diff options
Diffstat (limited to 'sound/firewire/fireworks/fireworks_command.c')
| -rw-r--r-- | sound/firewire/fireworks/fireworks_command.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sound/firewire/fireworks/fireworks_command.c b/sound/firewire/fireworks/fireworks_command.c index d5ea7051ad0c..166f80584c2a 100644 --- a/sound/firewire/fireworks/fireworks_command.c +++ b/sound/firewire/fireworks/fireworks_command.c @@ -22,7 +22,8 @@ * Information commands. But this module don't use them. */ -#define EFW_TRANSACTION_SEQNUM_MAX ((u32)~0) +#define KERNEL_SEQNUM_MIN (SND_EFW_TRANSACTION_USER_SEQNUM_MAX + 2) +#define KERNEL_SEQNUM_MAX ((u32)~0) /* for clock source and sampling rate */ struct efc_clock { @@ -120,8 +121,9 @@ efw_transaction(struct snd_efw *efw, unsigned int category, /* to keep consistency of sequence number */ spin_lock(&efw->lock); - if (efw->seqnum + 2 >= EFW_TRANSACTION_SEQNUM_MAX) - efw->seqnum = 0; + if ((efw->seqnum < KERNEL_SEQNUM_MIN) || + (efw->seqnum >= KERNEL_SEQNUM_MAX - 2)) + efw->seqnum = KERNEL_SEQNUM_MIN; else efw->seqnum += 2; seqnum = efw->seqnum; |