1 files changed, 341 insertions, 276 deletions

diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
index f7ea7287c59..6fc71a4c8a5 100644
--- a/sound/core/rawmidi.c
+++ b/sound/core/rawmidi.c
@@ -27,7 +27,7 @@
 #include <linux/time.h>
 #include <linux/wait.h>
 #include <linux/mutex.h>
-#include <linux/moduleparam.h>
+#include <linux/module.h>
 #include <linux/delay.h>
 #include <sound/rawmidi.h>
 #include <sound/info.h>
@@ -56,6 +56,13 @@ static int snd_rawmidi_dev_disconnect(struct snd_device *device);
 static LIST_HEAD(snd_rawmidi_devices);
 static DEFINE_MUTEX(register_mutex);
 
+#define rmidi_err(rmidi, fmt, args...) \
+	dev_err((rmidi)->card->dev, fmt, ##args)
+#define rmidi_warn(rmidi, fmt, args...) \
+	dev_warn((rmidi)->card->dev, fmt, ##args)
+#define rmidi_dbg(rmidi, fmt, args...) \
+	dev_dbg((rmidi)->card->dev, fmt, ##args)
+
 static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
 {
 	struct snd_rawmidi *rawmidi;
@@ -92,16 +99,12 @@ static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substre
 	       (!substream->append || runtime->avail >= count);
 }
 
-static void snd_rawmidi_input_event_tasklet(unsigned long data)
-{
-	struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
-	substream->runtime->event(substream);
-}
-
-static void snd_rawmidi_output_trigger_tasklet(unsigned long data)
+static void snd_rawmidi_input_event_work(struct work_struct *work)
 {
-	struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data;
-	substream->ops->trigger(substream, 1);
+	struct snd_rawmidi_runtime *runtime =
+		container_of(work, struct snd_rawmidi_runtime, event_work);
+	if (runtime->event)
+		runtime->event(runtime->substream);
 }
 
 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
@@ -110,16 +113,10 @@ static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
 
 	if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
 		return -ENOMEM;
+	runtime->substream = substream;
 	spin_lock_init(&runtime->lock);
 	init_waitqueue_head(&runtime->sleep);
-	if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
-		tasklet_init(&runtime->tasklet,
-			     snd_rawmidi_input_event_tasklet,
-			     (unsigned long)substream);
-	else
-		tasklet_init(&runtime->tasklet,
-			     snd_rawmidi_output_trigger_tasklet,
-			     (unsigned long)substream);
+	INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
 	runtime->event = NULL;
 	runtime->buffer_size = PAGE_SIZE;
 	runtime->avail_min = 1;
@@ -148,19 +145,18 @@ static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
 
 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
 {
-	if (up) {
-		tasklet_hi_schedule(&substream->runtime->tasklet);
-	} else {
-		tasklet_kill(&substream->runtime->tasklet);
-		substream->ops->trigger(substream, 0);
-	}
+	if (!substream->opened)
+		return;
+	substream->ops->trigger(substream, up);
 }
 
 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
 {
+	if (!substream->opened)
+		return;
 	substream->ops->trigger(substream, up);
-	if (!up && substream->runtime->event)
-		tasklet_kill(&substream->runtime->tasklet);
+	if (!up)
+		cancel_work_sync(&substream->runtime->event_work);
 }
 
 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
@@ -176,6 +172,7 @@ int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return 0;
 }
+EXPORT_SYMBOL(snd_rawmidi_drop_output);
 
 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
 {
@@ -191,7 +188,9 @@ int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
 	if (signal_pending(current))
 		err = -ERESTARTSYS;
 	if (runtime->avail < runtime->buffer_size && !timeout) {
-		snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
+		rmidi_warn(substream->rmidi,
+			   "rawmidi drain error (avail = %li, buffer_size = %li)\n",
+			   (long)runtime->avail, (long)runtime->buffer_size);
 		err = -EIO;
 	}
 	runtime->drain = 0;
@@ -205,6 +204,7 @@ int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
 	}
 	return err;
 }
+EXPORT_SYMBOL(snd_rawmidi_drain_output);
 
 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
 {
@@ -219,159 +219,145 @@ int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return 0;
 }
+EXPORT_SYMBOL(snd_rawmidi_drain_input);
 
-int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
-			    int mode, struct snd_rawmidi_file * rfile)
+/* look for an available substream for the given stream direction;
+ * 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 list_head *list1, *list2;
-	struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
-	struct snd_rawmidi_runtime *input = NULL, *output = NULL;
-	int err;
+	struct snd_rawmidi_substream *substream;
+	struct snd_rawmidi_str *s = &rmidi->streams[stream];
+	static unsigned int info_flags[2] = {
+		[SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
+		[SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
+	};
 
-	if (rfile)
-		rfile->input = rfile->output = NULL;
-	mutex_lock(&register_mutex);
-	rmidi = snd_rawmidi_search(card, device);
-	mutex_unlock(&register_mutex);
-	if (rmidi == NULL) {
-		err = -ENODEV;
-		goto __error1;
-	}
-	if (!try_module_get(rmidi->card->module)) {
-		err = -EFAULT;
-		goto __error1;
-	}
-	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
-		mutex_lock(&rmidi->open_mutex);
-	if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
-		if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) {
-			err = -ENXIO;
-			goto __error;
-		}
-		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 = -ENXIO;
-			goto __error;
-		}
-		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;
+	if (!(rmidi->info_flags & info_flags[stream]))
+		return -ENXIO;
+	if (subdevice >= 0 && subdevice >= s->substream_count)
+		return -ENODEV;
+
+	list_for_each_entry(substream, &s->substreams, list) {
+		if (substream->opened) {
+			if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
+			    !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
+			    !substream->append)
+				continue;
 		}
-	}
-	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;
+		if (subdevice < 0 || subdevice == substream->number) {
+			*sub_ret = substream;
+			return 0;
 		}
-		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;
-			}
+	return -EAGAIN;
+}
+
+/* open and do ref-counting for the given substream */
+static int open_substream(struct snd_rawmidi *rmidi,
+			  struct snd_rawmidi_substream *substream,
+			  int mode)
+{
+	int err;
+
+	if (substream->use_count == 0) {
+		err = snd_rawmidi_runtime_create(substream);
+		if (err < 0)
+			return err;
+		err = substream->ops->open(substream);
+		if (err < 0) {
+			snd_rawmidi_runtime_free(substream);
+			return err;
 		}
-		if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number))
-			break;
-	      __nexto:
-		list2 = list2->next;
+		substream->opened = 1;
+		substream->active_sensing = 0;
+		if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
+			substream->append = 1;
+		substream->pid = get_pid(task_pid(current));
+		rmidi->streams[substream->stream].substream_opened++;
 	}
+	substream->use_count++;
+	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 ((err = snd_rawmidi_runtime_create(sinput)) < 0)
-			goto __error;
-		input = sinput->runtime;
-		if ((err = sinput->ops->open(sinput)) < 0)
-			goto __error;
-		sinput->opened = 1;
-		rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++;
-	} else {
-		sinput = NULL;
+		err = assign_substream(rmidi, subdevice,
+				       SNDRV_RAWMIDI_STREAM_INPUT,
+				       mode, &sinput);
+		if (err < 0)
+			return err;
 	}
 	if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
-		if (soutput->opened)
-			goto __skip_output;
-		if ((err = snd_rawmidi_runtime_create(soutput)) < 0) {
-			if (mode & SNDRV_RAWMIDI_LFLG_INPUT)
-				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;
+		err = assign_substream(rmidi, subdevice,
+				       SNDRV_RAWMIDI_STREAM_OUTPUT,
+				       mode, &soutput);
+		if (err < 0)
+			return err;
 	}
-	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
-		mutex_unlock(&rmidi->open_mutex);
-	if (rfile) {
-		rfile->rmidi = rmidi;
-		rfile->input = sinput;
-		rfile->output = soutput;
+
+	if (sinput) {
+		err = open_substream(rmidi, sinput, mode);
+		if (err < 0)
+			return err;
+	}
+	if (soutput) {
+		err = open_substream(rmidi, soutput, mode);
+		if (err < 0) {
+			if (sinput)
+				close_substream(rmidi, sinput, 0);
+			return err;
+		}
 	}
+
+	rfile->rmidi = rmidi;
+	rfile->input = sinput;
+	rfile->output = soutput;
 	return 0;
+}
 
-      __error:
-	if (input != NULL)
-		snd_rawmidi_runtime_free(sinput);
-	if (output != NULL)
-		snd_rawmidi_runtime_free(soutput);
-	module_put(rmidi->card->module);
-	if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK))
-		mutex_unlock(&rmidi->open_mutex);
-      __error1:
+/* 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;
 }
+EXPORT_SYMBOL(snd_rawmidi_kernel_open);
 
 static int snd_rawmidi_open(struct inode *inode, struct file *file)
 {
@@ -381,10 +367,17 @@ 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 */
+
+	err = nonseekable_open(inode, file);
+	if (err < 0)
+		return err;
+
 	if (maj == snd_major) {
 		rmidi = snd_lookup_minor_data(iminor(inode),
 					      SNDRV_DEVICE_TYPE_RAWMIDI);
@@ -398,37 +391,39 @@ 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)) {
+		snd_card_unref(rmidi->card);
+		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);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto __error;
 	}
 	init_waitqueue_entry(&wait, current);
 	add_wait_queue(&rmidi->open_wait, &wait);
-	mutex_lock(&rmidi->open_mutex);
 	while (1) {
 		subdevice = -1;
-		down_read(&card->controls_rwsem);
+		read_lock(&card->ctl_files_rwlock);
 		list_for_each_entry(kctl, &card->ctl_files, list) {
-			if (kctl->pid == current->pid) {
+			if (kctl->pid == task_pid(current)) {
 				subdevice = kctl->prefer_rawmidi_subdevice;
 				if (subdevice != -1)
 					break;
 			}
 		}
-		up_read(&card->controls_rwsem);
-		err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device,
-					      subdevice, fflags, rawmidi_file);
+		read_unlock(&card->ctl_files_rwlock);
+		err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
 		if (err >= 0)
 			break;
 		if (err == -EAGAIN) {
@@ -442,89 +437,121 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file)
 		mutex_unlock(&rmidi->open_mutex);
 		schedule();
 		mutex_lock(&rmidi->open_mutex);
+		if (rmidi->card->shutdown) {
+			err = -ENODEV;
+			break;
+		}
 		if (signal_pending(current)) {
 			err = -ERESTARTSYS;
 			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);
-	if (err >= 0) {
-		file->private_data = rawmidi_file;
-	} else {
-		snd_card_file_remove(card, file);
-		kfree(rawmidi_file);
-	}
+	file->private_data = rawmidi_file;
 	mutex_unlock(&rmidi->open_mutex);
+	snd_card_unref(rmidi->card);
+	return 0;
+
+ __error:
+	snd_card_file_remove(card, file);
+ __error_card:
+	mutex_unlock(&rmidi->open_mutex);
+	module_put(rmidi->card->module);
+	snd_card_unref(rmidi->card);
 	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;
-	struct snd_rawmidi_substream *substream;
-	struct snd_rawmidi_runtime *runtime;
+	if (--substream->use_count)
+		return;
 
-	snd_assert(rfile != NULL, return -ENXIO);
-	snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO);
-	rmidi = rfile->rmidi;
-	mutex_lock(&rmidi->open_mutex);
-	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 (cleanup) {
+		if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
+			snd_rawmidi_input_trigger(substream, 0);
+		else {
 			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;
+	put_pid(substream->pid);
+	substream->pid = NULL;
+	rmidi->streams[substream->stream].substream_opened--;
+}
+
+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;
 }
+EXPORT_SYMBOL(snd_rawmidi_kernel_release);
 
 static int snd_rawmidi_release(struct inode *inode, struct file *file)
 {
 	struct snd_rawmidi_file *rfile;
 	struct snd_rawmidi *rmidi;
-	int err;
+	struct module *module;
 
 	rfile = file->private_data;
-	err = snd_rawmidi_kernel_release(rfile);
 	rmidi = rfile->rmidi;
-	wake_up(&rmidi->open_wait);
+	rawmidi_release_priv(rfile);
 	kfree(rfile);
+	module = rmidi->card->module;
 	snd_card_file_remove(rmidi->card, file);
-	return err;
+	module_put(module);
+	return 0;
 }
 
 static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
@@ -586,6 +613,7 @@ int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info
 	}
 	return -ENXIO;
 }
+EXPORT_SYMBOL(snd_rawmidi_info_select);
 
 static int snd_rawmidi_info_select_user(struct snd_card *card,
 					struct snd_rawmidi_info __user *_info)
@@ -621,10 +649,10 @@ int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
 		return -EINVAL;
 	}
 	if (params->buffer_size != runtime->buffer_size) {
-		newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
+		newbuf = krealloc(runtime->buffer, params->buffer_size,
+				  GFP_KERNEL);
 		if (!newbuf)
 			return -ENOMEM;
-		kfree(runtime->buffer);
 		runtime->buffer = newbuf;
 		runtime->buffer_size = params->buffer_size;
 		runtime->avail = runtime->buffer_size;
@@ -633,6 +661,7 @@ int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
 	substream->active_sensing = !params->no_active_sensing;
 	return 0;
 }
+EXPORT_SYMBOL(snd_rawmidi_output_params);
 
 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
 			     struct snd_rawmidi_params * params)
@@ -648,16 +677,17 @@ int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
 		return -EINVAL;
 	}
 	if (params->buffer_size != runtime->buffer_size) {
-		newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
+		newbuf = krealloc(runtime->buffer, params->buffer_size,
+				  GFP_KERNEL);
 		if (!newbuf)
 			return -ENOMEM;
-		kfree(runtime->buffer);
 		runtime->buffer = newbuf;
 		runtime->buffer_size = params->buffer_size;
 	}
 	runtime->avail_min = params->avail_min;
 	return 0;
 }
+EXPORT_SYMBOL(snd_rawmidi_input_params);
 
 static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
 				     struct snd_rawmidi_status * status)
@@ -789,10 +819,9 @@ static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long
 			return -EINVAL;
 		}
 	}
-#ifdef CONFIG_SND_DEBUG
 	default:
-		snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
-#endif
+		rmidi_dbg(rfile->rmidi,
+			  "rawmidi: unknown command = 0x%x\n", cmd);
 	}
 	return -ENOTTY;
 }
@@ -811,6 +840,8 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card,
 		
 		if (get_user(device, (int __user *)argp))
 			return -EFAULT;
+		if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
+			device = SNDRV_RAWMIDI_DEVICES - 1;
 		mutex_lock(&register_mutex);
 		device = device < 0 ? 0 : device + 1;
 		while (device < SNDRV_RAWMIDI_DEVICES) {
@@ -848,7 +879,7 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card,
  *
  * Reads the data from the internal buffer.
  *
- * Returns the size of read data, or a negative error code on failure.
+ * Return: The size of read data, or a negative error code on failure.
  */
 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
 			const unsigned char *buffer, int count)
@@ -857,8 +888,11 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
 	int result = 0, count1;
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
+	if (!substream->opened)
+		return -EBADFD;
 	if (runtime->buffer == NULL) {
-		snd_printd("snd_rawmidi_receive: input is not active!!!\n");
+		rmidi_dbg(substream->rmidi,
+			  "snd_rawmidi_receive: input is not active!!!\n");
 		return -EINVAL;
 	}
 	spin_lock_irqsave(&runtime->lock, flags);
@@ -902,13 +936,14 @@ int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
 	}
 	if (result > 0) {
 		if (runtime->event)
-			tasklet_hi_schedule(&runtime->tasklet);
+			schedule_work(&runtime->event_work);
 		else if (snd_rawmidi_ready(substream))
 			wake_up(&runtime->sleep);
 	}
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return result;
 }
+EXPORT_SYMBOL(snd_rawmidi_receive);
 
 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
 				     unsigned char __user *userbuf,
@@ -951,6 +986,7 @@ long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
 	snd_rawmidi_input_trigger(substream, 1);
 	return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
 }
+EXPORT_SYMBOL(snd_rawmidi_kernel_read);
 
 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
 				loff_t *offset)
@@ -982,6 +1018,8 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun
 			spin_unlock_irq(&runtime->lock);
 			schedule();
 			remove_wait_queue(&runtime->sleep, &wait);
+			if (rfile->rmidi->card->shutdown)
+				return -ENODEV;
 			if (signal_pending(current))
 				return result > 0 ? result : -ERESTARTSYS;
 			if (!runtime->avail)
@@ -1005,8 +1043,8 @@ static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t coun
 /**
  * snd_rawmidi_transmit_empty - check whether the output buffer is empty
  * @substream: the rawmidi substream
- * 
- * Returns 1 if the internal output buffer is empty, 0 if not.
+ *
+ * Return: 1 if the internal output buffer is empty, 0 if not.
  */
 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
 {
@@ -1015,7 +1053,8 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
 	unsigned long flags;
 
 	if (runtime->buffer == NULL) {
-		snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
+		rmidi_dbg(substream->rmidi,
+			  "snd_rawmidi_transmit_empty: output is not active!!!\n");
 		return 1;
 	}
 	spin_lock_irqsave(&runtime->lock, flags);
@@ -1023,6 +1062,7 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return result;		
 }
+EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
 
 /**
  * snd_rawmidi_transmit_peek - copy data from the internal buffer
@@ -1036,7 +1076,7 @@ int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
  * and call snd_rawmidi_transmit_ack() after the transmission is
  * finished.
  *
- * Returns the size of copied data, or a negative error code on failure.
+ * Return: The size of copied data, or a negative error code on failure.
  */
 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 			      unsigned char *buffer, int count)
@@ -1046,7 +1086,8 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
 	if (runtime->buffer == NULL) {
-		snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
+		rmidi_dbg(substream->rmidi,
+			  "snd_rawmidi_transmit_peek: output is not active!!!\n");
 		return -EINVAL;
 	}
 	result = 0;
@@ -1078,17 +1119,18 @@ int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return result;
 }
+EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
 
 /**
  * snd_rawmidi_transmit_ack - acknowledge the transmission
  * @substream: the rawmidi substream
- * @count: the tranferred count
+ * @count: the transferred count
  *
  * Advances the hardware pointer for the internal output buffer with
  * the given size and updates the condition.
  * Call after the transmission is finished.
  *
- * Returns the advanced size if successful, or a negative error code on failure.
+ * Return: The advanced size if successful, or a negative error code on failure.
  */
 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 {
@@ -1096,11 +1138,12 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
 	if (runtime->buffer == NULL) {
-		snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
+		rmidi_dbg(substream->rmidi,
+			  "snd_rawmidi_transmit_ack: output is not active!!!\n");
 		return -EINVAL;
 	}
 	spin_lock_irqsave(&runtime->lock, flags);
-	snd_assert(runtime->avail + count <= runtime->buffer_size, );
+	snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
 	runtime->hw_ptr += count;
 	runtime->hw_ptr %= runtime->buffer_size;
 	runtime->avail += count;
@@ -1112,6 +1155,7 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
 	spin_unlock_irqrestore(&runtime->lock, flags);
 	return count;
 }
+EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
 
 /**
  * snd_rawmidi_transmit - copy from the buffer to the device
@@ -1121,16 +1165,19 @@ int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
  * 
  * Copies data from the buffer to the device and advances the pointer.
  *
- * Returns the copied size if successful, or a negative error code on failure.
+ * Return: The copied size if successful, or a negative error code on failure.
  */
 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
 			 unsigned char *buffer, int count)
 {
+	if (!substream->opened)
+		return -EBADFD;
 	count = snd_rawmidi_transmit_peek(substream, buffer, count);
 	if (count < 0)
 		return count;
 	return snd_rawmidi_transmit_ack(substream, count);
 }
+EXPORT_SYMBOL(snd_rawmidi_transmit);
 
 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
 				      const unsigned char __user *userbuf,
@@ -1141,8 +1188,10 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
 	long count1, result;
 	struct snd_rawmidi_runtime *runtime = substream->runtime;
 
-	snd_assert(kernelbuf != NULL || userbuf != NULL, return -EINVAL);
-	snd_assert(runtime->buffer != NULL, return -EINVAL);
+	if (snd_BUG_ON(!kernelbuf && !userbuf))
+		return -EINVAL;
+	if (snd_BUG_ON(!runtime->buffer))
+		return -EINVAL;
 
 	result = 0;
 	spin_lock_irqsave(&runtime->lock, flags);
@@ -1190,6 +1239,7 @@ long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
 {
 	return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
 }
+EXPORT_SYMBOL(snd_rawmidi_kernel_write);
 
 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
 				 size_t count, loff_t *offset)
@@ -1221,6 +1271,8 @@ static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
 			spin_unlock_irq(&runtime->lock);
 			timeout = schedule_timeout(30 * HZ);
 			remove_wait_queue(&runtime->sleep, &wait);
+			if (rfile->rmidi->card->shutdown)
+				return -ENODEV;
 			if (signal_pending(current))
 				return result > 0 ? result : -ERESTARTSYS;
 			if (!runtime->avail && !timeout)
@@ -1237,7 +1289,7 @@ static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
 			break;
 		count -= count1;
 	}
-	if (file->f_flags & O_SYNC) {
+	if (file->f_flags & O_DSYNC) {
 		spin_lock_irq(&runtime->lock);
 		while (runtime->avail != runtime->buffer_size) {
 			wait_queue_t wait;
@@ -1319,6 +1371,9 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
 				    substream->number,
 				    (unsigned long) substream->bytes);
 			if (substream->opened) {
+				snd_iprintf(buffer,
+				    "  Owner PID    : %d\n",
+				    pid_vnr(substream->pid));
 				runtime = substream->runtime;
 				snd_iprintf(buffer,
 				    "  Mode         : %s\n"
@@ -1340,6 +1395,9 @@ static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
 				    substream->number,
 				    (unsigned long) substream->bytes);
 			if (substream->opened) {
+				snd_iprintf(buffer,
+					    "  Owner PID    : %d\n",
+					    pid_vnr(substream->pid));
 				runtime = substream->runtime;
 				snd_iprintf(buffer,
 					    "  Buffer size  : %lu\n"
@@ -1365,6 +1423,7 @@ static const struct file_operations snd_rawmidi_f_ops =
 	.write =	snd_rawmidi_write,
 	.open =		snd_rawmidi_open,
 	.release =	snd_rawmidi_release,
+	.llseek =	no_llseek,
 	.poll =		snd_rawmidi_poll,
 	.unlocked_ioctl =	snd_rawmidi_ioctl,
 	.compat_ioctl =	snd_rawmidi_ioctl_compat,
@@ -1381,7 +1440,7 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
 	for (idx = 0; idx < count; idx++) {
 		substream = kzalloc(sizeof(*substream), GFP_KERNEL);
 		if (substream == NULL) {
-			snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
+			rmidi_err(rmidi, "rawmidi: cannot allocate substream\n");
 			return -ENOMEM;
 		}
 		substream->stream = direction;
@@ -1406,7 +1465,7 @@ static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
  * Creates a new rawmidi instance.
  * Use snd_rawmidi_set_ops() to set the operators to the new instance.
  *
- * Returns zero if successful, or a negative error code on failure.
+ * Return: Zero if successful, or a negative error code on failure.
  */
 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 		    int output_count, int input_count,
@@ -1420,12 +1479,13 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 		.dev_disconnect = snd_rawmidi_dev_disconnect,
 	};
 
-	snd_assert(rrawmidi != NULL, return -EINVAL);
-	*rrawmidi = NULL;
-	snd_assert(card != NULL, return -ENXIO);
+	if (snd_BUG_ON(!card))
+		return -ENXIO;
+	if (rrawmidi)
+		*rrawmidi = NULL;
 	rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
 	if (rmidi == NULL) {
-		snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
+		dev_err(card->dev, "rawmidi: cannot allocate\n");
 		return -ENOMEM;
 	}
 	rmidi->card = card;
@@ -1455,9 +1515,11 @@ int snd_rawmidi_new(struct snd_card *card, char *id, int device,
 		snd_rawmidi_free(rmidi);
 		return err;
 	}
-	*rrawmidi = rmidi;
+	if (rrawmidi)
+		*rrawmidi = rmidi;
 	return 0;
 }
+EXPORT_SYMBOL(snd_rawmidi_new);
 
 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
 {
@@ -1472,7 +1534,8 @@ static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
 
 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
 {
-	snd_assert(rmidi != NULL, return -ENXIO);	
+	if (!rmidi)
+		return 0;
 
 	snd_info_free_entry(rmidi->proc_entry);
 	rmidi->proc_entry = NULL;
@@ -1522,7 +1585,8 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
 	if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
 				       rmidi->card, rmidi->device,
 				       &snd_rawmidi_f_ops, rmidi, name)) < 0) {
-		snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
+		rmidi_err(rmidi, "unable to register rawmidi device %i:%i\n",
+			  rmidi->card->number, rmidi->device);
 		list_del(&rmidi->list);
 		mutex_unlock(&register_mutex);
 		return err;
@@ -1539,8 +1603,10 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
 	if ((int)rmidi->device == midi_map[rmidi->card->number]) {
 		if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
 					    rmidi->card, 0, &snd_rawmidi_f_ops,
-					    rmidi, name) < 0) {
-			snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
+					    rmidi) < 0) {
+			rmidi_err(rmidi,
+				  "unable to register OSS rawmidi device %i:%i\n",
+				  rmidi->card->number, 0);
 		} else {
 			rmidi->ossreg++;
 #ifdef SNDRV_OSS_INFO_DEV_MIDI
@@ -1551,8 +1617,10 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
 	if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
 		if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
 					    rmidi->card, 1, &snd_rawmidi_f_ops,
-					    rmidi, name) < 0) {
-			snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
+					    rmidi) < 0) {
+			rmidi_err(rmidi,
+				  "unable to register OSS rawmidi device %i:%i\n",
+				  rmidi->card->number, 1);
 		} else {
 			rmidi->ossreg++;
 		}
@@ -1586,9 +1654,20 @@ static int snd_rawmidi_dev_register(struct snd_device *device)
 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
 {
 	struct snd_rawmidi *rmidi = device->device_data;
+	int dir;
 
 	mutex_lock(&register_mutex);
+	mutex_lock(&rmidi->open_mutex);
+	wake_up(&rmidi->open_wait);
 	list_del_init(&rmidi->list);
+	for (dir = 0; dir < 2; dir++) {
+		struct snd_rawmidi_substream *s;
+		list_for_each_entry(s, &rmidi->streams[dir].substreams, list) {
+			if (s->runtime)
+				wake_up(&s->runtime->sleep);
+		}
+	}
+
 #ifdef CONFIG_SND_OSSEMUL
 	if (rmidi->ossreg) {
 		if ((int)rmidi->device == midi_map[rmidi->card->number]) {
@@ -1603,6 +1682,7 @@ static int snd_rawmidi_dev_disconnect(struct snd_device *device)
 	}
 #endif /* CONFIG_SND_OSSEMUL */
 	snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
+	mutex_unlock(&rmidi->open_mutex);
 	mutex_unlock(&register_mutex);
 	return 0;
 }
@@ -1623,6 +1703,7 @@ void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
 	list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
 		substream->ops = ops;
 }
+EXPORT_SYMBOL(snd_rawmidi_set_ops);
 
 /*
  *  ENTRY functions
@@ -1638,11 +1719,13 @@ static int __init alsa_rawmidi_init(void)
 	/* check device map table */
 	for (i = 0; i < SNDRV_CARDS; i++) {
 		if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
-			snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
+			pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
+			       i, midi_map[i]);
 			midi_map[i] = 0;
 		}
 		if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
-			snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
+			pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
+			       i, amidi_map[i]);
 			amidi_map[i] = 1;
 		}
 	}
@@ -1659,21 +1742,3 @@ static void __exit alsa_rawmidi_exit(void)
 
 module_init(alsa_rawmidi_init)
 module_exit(alsa_rawmidi_exit)
-
-EXPORT_SYMBOL(snd_rawmidi_output_params);
-EXPORT_SYMBOL(snd_rawmidi_input_params);
-EXPORT_SYMBOL(snd_rawmidi_drop_output);
-EXPORT_SYMBOL(snd_rawmidi_drain_output);
-EXPORT_SYMBOL(snd_rawmidi_drain_input);
-EXPORT_SYMBOL(snd_rawmidi_receive);
-EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
-EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
-EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
-EXPORT_SYMBOL(snd_rawmidi_transmit);
-EXPORT_SYMBOL(snd_rawmidi_new);
-EXPORT_SYMBOL(snd_rawmidi_set_ops);
-EXPORT_SYMBOL(snd_rawmidi_info_select);
-EXPORT_SYMBOL(snd_rawmidi_kernel_open);
-EXPORT_SYMBOL(snd_rawmidi_kernel_release);
-EXPORT_SYMBOL(snd_rawmidi_kernel_read);
-EXPORT_SYMBOL(snd_rawmidi_kernel_write);