Staging: line6: fix up NULL assignment mistakes

Should use NULL for a pointer, not 0, otherwise sparse complains.

Cc: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/line6/audio.c

@@ -62,10 +62,10 @@ void line6_cleanup_audio(struct usb_line6 *line6)
 {
 	struct snd_card *card = line6->card;
 
-	if(card == 0)
+	if (card == NULL)
 		return;
 
 	snd_card_disconnect(card);
 	snd_card_free(card);
-	line6->card = 0;
+	line6->card = NULL;
 }

drivers/staging/line6/capture.c

@@ -279,7 +279,7 @@ static int snd_line6_capture_hw_free(struct snd_pcm_substream *substream)
 
 	if(line6pcm->buffer_in) {
 		kfree(line6pcm->buffer_in);
-		line6pcm->buffer_in = 0;
+		line6pcm->buffer_in = NULL;
 	}
 
 	return snd_pcm_lib_free_pages(substream);

drivers/staging/line6/driver.c

@@ -301,7 +301,7 @@ char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2, in
 
 	if(!buffer) {
 		dev_err(line6->ifcdev, "out of memory\n");
-		return 0;
+		return NULL;
 	}
 
 	buffer[0] = LINE6_SYSEX_BEGIN;
@@ -469,7 +469,7 @@ int line6_read_data(struct usb_line6 *line6, int address, void *data, size_t dat
 	/* query the serial number: */
 	ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
 												USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
-												(datalen << 8) | 0x21, address, 0, 0, LINE6_TIMEOUT * HZ);
+												(datalen << 8) | 0x21, address, NULL, 0, LINE6_TIMEOUT * HZ);
 
 	if(ret < 0) {
 		dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
@@ -630,8 +630,8 @@ static void line6_list_devices(void)
 static int line6_probe(struct usb_interface *interface, const struct usb_device_id *id)
 {
 	int devtype;
-	struct usb_device *usbdev = 0;
-	struct usb_line6 *line6 = 0;
+	struct usb_device *usbdev = NULL;
+	struct usb_line6 *line6 = NULL;
 	const struct line6_properties *properties;
 	int devnum;
 	int interface_number, alternate = 0;
@@ -987,7 +987,7 @@ static void line6_disconnect(struct usb_interface *interface)
 
 		for(i = LINE6_MAX_DEVICES; i--;)
 			if(line6_devices[i] == line6)
-				line6_devices[i] = 0;
+				line6_devices[i] = NULL;
 	}
 
 	line6_destruct(interface);
@@ -1016,13 +1016,13 @@ static int __init line6_init(void)
 	printk("%s driver version %s%s\n", DRIVER_NAME, DRIVER_VERSION, DRIVER_REVISION);
 	line6_workqueue = create_workqueue(DRIVER_NAME);
 
-	if(line6_workqueue == 0) {
+	if (line6_workqueue == NULL) {
 		err("couldn't create workqueue");
 		return -EINVAL;
 	}
 
 	for(i = LINE6_MAX_DEVICES; i--;)
-		line6_devices[i] = 0;
+		line6_devices[i] = NULL;
 
 	retval = usb_register(&line6_driver);
 

drivers/staging/line6/midibuf.c

@@ -44,7 +44,7 @@ int midibuf_init(struct MidiBuffer *this, int size, int split)
 {
 	this->buf = (unsigned char *)kmalloc(size, GFP_KERNEL);
 
-	if(this->buf == 0)
+	if (this->buf == NULL)
 		return -ENOMEM;
 
 	this->size = size;
@@ -261,8 +261,6 @@ int midibuf_skip_message(struct MidiBuffer *this, unsigned short mask)
 
 void midibuf_destroy(struct MidiBuffer *this)
 {
-	if(this->buf != 0) {
-		kfree(this->buf);
-		this->buf = 0;
-	}
+	kfree(this->buf);
+	this->buf = NULL;
 }

drivers/staging/line6/playback.c

@@ -329,7 +329,7 @@ static int snd_line6_playback_hw_free(struct snd_pcm_substream *substream)
 
 	if(line6pcm->wrap_out) {
 		kfree(line6pcm->wrap_out);
-		line6pcm->wrap_out = 0;
+		line6pcm->wrap_out = NULL;
 	}
 
 	return snd_pcm_lib_free_pages(substream);

drivers/staging/line6/toneport.c

@@ -117,7 +117,7 @@ static int toneport_send_cmd(struct usb_device *usbdev, int cmd1, int cmd2)
 	int ret;
 	ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev,0), 0x67,
 												USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
-												cmd1, cmd2, 0, 0, LINE6_TIMEOUT * HZ);
+												cmd1, cmd2, NULL, 0, LINE6_TIMEOUT * HZ);
 
 	if(ret < 0)	{
 		err("send failed (error %d)\n", ret);