata_port_disable(ap) ,
taking ap from the ata_host_set structure, but that structure seems to be
able to have many ap ports (its an array).
Question: is it ok to set ap as host_set->ports[0] or should I have to see
what ata_port is the one that has been unplugged?
You need to go into the SCSI layer and figure out how to do it.
Calling scsi_remove_device() in the appropriate place is a good start.
Add a debounce timer. Make sure all commands are completed with an
error (avoids memory leaks and lock-ups). Other details.
Hot unplug is not just a simple function call...
Jeff
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