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| author | Ingo Molnar <mingo@elte.hu> | 2009-02-22 17:59:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-22 17:59:49 +0100 |
| commit | 2702e0a46c2d28da92b32c9b068ee1291fc0de35 (patch) | |
| tree | c1e9868a4b91beeebd5f4e820588bc2ae8371911 /drivers/firewire/fw-transaction.h | |
| parent | 42bb8cc5e81028e217105299001070d57eb84ad7 (diff) | |
| parent | adfafefd104d840ee4461965f22624d77532675b (diff) | |
Merge branch 'linus' into timers/hpet
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. |