diff options
Diffstat (limited to 'hw/ide/ahci.c')
| -rw-r--r-- | hw/ide/ahci.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index bb6a92f7f4..48749c1dc1 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -279,8 +279,13 @@ static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val) break; case PORT_CMD: /* Block any Read-only fields from being set; - * including LIST_ON and FIS_ON. */ - pr->cmd = (pr->cmd & PORT_CMD_RO_MASK) | (val & ~PORT_CMD_RO_MASK); + * including LIST_ON and FIS_ON. + * The spec requires to set ICC bits to zero after the ICC change + * is done. We don't support ICC state changes, therefore always + * force the ICC bits to zero. + */ + pr->cmd = (pr->cmd & PORT_CMD_RO_MASK) | + (val & ~(PORT_CMD_RO_MASK|PORT_CMD_ICC_MASK)); /* Check FIS RX and CLB engines, allow transition to false: */ ahci_cond_start_engines(&s->dev[port], true); |