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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-07 15:52:52 +0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-07 15:52:52 +0400
commite957b60d1583022a0f7c03267d37fcae2ddb78b1 (patch)
tree5e9518eb38d427b9ac41c9b90b31b9b2453aebfc /drivers/ide/ide-gd.c
parentdb429e9ec0f9dee2d8e50c154f04f29f880fc9d6 (diff)
downloadlinux-e957b60d1583022a0f7c03267d37fcae2ddb78b1.tar.xz
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>
Diffstat (limited to 'drivers/ide/ide-gd.c')
-rw-r--r--drivers/ide/ide-gd.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 4b6b71e2cdf5..214119026b3f 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -287,6 +287,19 @@ static int ide_gd_media_changed(struct gendisk *disk)
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 @@ static struct block_device_operations ide_gd_ops = {
.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
};