diff options
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-former.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c index f58008762fe6..fa41de978756 100644 --- a/sound/firewire/fireface/ff-protocol-former.c +++ b/sound/firewire/fireface/ff-protocol-former.c @@ -680,28 +680,30 @@ static long ff400_copy_msg_to_user(struct snd_ff *ff, char __user *buf, long cou struct ff400_msg_parser *parser = ff->msg_parser; u32 type = SNDRV_FIREWIRE_EVENT_FF400_MESSAGE; long consumed = 0; + int ret = 0; if (count < 8) return 0; spin_unlock_irq(&ff->lock); - if (copy_to_user(buf, &type, sizeof(type))) - return -EFAULT; - + ret = -EFAULT; spin_lock_irq(&ff->lock); + if (ret) + return ret; count -= sizeof(type); consumed += sizeof(type); while (count >= sizeof(*parser->msgs) && parser->pull_pos != parser->push_pos) { spin_unlock_irq(&ff->lock); - if (copy_to_user(buf + consumed, parser->msgs + parser->pull_pos, sizeof(*parser->msgs))) - return -EFAULT; - + ret = -EFAULT; spin_lock_irq(&ff->lock); + if (ret) + return ret; + ++parser->pull_pos; if (parser->pull_pos >= FF400_QUEUE_SIZE) parser->pull_pos = 0; |