diff options
Diffstat (limited to 'hw/scsi/scsi-disk.c')
| -rw-r--r-- | hw/scsi/scsi-disk.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index 3027ac3b1e..efee6739f9 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -1591,7 +1591,7 @@ static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf) int cmd = r->req.cmd.buf[0]; int len = r->req.cmd.xfer; int hdr_len = (cmd == MODE_SELECT ? 4 : 8); - int bd_len; + int bd_len, bs; int pass; if ((r->req.cmd.buf[1] & 0x11) != 0x10) { @@ -1617,9 +1617,19 @@ static void scsi_disk_emulate_mode_select(SCSIDiskReq *r, uint8_t *inbuf) } /* Allow changing the block size */ - if (bd_len && p[6] != (s->qdev.blocksize >> 8)) { - s->qdev.blocksize = p[6] << 8; - trace_scsi_disk_mode_select_set_blocksize(s->qdev.blocksize); + if (bd_len) { + bs = p[5] << 16 | p[6] << 8 | p[7]; + + /* + * Since the existing code only checks/updates bits 8-15 of the block + * size, restrict ourselves to the same requirement for now to ensure + * that a block size set by a block descriptor and then read back by + * a subsequent SCSI command will be the same + */ + if (bs && !(bs & ~0xff00) && bs != s->qdev.blocksize) { + s->qdev.blocksize = bs; + trace_scsi_disk_mode_select_set_blocksize(s->qdev.blocksize); + } } len -= bd_len; |