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SCSI: implement sd_unlock_native_capacity()

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Implement sd_unlock_native_capacity() method which calls into
hostt->unlock_native_capacity() if implemented.  This will be invoked
by block layer if partitions extend beyond the end of the device and
can be used to implement, for example, on-demand ATA host protected
area unlocking.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo
2010-05-15 20:09:32 +02:00
committed by Jeff Garzik
parent ed4e2f801c
commit 72ec24bd77
2 changed files with 30 additions and 0 deletions
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8
include/scsi/scsi_host.h
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@@ -326,6 +326,14 @@ struct scsi_host_template {
int (* bios_param)(struct scsi_device *, struct block_device *,
sector_t, int []);
/*
* This function is called when one or more partitions on the
* device reach beyond the end of the device.
*
* Status: OPTIONAL
*/
void (*unlock_native_capacity)(struct scsi_device *);
/*
* Can be used to export driver statistics and other infos to the
* world outside the kernel ie. userspace and it also provides an