ide-gd: implement block device ->set_capacity method (v2)
* Use ->probed_capacity to store native device capacity for ATA disks.
* Add ->set_capacity method to struct ide_disk_ops.
* Implement disk device ->set_capacity method for ATA disks.
* Implement block device ->set_capacity method.
v2:
* Check if LBA and HPA are supported in ide_disk_set_capacity().
* According to the spec the SET MAX ADDRESS command shall be
immediately preceded by a READ NATIVE MAX ADDRESS command.
* Add ide_disk_hpa_{get_native,set}_capacity() helpers.
Together with the previous patch adding ->set_capacity block device
method this allows automatic disabling of Host Protected Area (HPA)
if any partitions overlapping HPA are detected.
Cc: Robert Hancock <hancockrwd@gmail.com>
Cc: Frans Pop <elendil@planet.nl>
Cc: "Andries E. Brouwer" <Andries.Brouwer@cwi.nl>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Emphatically-Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 4b6b71e..2141190 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -287,6 +287,19 @@
return ret;
}
+static unsigned long long ide_gd_set_capacity(struct gendisk *disk,
+ unsigned long long capacity)
+{
+ struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
+ ide_drive_t *drive = idkp->drive;
+ const struct ide_disk_ops *disk_ops = drive->disk_ops;
+
+ if (disk_ops->set_capacity)
+ return disk_ops->set_capacity(drive, capacity);
+
+ return drive->capacity64;
+}
+
static int ide_gd_revalidate_disk(struct gendisk *disk)
{
struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
@@ -315,6 +328,7 @@
.locked_ioctl = ide_gd_ioctl,
.getgeo = ide_gd_getgeo,
.media_changed = ide_gd_media_changed,
+ .set_capacity = ide_gd_set_capacity,
.revalidate_disk = ide_gd_revalidate_disk
};