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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-06-07 13:52:52 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-06-07 13:52:52 +0200 |
| commit | e957b60d1583022a0f7c03267d37fcae2ddb78b1 (patch) | |
| tree | 5e9518eb38d427b9ac41c9b90b31b9b2453aebfc /drivers/ide/ide-gd.c | |
| parent | partitions: add ->set_capacity block device method (diff) | |
| download | linux-e957b60d1583022a0f7c03267d37fcae2ddb78b1.tar.xz linux-e957b60d1583022a0f7c03267d37fcae2ddb78b1.zip | |
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.c | 14 |
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 }; |