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firewire: cdev: fix fw_cdev_event_bus_reset.bm_node_id

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Fix an obscure ABI feature that is a bit of a hassle to implement.
However, somebody put it into the ABI, so let's fill in a sensible
value there.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2010-06-21 23:24:35 +02:00
parent ae94801107
commit 250b2b6dd4
5 changed files with 17 additions and 4 deletions
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5
include/linux/firewire-cdev.h
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@ -66,6 +66,10 @@ struct fw_cdev_event_common {
* This event is sent when the bus the device belongs to goes through a bus
* reset. It provides information about the new bus configuration, such as
* new node ID for this device, new root ID, and others.
*
* If @bm_node_id is 0xffff right after bus reset it can be reread by an
* %FW_CDEV_IOC_GET_INFO ioctl after bus manager selection was finished.
* Kernels with ABI version < 4 do not set @bm_node_id.
*/
struct fw_cdev_event_bus_reset {
__u64 closure;
@ -348,6 +352,7 @@ union fw_cdev_event {
* 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable
* - added %FW_CDEV_IOC_GET_CYCLE_TIMER2
* 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2
* - implemented &fw_cdev_event_bus_reset.bm_node_id
*/
#define FW_CDEV_VERSION 3 /* Meaningless; don't use this macro. */