diff options
Diffstat (limited to 'include/linux/firewire-cdev.h')
| -rw-r--r-- | include/linux/firewire-cdev.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h index cc1b570a2eb3..b9bd349c6930 100644 --- a/include/linux/firewire-cdev.h +++ b/include/linux/firewire-cdev.h @@ -207,12 +207,15 @@ struct fw_cdev_event_request2 { * @closure: See &fw_cdev_event_common; * set by %FW_CDEV_CREATE_ISO_CONTEXT ioctl * @type: See &fw_cdev_event_common; always %FW_CDEV_EVENT_ISO_INTERRUPT - * @cycle: Cycle counter of the interrupt packet + * @cycle: Cycle counter of the last completed packet * @header_length: Total length of following headers, in bytes * @header: Stripped headers, if any * * This event is sent when the controller has completed an &fw_cdev_iso_packet - * with the %FW_CDEV_ISO_INTERRUPT bit set. + * with the %FW_CDEV_ISO_INTERRUPT bit set, or when there have been so many + * completed packets without the interrupt bit set that the kernel's internal + * buffer for @header is about to overflow. (In the latter case, kernels with + * ABI version < 5 drop header data up to the next interrupt packet.) * * Isochronous transmit events (context type %FW_CDEV_ISO_CONTEXT_TRANSMIT): * @@ -440,6 +443,8 @@ union fw_cdev_event { * - added %FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL, * %FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL, and * %FW_CDEV_IOC_SET_ISO_CHANNELS + * 5 (3.4) - send %FW_CDEV_EVENT_ISO_INTERRUPT events when needed to + * avoid dropping data */ /** |