1 files changed, 194 insertions, 183 deletions
diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index 60f33e9412ad..473247c8e6d3 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -224,156 +224,143 @@ int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
        return 0;
 }
-int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
+/* look for an available substream for the given stream direction;
-                            int mode, struct snd_rawmidi_file * rfile)
+ * if a specific subdevice is given, try to assign it
+ */
+static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
+                            int stream, int mode,
+                            struct snd_rawmidi_substream **sub_ret)
 {
-        struct snd_rawmidi *rmidi;
+        struct snd_rawmidi_substream *substream;
-        struct list_head *list1, *list2;
+        struct snd_rawmidi_str *s = &rmidi->streams[stream];
-        struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
+        static unsigned int info_flags[2] = {
-        struct snd_rawmidi_runtime *input = NULL, *output = NULL;
+                [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
-        int err;
+                [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
+        };
-        if (rfile)
+        if (!(rmidi->info_flags & info_flags[stream]))
-                rfile->input = rfile->output = NULL;
-        mutex_lock(&register_mutex);
-        rmidi = snd_rawmidi_search(card, device);
-        if (rmidi == NULL) {
-                mutex_unlock(&register_mutex);
-                return -ENODEV;
-        }
-        if (!try_module_get(rmidi->card->module)) {
-                mutex_unlock(&register_mutex);
                return -ENXIO;
+        if (subdevice >= 0 && subdevice >= s->substream_count)
+                return -ENODEV;
+        if (s->substream_opened >= s->substream_count)
+                return -EAGAIN;
+        list_for_each_entry(substream, &s->substreams, list) {
+                if (substream->opened) {
+                        if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
+                            !(mode & SNDRV_RAWMIDI_LFLG_APPEND))
+                                continue;
+                }
+                if (subdevice < 0 || subdevice == substream->number) {
+                        *sub_ret = substream;
+                        return 0;
+                }
        }
-        mutex_unlock(&register_mutex);
+        return -EAGAIN;
+}
-        if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
+/* open and do ref-counting for the given substream */
-                mutex_lock(&rmidi->open_mutex);
+static int open_substream(struct snd_rawmidi *rmidi,
+                          struct snd_rawmidi_substream *substream,
+                          int mode)
+{
+        int err;
+        err = snd_rawmidi_runtime_create(substream);
+        if (err < 0)
+                return err;
+        err = substream->ops->open(substream);
+        if (err < 0)
+                return err;
+        substream->opened = 1;
+        if (substream->use_count++ == 0)
+                substream->active_sensing = 1;
+        if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
+                substream->append = 1;
+        rmidi->streams[substream->stream].substream_opened++;
+        return 0;
+}
+static void close_substream(struct snd_rawmidi *rmidi,
+                            struct snd_rawmidi_substream *substream,
+                            int cleanup);
+static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
+                             struct snd_rawmidi_file *rfile)
+{
+        struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
+        int err;
+        rfile->input = rfile->output = NULL;
        if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
-                if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
+                err = assign_substream(rmidi, subdevice,
-                        err = -ENXIO;
+                                       SNDRV_RAWMIDI_STREAM_INPUT,
-                        goto __error;
+                                       mode, &sinput);
-                }
+                if (err < 0)
-                if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
-                        err = -ENODEV;
-                        goto __error;
-                }
-                if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
-                    rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
-                        err = -EAGAIN;
                        goto __error;
-                }
        }
        if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
-                if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {
+                err = assign_substream(rmidi, subdevice,
-                        err = -ENXIO;
+                                       SNDRV_RAWMIDI_STREAM_OUTPUT,
-                        goto __error;
+                                       mode, &soutput);
-                }
+                if (err < 0)
-                if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
-                        err = -ENODEV;
-                        goto __error;
-                }
-                if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
-                    rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
-                        err = -EAGAIN;
                        goto __error;
-                }
-        }
-        list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
-        while (1) {
-                if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
-                        sinput = NULL;
-                        if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
-                                err = -EAGAIN;
-                                goto __error;
-                        }
-                        break;
-                }
-                sinput = list_entry(list1, struct snd_rawmidi_substream, list);
-                if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
-                        goto __nexti;
-                if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number))
-                        break;
-              __nexti:
-                list1 = list1->next;
-        }
-        list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
-        while (1) {
-                if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
-                        soutput = NULL;
-                        if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
-                                err = -EAGAIN;
-                                goto __error;
-                        }
-                        break;
-                }
-                soutput = list_entry(list2, struct snd_rawmidi_substream, list);
-                if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
-                        if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
-                                if (soutput->opened && !soutput->append)
-                                        goto __nexto;
-                        } else {
-                                if (soutput->opened)
-                                        goto __nexto;
-                        }
-                }
-                if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
-                        break;
-              __nexto:
-                list2 = list2->next;
        }
-        if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
-                if ((err = snd_rawmidi_runtime_create(sinput)) < 0)
+        if (sinput) {
-                        goto __error;
+                err = open_substream(rmidi, sinput, mode);
-                input = sinput->runtime;
+                if (err < 0)
-                if ((err = sinput->ops->open(sinput)) < 0)
                        goto __error;
-                sinput->opened = 1;
-                rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
-        } else {
-                sinput = NULL;
        }
-        if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
+        if (soutput) {
-                if (soutput->opened)
+                err = open_substream(rmidi, soutput, mode);
-                        goto __skip_output;
+                if (err < 0) {
-                if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
+                        if (sinput)
-                        if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
+                                close_substream(rmidi, sinput, 0);
-                                sinput->ops->close(sinput);
-                        goto __error;
-                }
-                output = soutput->runtime;
-                if ((err = soutput->ops->open(soutput)) < 0) {
-                        if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
-                                sinput->ops->close(sinput);
                        goto __error;
                }
-              __skip_output:
-                soutput->opened = 1;
-                if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
-                        soutput->append = 1;
-                if (soutput->use_count++ == 0)
-                        soutput->active_sensing = 1;
-                rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
-        } else {
-                soutput = NULL;
-        }
-        if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
-                mutex_unlock(&rmidi->open_mutex);
-        if (rfile) {
-                rfile->rmidi = rmidi;
-                rfile->input = sinput;
-                rfile->output = soutput;
        }
+        rfile->rmidi = rmidi;
+        rfile->input = sinput;
+        rfile->output = soutput;
        return 0;
      __error:
-        if (input != NULL)
+        if (sinput && sinput->runtime)
                snd_rawmidi_runtime_free(sinput);
-        if (output != NULL)
+        if (soutput && soutput->runtime)
                snd_rawmidi_runtime_free(soutput);
-        if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
+        return err;
-                mutex_unlock(&rmidi->open_mutex);
+}
-        module_put(rmidi->card->module);
+/* called from sound/core/seq/seq_midi.c */
+int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
+                            int mode, struct snd_rawmidi_file * rfile)
+{
+        struct snd_rawmidi *rmidi;
+        int err;
+        if (snd_BUG_ON(!rfile))
+                return -EINVAL;
+        mutex_lock(&register_mutex);
+        rmidi = snd_rawmidi_search(card, device);
+        if (rmidi == NULL) {
+                mutex_unlock(&register_mutex);
+                return -ENODEV;
+        }
+        if (!try_module_get(rmidi->card->module)) {
+                mutex_unlock(&register_mutex);
+                return -ENXIO;
+        }
+        mutex_unlock(&register_mutex);
+        mutex_lock(&rmidi->open_mutex);
+        err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
+        mutex_unlock(&rmidi->open_mutex);
+        if (err < 0)
+                module_put(rmidi->card->module);
        return err;
 }
@@ -385,10 +372,13 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
        unsigned short fflags;
        int err;
        struct snd_rawmidi *rmidi;
-        struct snd_rawmidi_file *rawmidi_file;
+        struct snd_rawmidi_file *rawmidi_file = NULL;
        wait_queue_t wait;
        struct snd_ctl_file *kctl;
+        if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) 
+                return -EINVAL;         /* invalid combination */
        if (maj == snd_major) {
                rmidi = snd_lookup_minor_data(iminor(inode),
                                              SNDRV_DEVICE_TYPE_RAWMIDI);
@@ -402,24 +392,25 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
        if (rmidi == NULL)
                return -ENODEV;
-        if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) 
-                return -EINVAL;         /* invalid combination */
+        if (!try_module_get(rmidi->card->module))
+                return -ENXIO;
+        mutex_lock(&rmidi->open_mutex);
        card = rmidi->card;
        err = snd_card_file_add(card, file);
        if (err < 0)
-                return -ENODEV;
+                goto __error_card;
        fflags = snd_rawmidi_file_flags(file);
        if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
                fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
-        fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
        rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
        if (rawmidi_file == NULL) {
-                snd_card_file_remove(card, file);
+                err = -ENOMEM;
-                return -ENOMEM;
+                goto __error;
        }
        init_waitqueue_entry(&wait, current);
        add_wait_queue(&rmidi->open_wait, &wait);
-        mutex_lock(&rmidi->open_mutex);
        while (1) {
                subdevice = -1;
                read_lock(&card->ctl_files_rwlock);
@@ -431,8 +422,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
                        }
                }
                read_unlock(&card->ctl_files_rwlock);
-                err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,
+                err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
-                                              subdevice, fflags, rawmidi_file);
                if (err >= 0)
                        break;
                if (err == -EAGAIN) {
@@ -451,67 +441,89 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
                        break;
                }
        }
+        remove_wait_queue(&rmidi->open_wait, &wait);
+        if (err < 0) {
+                kfree(rawmidi_file);
+                goto __error;
+        }
 #ifdef CONFIG_SND_OSSEMUL
        if (rawmidi_file->input && rawmidi_file->input->runtime)
                rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
        if (rawmidi_file->output && rawmidi_file->output->runtime)
                rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
 #endif
-        remove_wait_queue(&rmidi->open_wait, &wait);
+        file->private_data = rawmidi_file;
-        if (err >= 0) {
-                file->private_data = rawmidi_file;
-        } else {
-                snd_card_file_remove(card, file);
-                kfree(rawmidi_file);
-        }
        mutex_unlock(&rmidi->open_mutex);
+        return 0;
+ __error:
+        snd_card_file_remove(card, file);
+ __error_card:
+        mutex_unlock(&rmidi->open_mutex);
+        module_put(rmidi->card->module);
        return err;
 }
-int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)
+static void close_substream(struct snd_rawmidi *rmidi,
+                            struct snd_rawmidi_substream *substream,
+                            int cleanup)
 {
-        struct snd_rawmidi *rmidi;
+        rmidi->streams[substream->stream].substream_opened--;
-        struct snd_rawmidi_substream *substream;
+        if (--substream->use_count)
-        struct snd_rawmidi_runtime *runtime;
+                return;
-        if (snd_BUG_ON(!rfile))
+        if (cleanup) {
-                return -ENXIO;
+                if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
-        rmidi = rfile->rmidi;
+                        snd_rawmidi_input_trigger(substream, 0);
-        mutex_lock(&rmidi->open_mutex);
+                else {
-        if (rfile->input != NULL) {
-                substream = rfile->input;
-                rfile->input = NULL;
-                runtime = substream->runtime;
-                snd_rawmidi_input_trigger(substream, 0);
-                substream->ops->close(substream);
-                if (runtime->private_free != NULL)
-                        runtime->private_free(substream);
-                snd_rawmidi_runtime_free(substream);
-                substream->opened = 0;
-                rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
-        }
-        if (rfile->output != NULL) {
-                substream = rfile->output;
-                rfile->output = NULL;
-                if (--substream->use_count == 0) {
-                        runtime = substream->runtime;
                        if (substream->active_sensing) {
                                unsigned char buf = 0xfe;
-                                /* sending single active sensing message to shut the device up */
+                                /* sending single active sensing message
+                                 * to shut the device up
+                                 */
                                snd_rawmidi_kernel_write(substream, &buf, 1);
                        }
                        if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
                                snd_rawmidi_output_trigger(substream, 0);
-                        substream->ops->close(substream);
-                        if (runtime->private_free != NULL)
-                                runtime->private_free(substream);
-                        snd_rawmidi_runtime_free(substream);
-                        substream->opened = 0;
-                        substream->append = 0;
                }
-                rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
        }
+        substream->ops->close(substream);
+        if (substream->runtime->private_free)
+                substream->runtime->private_free(substream);
+        snd_rawmidi_runtime_free(substream);
+        substream->opened = 0;
+        substream->append = 0;
+}
+static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
+{
+        struct snd_rawmidi *rmidi;
+        rmidi = rfile->rmidi;
+        mutex_lock(&rmidi->open_mutex);
+        if (rfile->input) {
+                close_substream(rmidi, rfile->input, 1);
+                rfile->input = NULL;
+        }
+        if (rfile->output) {
+                close_substream(rmidi, rfile->output, 1);
+                rfile->output = NULL;
+        }
+        rfile->rmidi = NULL;
        mutex_unlock(&rmidi->open_mutex);
+        wake_up(&rmidi->open_wait);
+}
+/* called from sound/core/seq/seq_midi.c */
+int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
+{
+        struct snd_rawmidi *rmidi;
+        if (snd_BUG_ON(!rfile))
+                return -ENXIO;
+        
+        rmidi = rfile->rmidi;
+        rawmidi_release_priv(rfile);
        module_put(rmidi->card->module);
        return 0;
 }
@@ -520,15 +532,14 @@ static int snd_rawmidi_release(struct inode *inode, struct file *file)
 {
        struct snd_rawmidi_file *rfile;
        struct snd_rawmidi *rmidi;
-        int err;
        rfile = file->private_data;
-        err = snd_rawmidi_kernel_release(rfile);
        rmidi = rfile->rmidi;
-        wake_up(&rmidi->open_wait);
+        rawmidi_release_priv(rfile);
        kfree(rfile);
        snd_card_file_remove(rmidi->card, file);
-        return err;
+        module_put(rmidi->card->module);
+        return 0;
 }
 static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 60f33e9412ad..473247c8e6d3 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c
@@ -224,156 +224,143 @@ int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
224	return 0;	224	return 0;
225	}	225	}
226		226
227	int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,	227	/* look for an available substream for the given stream direction;
228	int mode, struct snd_rawmidi_file * rfile)	228	* if a specific subdevice is given, try to assign it
		229	*/
		230	static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
		231	int stream, int mode,
		232	struct snd_rawmidi_substream **sub_ret)
229	{	233	{
230	struct snd_rawmidi *rmidi;	234	struct snd_rawmidi_substream *substream;
231	struct list_head list1, list2;	235	struct snd_rawmidi_str *s = &rmidi->streams[stream];
232	struct snd_rawmidi_substream sinput = NULL, soutput = NULL;	236	static unsigned int info_flags[2] = {
233	struct snd_rawmidi_runtime input = NULL, output = NULL;	237	[SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
234	int err;	238	[SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
		239	};
235		240
236	if (rfile)	241	if (!(rmidi->info_flags & info_flags[stream]))
237	rfile->input = rfile->output = NULL;
238	mutex_lock(&register_mutex);
239	rmidi = snd_rawmidi_search(card, device);
240	if (rmidi == NULL) {
241	mutex_unlock(&register_mutex);
242	return -ENODEV;
243	}
244	if (!try_module_get(rmidi->card->module)) {
245	mutex_unlock(&register_mutex);
246	return -ENXIO;	242	return -ENXIO;
		243	if (subdevice >= 0 && subdevice >= s->substream_count)
		244	return -ENODEV;
		245	if (s->substream_opened >= s->substream_count)
		246	return -EAGAIN;
		247
		248	list_for_each_entry(substream, &s->substreams, list) {
		249	if (substream->opened) {
		250	if (stream == SNDRV_RAWMIDI_STREAM_INPUT \|\|
		251	!(mode & SNDRV_RAWMIDI_LFLG_APPEND))
		252	continue;
		253	}
		254	if (subdevice < 0 \|\| subdevice == substream->number) {
		255	*sub_ret = substream;
		256	return 0;
		257	}
247	}	258	}
248	mutex_unlock(&register_mutex);	259	return -EAGAIN;
		260	}
249		261
250	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))	262	/* open and do ref-counting for the given substream */
251	mutex_lock(&rmidi->open_mutex);	263	static int open_substream(struct snd_rawmidi *rmidi,
		264	struct snd_rawmidi_substream *substream,
		265	int mode)
		266	{
		267	int err;
		268
		269	err = snd_rawmidi_runtime_create(substream);
		270	if (err < 0)
		271	return err;
		272	err = substream->ops->open(substream);
		273	if (err < 0)
		274	return err;
		275	substream->opened = 1;
		276	if (substream->use_count++ == 0)
		277	substream->active_sensing = 1;
		278	if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
		279	substream->append = 1;
		280	rmidi->streams[substream->stream].substream_opened++;
		281	return 0;
		282	}
		283
		284	static void close_substream(struct snd_rawmidi *rmidi,
		285	struct snd_rawmidi_substream *substream,
		286	int cleanup);
		287
		288	static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
		289	struct snd_rawmidi_file *rfile)
		290	{
		291	struct snd_rawmidi_substream sinput = NULL, soutput = NULL;
		292	int err;
		293
		294	rfile->input = rfile->output = NULL;
252	if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {	295	if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
253	if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {	296	err = assign_substream(rmidi, subdevice,
254	err = -ENXIO;	297	SNDRV_RAWMIDI_STREAM_INPUT,
255	goto __error;	298	mode, &sinput);
256	}	299	if (err < 0)
257	if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
258	err = -ENODEV;
259	goto __error;
260	}
261	if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >=
262	rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) {
263	err = -EAGAIN;
264	goto __error;	300	goto __error;
265	}
266	}	301	}
267	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {	302	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
268	if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) {	303	err = assign_substream(rmidi, subdevice,
269	err = -ENXIO;	304	SNDRV_RAWMIDI_STREAM_OUTPUT,
270	goto __error;	305	mode, &soutput);
271	}	306	if (err < 0)
272	if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
273	err = -ENODEV;
274	goto __error;
275	}
276	if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >=
277	rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) {
278	err = -EAGAIN;
279	goto __error;	307	goto __error;
280	}
281	}
282	list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next;
283	while (1) {
284	if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
285	sinput = NULL;
286	if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
287	err = -EAGAIN;
288	goto __error;
289	}
290	break;
291	}
292	sinput = list_entry(list1, struct snd_rawmidi_substream, list);
293	if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened)
294	goto __nexti;
295	if (subdevice < 0 \|\| (subdevice >= 0 && subdevice == sinput->number))
296	break;
297	__nexti:
298	list1 = list1->next;
299	}
300	list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next;
301	while (1) {
302	if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
303	soutput = NULL;
304	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
305	err = -EAGAIN;
306	goto __error;
307	}
308	break;
309	}
310	soutput = list_entry(list2, struct snd_rawmidi_substream, list);
311	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
312	if (mode & SNDRV_RAWMIDI_LFLG_APPEND) {
313	if (soutput->opened && !soutput->append)
314	goto __nexto;
315	} else {
316	if (soutput->opened)
317	goto __nexto;
318	}
319	}
320	if (subdevice < 0 \|\| (subdevice >= 0 && subdevice == soutput->number))
321	break;
322	__nexto:
323	list2 = list2->next;
324	}	308	}
325	if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {	309
326	if ((err = snd_rawmidi_runtime_create(sinput)) < 0)	310	if (sinput) {
327	goto __error;	311	err = open_substream(rmidi, sinput, mode);
328	input = sinput->runtime;	312	if (err < 0)
329	if ((err = sinput->ops->open(sinput)) < 0)
330	goto __error;	313	goto __error;
331	sinput->opened = 1;
332	rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
333	} else {
334	sinput = NULL;
335	}	314	}
336	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {	315	if (soutput) {
337	if (soutput->opened)	316	err = open_substream(rmidi, soutput, mode);
338	goto __skip_output;	317	if (err < 0) {
339	if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {	318	if (sinput)
340	if (mode & SNDRV_RAWMIDI_LFLG_INPUT)	319	close_substream(rmidi, sinput, 0);
341	sinput->ops->close(sinput);
342	goto __error;
343	}
344	output = soutput->runtime;
345	if ((err = soutput->ops->open(soutput)) < 0) {
346	if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
347	sinput->ops->close(sinput);
348	goto __error;	320	goto __error;
349	}	321	}
350	__skip_output:
351	soutput->opened = 1;
352	if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
353	soutput->append = 1;
354	if (soutput->use_count++ == 0)
355	soutput->active_sensing = 1;
356	rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++;
357	} else {
358	soutput = NULL;
359	}
360	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
361	mutex_unlock(&rmidi->open_mutex);
362	if (rfile) {
363	rfile->rmidi = rmidi;
364	rfile->input = sinput;
365	rfile->output = soutput;
366	}	322	}
		323
		324	rfile->rmidi = rmidi;
		325	rfile->input = sinput;
		326	rfile->output = soutput;
367	return 0;	327	return 0;
368		328
369	__error:	329	__error:
370	if (input != NULL)	330	if (sinput && sinput->runtime)
371	snd_rawmidi_runtime_free(sinput);	331	snd_rawmidi_runtime_free(sinput);
372	if (output != NULL)	332	if (soutput && soutput->runtime)
373	snd_rawmidi_runtime_free(soutput);	333	snd_rawmidi_runtime_free(soutput);
374	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))	334	return err;
375	mutex_unlock(&rmidi->open_mutex);	335	}
376	module_put(rmidi->card->module);	336
		337	/* called from sound/core/seq/seq_midi.c */
		338	int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
		339	int mode, struct snd_rawmidi_file * rfile)
		340	{
		341	struct snd_rawmidi *rmidi;
		342	int err;
		343
		344	if (snd_BUG_ON(!rfile))
		345	return -EINVAL;
		346
		347	mutex_lock(&register_mutex);
		348	rmidi = snd_rawmidi_search(card, device);
		349	if (rmidi == NULL) {
		350	mutex_unlock(&register_mutex);
		351	return -ENODEV;
		352	}
		353	if (!try_module_get(rmidi->card->module)) {
		354	mutex_unlock(&register_mutex);
		355	return -ENXIO;
		356	}
		357	mutex_unlock(&register_mutex);
		358
		359	mutex_lock(&rmidi->open_mutex);
		360	err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
		361	mutex_unlock(&rmidi->open_mutex);
		362	if (err < 0)
		363	module_put(rmidi->card->module);
377	return err;	364	return err;
378	}	365	}
379		366
@@ -385,10 +372,13 @@ static int snd_rawmidi_open(struct inode inode, struct file file)
385	unsigned short fflags;	372	unsigned short fflags;
386	int err;	373	int err;
387	struct snd_rawmidi *rmidi;	374	struct snd_rawmidi *rmidi;
388	struct snd_rawmidi_file *rawmidi_file;	375	struct snd_rawmidi_file *rawmidi_file = NULL;
389	wait_queue_t wait;	376	wait_queue_t wait;
390	struct snd_ctl_file *kctl;	377	struct snd_ctl_file *kctl;
391		378
		379	if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
		380	return -EINVAL; /* invalid combination */
		381
392	if (maj == snd_major) {	382	if (maj == snd_major) {
393	rmidi = snd_lookup_minor_data(iminor(inode),	383	rmidi = snd_lookup_minor_data(iminor(inode),
394	SNDRV_DEVICE_TYPE_RAWMIDI);	384	SNDRV_DEVICE_TYPE_RAWMIDI);
@@ -402,24 +392,25 @@ static int snd_rawmidi_open(struct inode inode, struct file file)
402		392
403	if (rmidi == NULL)	393	if (rmidi == NULL)
404	return -ENODEV;	394	return -ENODEV;
405	if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))	395
406	return -EINVAL; /* invalid combination */	396	if (!try_module_get(rmidi->card->module))
		397	return -ENXIO;
		398
		399	mutex_lock(&rmidi->open_mutex);
407	card = rmidi->card;	400	card = rmidi->card;
408	err = snd_card_file_add(card, file);	401	err = snd_card_file_add(card, file);
409	if (err < 0)	402	if (err < 0)
410	return -ENODEV;	403	goto __error_card;
411	fflags = snd_rawmidi_file_flags(file);	404	fflags = snd_rawmidi_file_flags(file);
412	if ((file->f_flags & O_APPEND) \|\| maj == SOUND_MAJOR) /* OSS emul? */	405	if ((file->f_flags & O_APPEND) \|\| maj == SOUND_MAJOR) /* OSS emul? */
413	fflags \|= SNDRV_RAWMIDI_LFLG_APPEND;	406	fflags \|= SNDRV_RAWMIDI_LFLG_APPEND;
414	fflags \|= SNDRV_RAWMIDI_LFLG_NOOPENLOCK;
415	rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);	407	rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
416	if (rawmidi_file == NULL) {	408	if (rawmidi_file == NULL) {
417	snd_card_file_remove(card, file);	409	err = -ENOMEM;
418	return -ENOMEM;	410	goto __error;
419	}	411	}
420	init_waitqueue_entry(&wait, current);	412	init_waitqueue_entry(&wait, current);
421	add_wait_queue(&rmidi->open_wait, &wait);	413	add_wait_queue(&rmidi->open_wait, &wait);
422	mutex_lock(&rmidi->open_mutex);
423	while (1) {	414	while (1) {
424	subdevice = -1;	415	subdevice = -1;
425	read_lock(&card->ctl_files_rwlock);	416	read_lock(&card->ctl_files_rwlock);
@@ -431,8 +422,7 @@ static int snd_rawmidi_open(struct inode inode, struct file file)
431	}	422	}
432	}	423	}
433	read_unlock(&card->ctl_files_rwlock);	424	read_unlock(&card->ctl_files_rwlock);
434	err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,	425	err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
435	subdevice, fflags, rawmidi_file);
436	if (err >= 0)	426	if (err >= 0)
437	break;	427	break;
438	if (err == -EAGAIN) {	428	if (err == -EAGAIN) {
@@ -451,67 +441,89 @@ static int snd_rawmidi_open(struct inode inode, struct file file)
451	break;	441	break;
452	}	442	}
453	}	443	}
		444	remove_wait_queue(&rmidi->open_wait, &wait);
		445	if (err < 0) {
		446	kfree(rawmidi_file);
		447	goto __error;
		448	}
454	#ifdef CONFIG_SND_OSSEMUL	449	#ifdef CONFIG_SND_OSSEMUL
455	if (rawmidi_file->input && rawmidi_file->input->runtime)	450	if (rawmidi_file->input && rawmidi_file->input->runtime)
456	rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);	451	rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
457	if (rawmidi_file->output && rawmidi_file->output->runtime)	452	if (rawmidi_file->output && rawmidi_file->output->runtime)
458	rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);	453	rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
459	#endif	454	#endif
460	remove_wait_queue(&rmidi->open_wait, &wait);	455	file->private_data = rawmidi_file;
461	if (err >= 0) {
462	file->private_data = rawmidi_file;
463	} else {
464	snd_card_file_remove(card, file);
465	kfree(rawmidi_file);
466	}
467	mutex_unlock(&rmidi->open_mutex);	456	mutex_unlock(&rmidi->open_mutex);
		457	return 0;
		458
		459	__error:
		460	snd_card_file_remove(card, file);
		461	__error_card:
		462	mutex_unlock(&rmidi->open_mutex);
		463	module_put(rmidi->card->module);
468	return err;	464	return err;
469	}	465	}
470		466
471	int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile)	467	static void close_substream(struct snd_rawmidi *rmidi,
		468	struct snd_rawmidi_substream *substream,
		469	int cleanup)
472	{	470	{
473	struct snd_rawmidi *rmidi;	471	rmidi->streams[substream->stream].substream_opened--;
474	struct snd_rawmidi_substream *substream;	472	if (--substream->use_count)
475	struct snd_rawmidi_runtime *runtime;	473	return;
476		474
477	if (snd_BUG_ON(!rfile))	475	if (cleanup) {
478	return -ENXIO;	476	if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
479	rmidi = rfile->rmidi;	477	snd_rawmidi_input_trigger(substream, 0);
480	mutex_lock(&rmidi->open_mutex);	478	else {
481	if (rfile->input != NULL) {
482	substream = rfile->input;
483	rfile->input = NULL;
484	runtime = substream->runtime;
485	snd_rawmidi_input_trigger(substream, 0);
486	substream->ops->close(substream);
487	if (runtime->private_free != NULL)
488	runtime->private_free(substream);
489	snd_rawmidi_runtime_free(substream);
490	substream->opened = 0;
491	rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--;
492	}
493	if (rfile->output != NULL) {
494	substream = rfile->output;
495	rfile->output = NULL;
496	if (--substream->use_count == 0) {
497	runtime = substream->runtime;
498	if (substream->active_sensing) {	479	if (substream->active_sensing) {
499	unsigned char buf = 0xfe;	480	unsigned char buf = 0xfe;
500	/* sending single active sensing message to shut the device up */	481	/* sending single active sensing message
		482	* to shut the device up
		483	*/
501	snd_rawmidi_kernel_write(substream, &buf, 1);	484	snd_rawmidi_kernel_write(substream, &buf, 1);
502	}	485	}
503	if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)	486	if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
504	snd_rawmidi_output_trigger(substream, 0);	487	snd_rawmidi_output_trigger(substream, 0);
505	substream->ops->close(substream);
506	if (runtime->private_free != NULL)
507	runtime->private_free(substream);
508	snd_rawmidi_runtime_free(substream);
509	substream->opened = 0;
510	substream->append = 0;
511	}	488	}
512	rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--;
513	}	489	}
		490	substream->ops->close(substream);
		491	if (substream->runtime->private_free)
		492	substream->runtime->private_free(substream);
		493	snd_rawmidi_runtime_free(substream);
		494	substream->opened = 0;
		495	substream->append = 0;
		496	}
		497
		498	static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
		499	{
		500	struct snd_rawmidi *rmidi;
		501
		502	rmidi = rfile->rmidi;
		503	mutex_lock(&rmidi->open_mutex);
		504	if (rfile->input) {
		505	close_substream(rmidi, rfile->input, 1);
		506	rfile->input = NULL;
		507	}
		508	if (rfile->output) {
		509	close_substream(rmidi, rfile->output, 1);
		510	rfile->output = NULL;
		511	}
		512	rfile->rmidi = NULL;
514	mutex_unlock(&rmidi->open_mutex);	513	mutex_unlock(&rmidi->open_mutex);
		514	wake_up(&rmidi->open_wait);
		515	}
		516
		517	/* called from sound/core/seq/seq_midi.c */
		518	int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
		519	{
		520	struct snd_rawmidi *rmidi;
		521
		522	if (snd_BUG_ON(!rfile))
		523	return -ENXIO;
		524
		525	rmidi = rfile->rmidi;
		526	rawmidi_release_priv(rfile);
515	module_put(rmidi->card->module);	527	module_put(rmidi->card->module);
516	return 0;	528	return 0;
517	}	529	}
@@ -520,15 +532,14 @@ static int snd_rawmidi_release(struct inode inode, struct file file)
520	{	532	{
521	struct snd_rawmidi_file *rfile;	533	struct snd_rawmidi_file *rfile;
522	struct snd_rawmidi *rmidi;	534	struct snd_rawmidi *rmidi;
523	int err;
524		535
525	rfile = file->private_data;	536	rfile = file->private_data;
526	err = snd_rawmidi_kernel_release(rfile);
527	rmidi = rfile->rmidi;	537	rmidi = rfile->rmidi;
528	wake_up(&rmidi->open_wait);	538	rawmidi_release_priv(rfile);
529	kfree(rfile);	539	kfree(rfile);
530	snd_card_file_remove(rmidi->card, file);	540	snd_card_file_remove(rmidi->card, file);
531	return err;	541	module_put(rmidi->card->module);
		542	return 0;
532	}	543	}
533		544
534	static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,	545	static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,