diff options
Diffstat (limited to 'drivers/ieee1394')
| -rw-r--r-- | drivers/ieee1394/hosts.h | 1 | ||||
| -rw-r--r-- | drivers/ieee1394/nodemgr.c | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/ieee1394/hosts.h b/drivers/ieee1394/hosts.h index 38f42112dff0..ae9b02cc013f 100644 --- a/drivers/ieee1394/hosts.h +++ b/drivers/ieee1394/hosts.h @@ -41,6 +41,7 @@ struct hpsb_host { /* this nodes state */ unsigned in_bus_reset:1; unsigned is_shutdown:1; + unsigned resume_packet_sent:1; /* this nodes' duties on the bus */ unsigned is_root:1; diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c index 7fff5a1d2ea4..f7c3dbaf5802 100644 --- a/drivers/ieee1394/nodemgr.c +++ b/drivers/ieee1394/nodemgr.c @@ -1413,6 +1413,24 @@ static void nodemgr_node_probe(struct host_info *hi, int generation) return; } +static int nodemgr_send_resume_packet(struct hpsb_host *host) +{ + struct hpsb_packet *packet; + int ret = 1; + + packet = hpsb_make_phypacket(host, + 0x003c0000 | NODEID_TO_NODE(host->node_id) << 24); + if (packet) { + packet->no_waiter = 1; + packet->generation = get_hpsb_generation(host); + ret = hpsb_send_packet(packet); + } + if (ret) + HPSB_WARN("fw-host%d: Failed to broadcast resume packet", + host->id); + return ret; +} + /* Because we are a 1394a-2000 compliant IRM, we need to inform all the other * nodes of the broadcast channel. (Really we're only setting the validity * bit). Other IRM responsibilities go in here as well. */ @@ -1463,6 +1481,13 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) } } + /* Some devices suspend their ports while being connected to an inactive + * host adapter, i.e. if connected before the low-level driver is + * loaded. They become visible either when physically unplugged and + * replugged, or when receiving a resume packet. Send one once. */ + if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) + host->resume_packet_sent = 1; + return 1; } |