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destroy child devices on detach to prevent ever-increasing numbers of

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pcm/midi devices trying to attach if the module is repeatedly loaded and
unloaded.
This commit is contained in:
Cameron Grant 2001-03-17 16:04:25 +00:00
parent fccc713c06
commit c6c3b893e5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=74395
1 changed files with 10 additions and 7 deletions
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17
sys/dev/sound/isa/sbc.c
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@ -43,6 +43,7 @@ struct sbc_ihl {
/* Here is the parameter structure per a device. */
struct sbc_softc {
device_t dev; /* device */
device_t child_pcm, child_midi1, child_midi2;
int io_rid[IO_MAX]; /* io port rids */
struct resource *io[IO_MAX]; /* io port resources */
@ -298,7 +299,6 @@ sbc_attach(device_t dev)
char *err = NULL;
struct sbc_softc *scp;
struct sndcard_func *func;
device_t child;
u_int32_t logical_id = isa_get_logicalid(dev);
int flags = device_get_flags(dev);
int f, dh, dl, x, irq, i;
@ -405,24 +405,24 @@ sbc_attach(device_t dev)
if (func == NULL) goto bad;
bzero(func, sizeof(*func));
func->func = SCF_PCM;
child = device_add_child(dev, "pcm", -1);
device_set_ivars(child, func);
scp->child_pcm = device_add_child(dev, "pcm", -1);
device_set_ivars(scp->child_pcm, func);
/* Midi Interface */
func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT);
if (func == NULL) goto bad;
bzero(func, sizeof(*func));
func->func = SCF_MIDI;
child = device_add_child(dev, "midi", -1);
device_set_ivars(child, func);
scp->child_midi1 = device_add_child(dev, "midi", -1);
device_set_ivars(scp->child_midi1, func);
/* OPL FM Synthesizer */
func = malloc(sizeof(struct sndcard_func), M_DEVBUF, M_NOWAIT);
if (func == NULL) goto bad;
bzero(func, sizeof(*func));
func->func = SCF_SYNTH;
child = device_add_child(dev, "midi", -1);
device_set_ivars(child, func);
scp->child_midi2 = device_add_child(dev, "midi", -1);
device_set_ivars(scp->child_midi2, func);
/* probe/attach kids */
bus_generic_attach(dev);
@ -439,6 +439,9 @@ sbc_detach(device_t dev)
{
struct sbc_softc *scp = device_get_softc(dev);
device_delete_child(dev, scp->child_midi2);
device_delete_child(dev, scp->child_midi1);
device_delete_child(dev, scp->child_pcm);
release_resource(scp);
return bus_generic_detach(dev);
}