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SCSI divide capacity by s->cluster_size (Rik van Riel)

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Paul Brook pointed out that the number of sectors reported
by the SCSI read capacity commands needs to be divided by
s->cluster_size, because bdrv_get_geometry reports the number
of 512 byte sectors, while emulated CDROMs report 2048 byte
sectors back to the guest.

This has no consequences for emulated hard disks, which use
a cluster size of 1.

aliguori: fixed typo

Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6469 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-01-28 21:58:29 +00:00
parent 86106e5920
commit c1c0438c80
1 changed files with 2 additions and 0 deletions
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2
hw/scsi-disk.c
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@ -734,6 +734,7 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
/* The normal LEN field for this command is zero. */
memset(outbuf, 0, 8);
bdrv_get_geometry(s->bdrv, &nb_sectors);
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
if (nb_sectors) {
nb_sectors--;
@ -834,6 +835,7 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
DPRINTF("SAI READ CAPACITY(16)\n");
memset(outbuf, 0, len);
bdrv_get_geometry(s->bdrv, &nb_sectors);
nb_sectors /= s->cluster_size;
/* Returned value is the address of the last sector. */
if (nb_sectors) {
nb_sectors--;