int
snd_seq_oss_write(seq_oss_devinfo_t *dp, const char __user *buf, int count, struct file *opt)
{
int rc, c, p, ev_size;
evrec_t rec;
if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
return -EIO;
c = count;
p = 0;
while (c >= SHORT_EVENT_SIZE) {
if (copy_from_user(rec.c, buf + p, SHORT_EVENT_SIZE))
break;
p += SHORT_EVENT_SIZE;
if (rec.s.code == SEQ_FULLSIZE) {
/* load patch */
int fmt = (*(unsigned short *)rec.c) & 0xffff;
return snd_seq_oss_synth_load_patch(dp, rec.s.dev, fmt, buf, p, c);
}
if (ev_is_long(&rec)) {
/* extended code */
if (rec.s.code == SEQ_EXTENDED &&
dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
return -EINVAL;
ev_size = LONG_EVENT_SIZE;
if (c < ev_size)
break;
/* copy the reset 4 bytes */
if (copy_from_user(rec.c + SHORT_EVENT_SIZE, buf + p,
LONG_EVENT_SIZE - SHORT_EVENT_SIZE))
break;
p += LONG_EVENT_SIZE - SHORT_EVENT_SIZE;
} else {
/* old-type code */
if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
return -EINVAL;
ev_size = SHORT_EVENT_SIZE;
}
/* insert queue */
if ((rc = insert_queue(dp, &rec, opt)) < 0)
break;
c -= ev_size;
}
if (count == c && is_nonblock_mode(dp->file_mode))
return -EAGAIN;
return count - c;
}
int
snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt)
{
int result = 0, err = 0;
int ev_size, fmt;
union evrec rec;
if (! is_write_mode(dp->file_mode) || dp->writeq == NULL)
return -ENXIO;
while (count >= SHORT_EVENT_SIZE) {
if (copy_from_user(&rec, buf, SHORT_EVENT_SIZE)) {
err = -EFAULT;
break;
}
if (rec.s.code == SEQ_FULLSIZE) {
/* load patch */
if (result > 0) {
err = -EINVAL;
break;
}
fmt = (*(unsigned short *)rec.c) & 0xffff;
/* FIXME the return value isn't correct */
return snd_seq_oss_synth_load_patch(dp, rec.s.dev,
fmt, buf, 0, count);
}
if (ev_is_long(&rec)) {
/* extended code */
if (rec.s.code == SEQ_EXTENDED &&
dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
err = -EINVAL;
break;
}
ev_size = LONG_EVENT_SIZE;
if (count < ev_size)
break;
/* copy the reset 4 bytes */
if (copy_from_user(rec.c + SHORT_EVENT_SIZE,
buf + SHORT_EVENT_SIZE,
LONG_EVENT_SIZE - SHORT_EVENT_SIZE)) {
err = -EFAULT;
break;
}
} else {
/* old-type code */
if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
err = -EINVAL;
break;
}
ev_size = SHORT_EVENT_SIZE;
}
/* insert queue */
if ((err = insert_queue(dp, &rec, opt)) < 0)
break;
result += ev_size;
buf += ev_size;
count -= ev_size;
}
return result > 0 ? result : err;
}
