diff options
| -rw-r--r-- | hw/scsi/lsi53c895a.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index 71f759a59d..eb9828dd5e 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -927,13 +927,18 @@ static void lsi_do_msgin(LSIState *s) assert(len > 0 && len <= LSI_MAX_MSGIN_LEN); if (len > s->dbc) len = s->dbc; - pci_dma_write(PCI_DEVICE(s), s->dnad, s->msg, len); - /* Linux drivers rely on the last byte being in the SIDL. */ - s->sidl = s->msg[len - 1]; - s->msg_len -= len; - if (s->msg_len) { - memmove(s->msg, s->msg + len, s->msg_len); - } else { + + if (len) { + pci_dma_write(PCI_DEVICE(s), s->dnad, s->msg, len); + /* Linux drivers rely on the last byte being in the SIDL. */ + s->sidl = s->msg[len - 1]; + s->msg_len -= len; + if (s->msg_len) { + memmove(s->msg, s->msg + len, s->msg_len); + } + } + + if (!s->msg_len) { /* ??? Check if ATN (not yet implemented) is asserted and maybe switch to PHASE_MO. */ switch (s->msg_action) { |