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This commit is contained in:
cg 2003-08-15 02:31:13 +00:00
parent d762c77b6d
commit 62de750667
1 changed files with 11 additions and 3 deletions
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14
sys/dev/sound/pcm/dsp.c
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@ -214,20 +214,28 @@ dsp_open(dev_t i_dev, int flags, int mode, struct thread *td)
wrch = i_dev->si_drv2;
if ((dsp_get_flags(i_dev) & SD_F_SIMPLEX) && (rdch || wrch)) {
/* simplex device, already open, exit */
/* we're a simplex device and already open, no go */
pcm_unlock(d);
splx(s);
return EBUSY;
}
if (((flags & FREAD) && rdch) || ((flags & FWRITE) && wrch)) {
/* device already open in one or both directions */
/*
* device already open in one or both directions that
* the opener wants; we can't handle this.
*/
pcm_unlock(d);
splx(s);
return EBUSY;
}
/* if we get here, the open request is valid */
/*
* if we get here, the open request is valid- either:
* * we were previously not open
* * we were open for play xor record and the opener wants
* the non-open direction
*/
if (flags & FREAD) {
/* open for read */
if (devtype == SND_DEV_DSPREC)