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block/raw-posix: avoid bogus fixup for cylinders on DASD disks

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large volume DASD that have > 64k cylinders do claim to have
0xFFFE cylinders as special value in the old 16 bit field. We
want to pass this "token" along to the guest, instead of
calculating the real number. Otherwise qemu might fail with
"cyls must be between 1 and 65535"

Cc: qemu-stable@nongnu.org
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Christian Borntraeger 2015-12-14 16:41:19 +01:00 committed by Kevin Wolf
parent 82dc8b4110
commit 972b543c6b
1 changed files with 0 additions and 7 deletions
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7
block/raw-posix.c
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@ -779,7 +779,6 @@ static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
{
BDRVRawState *s = bs->opaque;
struct hd_geometry ioctl_geo = {0};
uint32_t blksize;
/* If DASD, get its geometry */
if (check_for_dasd(s->fd) < 0) {
@ -799,12 +798,6 @@ static int hdev_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
}
geo->heads = ioctl_geo.heads;
geo->sectors = ioctl_geo.sectors;
if (!probe_physical_blocksize(s->fd, &blksize)) {
/* overwrite cyls: HDIO_GETGEO result is incorrect for big drives */
geo->cylinders = bdrv_nb_sectors(bs) / (blksize / BDRV_SECTOR_SIZE)
/ (geo->heads * geo->sectors);
return 0;
}
geo->cylinders = ioctl_geo.cylinders;
return 0;