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SubjectUpdated patch: module-usage for sound coprocessor device
Date
Hi,

I recently posted a patch for the coprocessor device in the 2.4.0 sound drivers. Well, it appears that I missed the synth device in the mpu401.c file and so here is an updated version.

Cheers,
Chris
diff -urN -X linux-2.4.0/dontdiff linux-vanilla/drivers/sound/audio.c linux-2.4.0/drivers/sound/audio.c
--- linux-vanilla/drivers/sound/audio.c Fri Aug 11 16:26:43 2000
+++ linux-2.4.0/drivers/sound/audio.c Fri Jan 5 23:52:49 2001
@@ -21,6 +21,7 @@
* Daniel Rodriksson: reworked the use of the device specific copy_user
* still generic
* Horst von Brand: Add missing #include <linux/string.h>
+ * Chris Rankin : Update the module-usage counter for the coprocessor
*/

#include <linux/stddef.h>
@@ -71,6 +72,7 @@
int bits;
int dev_type = dev & 0x0f;
int mode = translate_mode(file);
+ struct coproc_operations *coprocessor;

dev = dev >> 4;

@@ -88,9 +90,11 @@
if ((ret = DMAbuf_open(dev, mode)) < 0)
return ret;

- if (audio_devs[dev]->coproc) {
- if ((ret = audio_devs[dev]->coproc->
- open(audio_devs[dev]->coproc->devc, COPR_PCM)) < 0) {
+ if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) {
+ if (coprocessor->owner)
+ __MOD_INC_USE_COUNT(coprocessor->owner);
+
+ if ((ret = coprocessor->open(coprocessor->devc, COPR_PCM)) < 0) {
audio_release(dev, file);
printk(KERN_WARNING "Sound: Can't access coprocessor device\n");
return ret;
@@ -156,7 +160,8 @@

void audio_release(int dev, struct file *file)
{
- int mode = translate_mode(file);
+ struct coproc_operations *coprocessor;
+ int mode = translate_mode(file);

dev = dev >> 4;

@@ -176,8 +181,12 @@
if (mode & OPEN_WRITE)
sync_output(dev);

- if (audio_devs[dev]->coproc)
- audio_devs[dev]->coproc->close(audio_devs[dev]->coproc->devc, COPR_PCM);
+ if ( (coprocessor = audio_devs[dev]->coproc) != NULL ) {
+ coprocessor->close(coprocessor->devc, COPR_PCM);
+
+ if (coprocessor->owner)
+ __MOD_DEC_USE_COUNT(coprocessor->owner);
+ }
DMAbuf_release(dev, mode);

if (audio_devs[dev]->d->owner)
diff -urN -X linux-2.4.0/dontdiff linux-vanilla/drivers/sound/dev_table.h linux-2.4.0/drivers/sound/dev_table.h
--- linux-vanilla/drivers/sound/dev_table.h Fri Aug 11 16:26:43 2000
+++ linux-2.4.0/drivers/sound/dev_table.h Fri Jan 5 13:46:55 2001
@@ -150,6 +150,7 @@
typedef struct coproc_operations
{
char name[64];
+ struct module *owner;
int (*open) (void *devc, int sub_device);
void (*close) (void *devc, int sub_device);
int (*ioctl) (void *devc, unsigned int cmd, caddr_t arg, int local);
diff -urN -X linux-2.4.0/dontdiff linux-vanilla/drivers/sound/mpu401.c linux-2.4.0/drivers/sound/mpu401.c
--- linux-vanilla/drivers/sound/mpu401.c Fri Jan 5 23:14:08 2001
+++ linux-2.4.0/drivers/sound/mpu401.c Fri Jan 5 22:45:50 2001
@@ -14,6 +14,7 @@
* Thomas Sailer ioctl code reworked (vmalloc/vfree removed)
* Alan Cox modularisation, use normal request_irq, use dev_id
* Bartlomiej Zolnierkiewicz removed some __init to allow using many drivers
+ * Chris Rankin Update the module-usage counter for the coprocessor
*/

#include <linux/module.h>
@@ -73,6 +74,9 @@
#define COMDPORT(base) (base+1)
#define STATPORT(base) (base+1)

+
+static void mpu401_close(int dev);
+
static int mpu401_status(struct mpu_config *devc)
{
return inb(STATPORT(devc->base));
@@ -465,6 +469,7 @@
{
int err;
struct mpu_config *devc;
+ struct coproc_operations *coprocessor;

if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
return -ENXIO;
@@ -490,12 +495,15 @@
reset_mpu401(devc);
}

- if (midi_devs[dev]->coproc)
+ if ( (coprocessor = midi_devs[dev]->coproc) != NULL )
{
- if ((err = midi_devs[dev]->coproc->
- open(midi_devs[dev]->coproc->devc, COPR_MIDI)) < 0)
+ if (coprocessor->owner)
+ __MOD_INC_USE_COUNT(coprocessor->owner);
+
+ if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
{
- printk("MPU-401: Can't access coprocessor device\n");
+ printk(KERN_WARNING "MPU-401: Can't access coprocessor device\n");
+ mpu401_close(dev);
return err;
}
}
@@ -515,6 +523,7 @@
static void mpu401_close(int dev)
{
struct mpu_config *devc;
+ struct coproc_operations *coprocessor;

devc = &dev_conf[dev];
if (devc->uart_mode)
@@ -524,8 +533,13 @@
devc->mode = 0;
devc->inputintr = NULL;

- if (midi_devs[dev]->coproc)
- midi_devs[dev]->coproc->close(midi_devs[dev]->coproc->devc, COPR_MIDI);
+ coprocessor = midi_devs[dev]->coproc;
+ if (coprocessor) {
+ coprocessor->close(coprocessor->devc, COPR_MIDI);
+
+ if (coprocessor->owner)
+ __MOD_DEC_USE_COUNT(coprocessor->owner);
+ }
devc->opened = 0;
}

@@ -791,6 +805,7 @@
{
int midi_dev, err;
struct mpu_config *devc;
+ struct coproc_operations *coprocessor;

midi_dev = synth_devs[dev]->midi_dev;

@@ -822,13 +837,17 @@

devc->inputintr = NULL;

- if (midi_devs[midi_dev]->coproc)
- if ((err = midi_devs[midi_dev]->coproc->
- open(midi_devs[midi_dev]->coproc->devc, COPR_MIDI)) < 0)
+ coprocessor = midi_devs[midi_dev]->coproc;
+ if (coprocessor) {
+ if (coprocessor->owner)
+ __MOD_INC_USE_COUNT(coprocessor->owner);
+
+ if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
{
printk(KERN_WARNING "mpu401: Can't access coprocessor device\n");
return err;
}
+ }
devc->opened = mode;
reset_mpu401(devc);

@@ -845,6 +864,7 @@
{
int midi_dev;
struct mpu_config *devc;
+ struct coproc_operations *coprocessor;

midi_dev = synth_devs[dev]->midi_dev;

@@ -854,8 +874,13 @@

devc->inputintr = NULL;

- if (midi_devs[midi_dev]->coproc)
- midi_devs[midi_dev]->coproc->close(midi_devs[midi_dev]->coproc->devc, COPR_MIDI);
+ coprocessor = midi_devs[midi_dev]->coproc;
+ if (coprocessor) {
+ coprocessor->close(coprocessor->devc, COPR_MIDI);
+
+ if (coprocessor->owner)
+ __MOD_DEC_USE_COUNT(coprocessor->owner);
+ }
devc->opened = 0;
devc->mode = 0;
}
diff -urN -X linux-2.4.0/dontdiff linux-vanilla/drivers/sound/pss.c linux-2.4.0/drivers/sound/pss.c
--- linux-vanilla/drivers/sound/pss.c Sun Nov 12 02:33:14 2000
+++ linux-2.4.0/drivers/sound/pss.c Fri Jan 5 13:46:55 2001
@@ -52,6 +52,8 @@
* Adapted to module_init/module_exit
* 11-10-2000: Bartlomiej Zolnierkiewicz <bkz@linux-ide.org>
* Added __init to probe_pss(), attach_pss() and probe_pss_mpu()
+ * 02-Jan-2001: Chris Rankin
+ * Specify that this module owns the coprocessor
*/


@@ -979,6 +981,7 @@
static coproc_operations pss_coproc_operations =
{
"ADSP-2115",
+ THIS_MODULE,
pss_coproc_open,
pss_coproc_close,
pss_coproc_ioctl,
diff -urN -X linux-2.4.0/dontdiff linux-vanilla/drivers/sound/sscape.c linux-2.4.0/drivers/sound/sscape.c
--- linux-vanilla/drivers/sound/sscape.c Sun Nov 12 02:33:14 2000
+++ linux-2.4.0/drivers/sound/sscape.c Fri Jan 5 13:53:12 2001
@@ -15,6 +15,7 @@
* Sergey Smitienko : ensoniq p'n'p support
* Christoph Hellwig : adapted to module_init/module_exit
* Bartlomiej Zolnierkiewicz : added __init to attach_sscape()
+ * Chris Rankin : Specify that this module owns the coprocessor
*/

#include <linux/init.h>
@@ -600,6 +601,7 @@
static coproc_operations sscape_coproc_operations =
{
"SoundScape M68K",
+ THIS_MODULE,
sscape_coproc_open,
sscape_coproc_close,
sscape_coproc_ioctl,
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