ieee1394: limit early node speed to host interface speed

The following patch limits the node speed to the host interface speed,
before using it.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
It should actually suffice to do this only for the local node's
speedcap[].  But there is another bug in the speed calculation:
The local node's speed is not correctly propagated to the speeds
which are to be used to access remote nodes.
http://thread.gmane.org/gmane.linux.kernel.firewire.devel/11772/focus=12024

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c
index 942bf1f..dcdb71a 100644 (file)
--- a/drivers/ieee1394/ieee1394_core.c
+++ b/drivers/ieee1394/ieee1394_core.c
@@ -373,6 +373,8 @@ static void build_speed_map(struct hpsb_host *host, int nodecount)
                        if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++;
 
                        speedcap[n] = sid->speed;
+                       if (speedcap[n] > host->csr.lnk_spd)
+                               speedcap[n] = host->csr.lnk_spd;
                        n--;
                }
        }