[ALSA] usx2y - Code clean up

Modules: USB USX2Y

Clean up snd-usb-usx2y driver code:

- Avoid unnecessary cast
- Fix spaces/indents
- Use kzalloc()
- Remove weird debug prints
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/usb/usx2y/usX2Yhwdep.c

@@ -67,15 +67,15 @@ static struct vm_operations_struct us428ctls_vm_ops = {
 static int snd_us428ctls_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area)
 {
 	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
-	usX2Ydev_t	*us428 = (usX2Ydev_t*)hw->private_data;
+	usX2Ydev_t	*us428 = hw->private_data;
 
 	// FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
 	// so as long as the device isn't fully initialised yet we return -EBUSY here.
- 	if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT))
+ 	if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
 		return -EBUSY;
 
 	/* if userspace tries to mmap beyond end of our buffer, fail */ 
-        if (size > ((PAGE_SIZE - 1 + sizeof(us428ctls_sharedmem_t)) / PAGE_SIZE) * PAGE_SIZE) {
+        if (size > PAGE_ALIGN(sizeof(us428ctls_sharedmem_t))) {
 		snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(us428ctls_sharedmem_t)); 
                 return -EINVAL;
 	}
@@ -96,7 +96,7 @@ static int snd_us428ctls_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_are
 static unsigned int snd_us428ctls_poll(snd_hwdep_t *hw, struct file *file, poll_table *wait)
 {
 	unsigned int	mask = 0;
-	usX2Ydev_t	*us428 = (usX2Ydev_t*)hw->private_data;
+	usX2Ydev_t	*us428 = hw->private_data;
 	us428ctls_sharedmem_t *shm = us428->us428ctls_sharedmem;
 	if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
 		return POLLHUP;
@@ -127,9 +127,10 @@ static int snd_usX2Y_hwdep_dsp_status(snd_hwdep_t *hw, snd_hwdep_dsp_status_t *i
 		[USX2Y_TYPE_224] = "us224",
 		[USX2Y_TYPE_428] = "us428",
 	};
+	usX2Ydev_t *us428 = hw->private_data;
 	int id = -1;
 
-	switch (le16_to_cpu(((usX2Ydev_t*)hw->private_data)->chip.dev->descriptor.idProduct)) {
+	switch (le16_to_cpu(us428->chip.dev->descriptor.idProduct)) {
 	case USB_ID_US122:
 		id = USX2Y_TYPE_122;
 		break;
@@ -144,7 +145,7 @@ static int snd_usX2Y_hwdep_dsp_status(snd_hwdep_t *hw, snd_hwdep_dsp_status_t *i
 		return -ENODEV;
 	strcpy(info->id, type_ids[id]);
 	info->num_dsps = 2;		// 0: Prepad Data, 1: FPGA Code
- 	if (((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT) 
+ 	if (us428->chip_status & USX2Y_STAT_CHIP_INIT) 
 		info->chip_ready = 1;
  	info->version = USX2Y_DRIVER_VERSION; 
 	return 0;

sound/usb/usx2y/usbusx2y.c

@@ -285,7 +285,6 @@ int usX2Y_AsyncSeq04_init(usX2Ydev_t* usX2Y)
 
 int usX2Y_In04_init(usX2Ydev_t* usX2Y)
 {
-	int	err = 0;
 	if (! (usX2Y->In04urb = usb_alloc_urb(0, GFP_KERNEL)))
 		return -ENOMEM;
 
@@ -299,8 +298,7 @@ int usX2Y_In04_init(usX2Ydev_t* usX2Y)
 			 usX2Y->In04Buf, 21,
 			 i_usX2Y_In04Int, usX2Y,
 			 10);
-	err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
-	return err;
+	return usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
 }
 
 static void usX2Y_unlinkSeq(snd_usX2Y_AsyncSeq_t* S)
@@ -432,20 +430,21 @@ static void snd_usX2Y_card_private_free(snd_card_t *card)
 static void usX2Y_usb_disconnect(struct usb_device* device, void* ptr)
 {
 	if (ptr) {
-		usX2Ydev_t* usX2Y = usX2Y((snd_card_t*)ptr);
-		struct list_head* p;
+		snd_card_t *card = ptr;
+		usX2Ydev_t* usX2Y = usX2Y(card);
+		struct list_head *p;
 		usX2Y->chip.shutdown = 1;
 		usX2Y->chip_status = USX2Y_STAT_CHIP_HUP;
 		usX2Y_unlinkSeq(&usX2Y->AS04);
 		usb_kill_urb(usX2Y->In04urb);
-		snd_card_disconnect((snd_card_t*)ptr);
+		snd_card_disconnect(card);
 		/* release the midi resources */
 		list_for_each(p, &usX2Y->chip.midi_list) {
 			snd_usbmidi_disconnect(p);
 		}
 		if (usX2Y->us428ctls_sharedmem) 
 			wake_up(&usX2Y->us428ctls_wait_queue_head);
-		snd_card_free((snd_card_t*)ptr);
+		snd_card_free(card);
 	}
 }
 

sound/usb/usx2y/usbusx2yaudio.c

@@ -205,47 +205,42 @@ static int usX2Y_urb_submit(snd_usX2Y_substream_t *subs, struct urb *urb, int fr
 static inline int usX2Y_usbframe_complete(snd_usX2Y_substream_t *capsubs, snd_usX2Y_substream_t *playbacksubs, int frame)
 {
 	int err, state;
-	{
-		struct urb *urb = playbacksubs->completed_urb;
-
-		state = atomic_read(&playbacksubs->state);
-		if (NULL != urb) {
-			if (state == state_RUNNING)
-				usX2Y_urb_play_retire(playbacksubs, urb);
-			else
-				if (state >= state_PRERUNNING) {
-					atomic_inc(&playbacksubs->state);
-				}
-		} else {
-			switch (state) {
-			case state_STARTING1:
-				urb = playbacksubs->urb[0];
+	struct urb *urb = playbacksubs->completed_urb;
+
+	state = atomic_read(&playbacksubs->state);
+	if (NULL != urb) {
+		if (state == state_RUNNING)
+			usX2Y_urb_play_retire(playbacksubs, urb);
+		else
+			if (state >= state_PRERUNNING)
 				atomic_inc(&playbacksubs->state);
-				break;
-			case state_STARTING2:
-				urb = playbacksubs->urb[1];
-				atomic_inc(&playbacksubs->state);
-				break;
-			}
-		}
-		if (urb) {
-			if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
-			    (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
-				return err;
-			}
+	} else {
+		switch (state) {
+		case state_STARTING1:
+			urb = playbacksubs->urb[0];
+			atomic_inc(&playbacksubs->state);
+			break;
+		case state_STARTING2:
+			urb = playbacksubs->urb[1];
+			atomic_inc(&playbacksubs->state);
+			break;
 		}
-
-		playbacksubs->completed_urb = NULL;
 	}
+	if (urb) {
+		if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
+		    (err = usX2Y_urb_submit(playbacksubs, urb, frame)))
+			return err;
+	}
+
+	playbacksubs->completed_urb = NULL;
+
 	state = atomic_read(&capsubs->state);
 	if (state >= state_PREPARED) {
 		if (state == state_RUNNING) {
 			if ((err = usX2Y_urb_capt_retire(capsubs)))
 				return err;
-		} else
-			if (state >= state_PRERUNNING) {
-				atomic_inc(&capsubs->state);
-			}
+		} else if (state >= state_PRERUNNING)
+			atomic_inc(&capsubs->state);
 		if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
 			return err;
 	}
@@ -429,7 +424,7 @@ static int usX2Y_urbs_allocate(snd_usX2Y_substream_t *subs)
 	}
 	/* allocate and initialize data urbs */
 	for (i = 0; i < NRURBS; i++) {
-		struct urb** purb = subs->urb + i;
+		struct urb **purb = subs->urb + i;
 		if (*purb) {
 			usb_kill_urb(*purb);
 			continue;
@@ -480,47 +475,45 @@ static int usX2Y_urbs_start(snd_usX2Y_substream_t *subs)
 			goto start;
 	}
 	usX2Y->wait_iso_frame = -1;
+
  start:
-	{
-		usX2Y_subs_startup(subs);
-		for (i = 0; i < NRURBS; i++) {
-			struct urb *urb = subs->urb[i];
-			if (usb_pipein(urb->pipe)) {
-				unsigned long pack;
-				if (0 == i)
-					atomic_set(&subs->state, state_STARTING3);
-				urb->dev = usX2Y->chip.dev;
-				urb->transfer_flags = URB_ISO_ASAP;
-				for (pack = 0; pack < nr_of_packs(); pack++) {
-					urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
-					urb->iso_frame_desc[pack].length = subs->maxpacksize;
-				}
-				urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 
-				if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
-					snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
-					err = -EPIPE;
-					goto cleanup;
-				} else {
-					if (0 > usX2Y->wait_iso_frame)
-						usX2Y->wait_iso_frame = urb->start_frame;
-				}
-				urb->transfer_flags = 0;
+	usX2Y_subs_startup(subs);
+	for (i = 0; i < NRURBS; i++) {
+		struct urb *urb = subs->urb[i];
+		if (usb_pipein(urb->pipe)) {
+			unsigned long pack;
+			if (0 == i)
+				atomic_set(&subs->state, state_STARTING3);
+			urb->dev = usX2Y->chip.dev;
+			urb->transfer_flags = URB_ISO_ASAP;
+			for (pack = 0; pack < nr_of_packs(); pack++) {
+				urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
+				urb->iso_frame_desc[pack].length = subs->maxpacksize;
+			}
+			urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 
+			if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+				snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
+				err = -EPIPE;
+				goto cleanup;
 			} else {
-				atomic_set(&subs->state, state_STARTING1);
-				break;
+				if (0 > usX2Y->wait_iso_frame)
+					usX2Y->wait_iso_frame = urb->start_frame;
 			}
+			urb->transfer_flags = 0;
+		} else {
+			atomic_set(&subs->state, state_STARTING1);
+			break;
 		}
-		err = 0;
-		wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
-		if (atomic_read(&subs->state) != state_PREPARED) {
-			err = -EPIPE;
-		}
+	}
+	err = 0;
+	wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
+	if (atomic_read(&subs->state) != state_PREPARED)
+		err = -EPIPE;
 
-	cleanup:
-		if (err) {
-			usX2Y_subs_startup_finish(usX2Y);
-			usX2Y_clients_stop(usX2Y);		// something is completely wroong > stop evrything
-		}
+ cleanup:
+	if (err) {
+		usX2Y_subs_startup_finish(usX2Y);
+		usX2Y_clients_stop(usX2Y);		// something is completely wroong > stop evrything
 	}
 	return err;
 }
@@ -667,13 +660,12 @@ static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
 	struct s_c2		*ra = rate == 48000 ? SetRate48000 : SetRate44100;
 
 	if (usX2Y->rate != rate) {
-		us = kmalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
+		us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
 		if (NULL == us) {
 			err = -ENOMEM;
 			goto cleanup;
 		}
-		memset(us, 0, sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS); 
-		usbdata = kmalloc(sizeof(int)*NOOF_SETRATE_URBS, GFP_KERNEL);
+		usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
 		if (NULL == usbdata) {
 			err = -ENOMEM;
 			goto cleanup;
@@ -713,9 +705,8 @@ static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
 			usX2Y->US04 = NULL;
 			kfree(usbdata);
 			kfree(us);
-			if (!err) {
+			if (!err)
 				usX2Y->rate = rate;
-			}
 		}
 	}
 
@@ -759,30 +750,29 @@ static int snd_usX2Y_pcm_hw_params(snd_pcm_substream_t *substream,
 	int			err = 0;
 	unsigned int		rate = params_rate(hw_params);
 	snd_pcm_format_t	format = params_format(hw_params);
-	snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
-
-	{	// all pcm substreams off one usX2Y have to operate at the same rate & format
 		snd_card_t *card = substream->pstr->pcm->card;
 		struct list_head *list;
-		list_for_each(list, &card->devices) {
-			snd_device_t *dev;
-			snd_pcm_t *pcm;
-			int s;
-			dev = snd_device(list);
-			if (dev->type != SNDRV_DEV_PCM)
-				continue;
-			pcm = dev->device_data;
-			for (s = 0; s < 2; ++s) {
-				snd_pcm_substream_t *test_substream;
-				test_substream = pcm->streams[s].substream;
-				if (test_substream && test_substream != substream  &&
-				    test_substream->runtime &&
-				    ((test_substream->runtime->format &&
-				      test_substream->runtime->format != format) ||
-				     (test_substream->runtime->rate &&
-				      test_substream->runtime->rate != rate)))
-					return -EINVAL;
-			}
+
+	snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
+	// all pcm substreams off one usX2Y have to operate at the same rate & format
+	list_for_each(list, &card->devices) {
+		snd_device_t *dev;
+		snd_pcm_t *pcm;
+		int s;
+		dev = snd_device(list);
+		if (dev->type != SNDRV_DEV_PCM)
+			continue;
+		pcm = dev->device_data;
+		for (s = 0; s < 2; ++s) {
+			snd_pcm_substream_t *test_substream;
+			test_substream = pcm->streams[s].substream;
+			if (test_substream && test_substream != substream  &&
+			    test_substream->runtime &&
+			    ((test_substream->runtime->format &&
+			      test_substream->runtime->format != format) ||
+			     (test_substream->runtime->rate &&
+			      test_substream->runtime->rate != rate)))
+				return -EINVAL;
 		}
 	}
 	if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {

sound/usb/usx2y/usx2yhwdeppcm.c

@@ -177,10 +177,8 @@ static inline int usX2Y_usbpcm_usbframe_complete(snd_usX2Y_substream_t *capsubs,
 	if (NULL != urb) {
 		if (state == state_RUNNING)
 			usX2Y_urb_play_retire(playbacksubs, urb);
-		else
-			if (state >= state_PRERUNNING) {
-				atomic_inc(&playbacksubs->state);
-			}
+		else if (state >= state_PRERUNNING)
+			atomic_inc(&playbacksubs->state);
 	} else {
 		switch (state) {
 		case state_STARTING1:
@@ -207,10 +205,8 @@ static inline int usX2Y_usbpcm_usbframe_complete(snd_usX2Y_substream_t *capsubs,
 		if (state == state_RUNNING) {
 			if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs)))
 				return err;
-		} else {
-			if (state >= state_PRERUNNING)
-				atomic_inc(&capsubs->state);
-		}
+		} else if (state >= state_PRERUNNING)
+			atomic_inc(&capsubs->state);
 		usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb);
 		if (NULL != capsubs2)
 			usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb);
@@ -330,7 +326,7 @@ static int usX2Y_usbpcm_urbs_allocate(snd_usX2Y_substream_t *subs)
 
 	/* allocate and initialize data urbs */
 	for (i = 0; i < NRURBS; i++) {
-		struct urb** purb = subs->urb + i;
+		struct urb **purb = subs->urb + i;
 		if (*purb) {
 			usb_kill_urb(*purb);
 			continue;
@@ -582,10 +578,9 @@ static int snd_usX2Y_usbpcm_close(snd_pcm_substream_t *substream)
 {
 	snd_pcm_runtime_t *runtime = substream->runtime;
 	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
-	int err = 0;
-	snd_printd("\n");
+
 	subs->pcm_substream = NULL;
-	return err;
+	return 0;
 }
 
 
@@ -710,9 +705,9 @@ static struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
 static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area)
 {
 	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
-	usX2Ydev_t	*usX2Y = (usX2Ydev_t*)hw->private_data;
+	usX2Ydev_t	*usX2Y = hw->private_data;
 
-	if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT))
+	if (!(usX2Y->chip_status & USX2Y_STAT_CHIP_INIT))
 		return -EBUSY;
 
 	/* if userspace tries to mmap beyond end of our buffer, fail */ 
@@ -726,7 +721,6 @@ static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct
 	}
 	area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
 	area->vm_flags |= VM_RESERVED;
-	snd_printd("vm_flags=0x%lX\n", area->vm_flags);
 	area->vm_private_data = hw->private_data;
 	return 0;
 }
@@ -734,7 +728,7 @@ static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct
 
 static void snd_usX2Y_hwdep_pcm_private_free(snd_hwdep_t *hwdep)
 {
-	usX2Ydev_t *usX2Y = (usX2Ydev_t *)hwdep->private_data;
+	usX2Ydev_t *usX2Y = hwdep->private_data;
 	if (NULL != usX2Y->hwdep_pcm_shm)
 		snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(snd_usX2Y_hwdep_pcm_shm_t));
 }
@@ -749,10 +743,9 @@ int usX2Y_hwdep_pcm_new(snd_card_t* card)
 	if (1 != nr_of_packs())
 		return 0;
 
-	if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0) {
-		snd_printd("\n");
+	if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0)
 		return err;
-	}
+
 	hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM;
 	hw->private_data = usX2Y(card);
 	hw->private_free = snd_usX2Y_hwdep_pcm_private_free;