summaryrefslogtreecommitdiffstats
path: root/drivers/firewire/ohci.c
diff options
context:
space:
mode:
authorStefan Richter <stefanr@s5r6.in-berlin.de>2010-07-18 13:00:50 +0200
committerStefan Richter <stefanr@s5r6.in-berlin.de>2010-07-23 13:36:28 +0200
commitcc550216ae9a2993ef3973464714dc1a39ab1f86 (patch)
tree62ffde836c83fe44b7a9edc01d00bcb9ad4f4ad6 /drivers/firewire/ohci.c
parentbf54e1462b9192fdef7ea9e2bc44fdc16a4b87bc (diff)
firewire: cdev: add PHY pinging
This extends the FW_CDEV_IOC_SEND_PHY_PACKET ioctl() for /dev/fw* to be useful for ping time measurements. One application for it would be gap count optimization in userspace that is based on ping times rather than hop count. (The latter is implemented in firewire-core itself but is not applicable to beta PHYs that act as repeater.) Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/ohci.c')
-rw-r--r--drivers/firewire/ohci.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 08afccc6633..5f6bb2c5380 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1068,6 +1068,9 @@ static int at_context_queue_packet(struct context *ctx,
header[1] = cpu_to_le32(packet->header[0]);
header[2] = cpu_to_le32(packet->header[1]);
d[0].req_count = cpu_to_le16(12);
+
+ if (is_ping_packet(packet->header))
+ d[0].control |= cpu_to_le16(DESCRIPTOR_PING);
break;
case 4: