diff options
Diffstat (limited to 'drivers/firewire/fw-transaction.h')
| -rw-r--r-- | drivers/firewire/fw-transaction.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h index c9ab12a15f6..1d78e9cc594 100644 --- a/drivers/firewire/fw-transaction.h +++ b/drivers/firewire/fw-transaction.h @@ -276,6 +276,15 @@ static inline void fw_card_put(struct fw_card *card) extern void fw_schedule_bm_work(struct fw_card *card, unsigned long delay); /* + * Check whether new_generation is the immediate successor of old_generation. + * Take counter roll-over at 255 (as per to OHCI) into account. + */ +static inline bool is_next_generation(int new_generation, int old_generation) +{ + return (new_generation & 0xff) == ((old_generation + 1) & 0xff); +} + +/* * The iso packet format allows for an immediate header/payload part * stored in 'header' immediately after the packet info plus an * indirect payload part that is pointer to by the 'payload' field. |